US20130261751A1 - Reverse shoulder orthopaedic implant having an elliptical glenosphere component - Google Patents
Reverse shoulder orthopaedic implant having an elliptical glenosphere component Download PDFInfo
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- US20130261751A1 US20130261751A1 US13/431,416 US201213431416A US2013261751A1 US 20130261751 A1 US20130261751 A1 US 20130261751A1 US 201213431416 A US201213431416 A US 201213431416A US 2013261751 A1 US2013261751 A1 US 2013261751A1
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- glenosphere component
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2/40—Joints for shoulders
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4612—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of shoulders
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
- A61F2002/30494—Cooperating protrusions and recesses, e.g. radial serrations, located on abutting end surfaces of a longitudinal connection
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
- A61F2002/30616—Sets comprising a plurality of prosthetic parts of different sizes or orientations
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/40—Joints for shoulders
- A61F2/4014—Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
- A61F2002/4018—Heads or epiphyseal parts of humerus
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/40—Joints for shoulders
- A61F2/4081—Glenoid components, e.g. cups
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2002/4681—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor by applying mechanical shocks, e.g. by hammering
Definitions
- the present disclosure relates generally to orthopaedic implants, and more particularly to reverse shoulder orthopaedic implants.
- a humeral prosthesis is used to replace the natural head of the patient's humerus.
- the humeral prosthesis typically includes an elongated stem component that is implanted into the intramedullary canal of the patient's humerus and a hemispherically-shaped prosthetic head component that is secured to the stem component.
- the natural glenoid surface of the scapula is resurfaced or otherwise replaced with a glenoid component that provides a bearing surface upon which the prosthetic head component of the humeral prosthesis articulates.
- a reverse shoulder implant reverses the anatomy, or structure, of the healthy shoulder.
- a reverse shoulder implant is designed such that the prosthetic head (i.e., the “ball” in the ball-and-socket joint) known as a glenosphere component is secured to the patient's scapula, with the corresponding concave bearing (i.e., the “socket” in the ball-and-socket joint) known as a humeral cup being secured to the patient's humerus.
- the prosthetic head i.e., the “ball” in the ball-and-socket joint
- the corresponding concave bearing i.e., the “socket” in the ball-and-socket joint
- a reverse shoulder orthopaedic implant includes a glenosphere component having a curved lateral bearing surface configured to articulate with a humeral cup of a humeral prosthesis, and a medial surface having a tapered bore formed therein.
- the glenosphere component has an anterior/posterior width defined by the distance between an anterior-most point of the lateral bearing surface and a posterior-most point of the lateral bearing surface, and a superior/inferior width defined by the distance between a superior-most point of the lateral bearing surface and an inferior-most point of the lateral bearing surface.
- the anterior/posterior width of the glenosphere component is greater than its superior/inferior width.
- the lateral bearing surface of the glenosphere component may be hemi-ellipsoidal in shape.
- the glenosphere component may be metallic.
- the reverse shoulder orthopaedic implant may also include a metaglene component having an annular-shaped platform with an elongated stem extending outwardly from a medial surface thereof.
- a tapered outer surface of the annular-shaped platform may be taper locked in the tapered bore of the glenosphere component.
- the lateral bearing surface of the glenosphere component may be hemi-ellipsoidal in shape.
- the glenosphere component may be metallic.
- An imaginary line segment extends from a superior-most point of the medial surface to an inferior-most point of the medial surface.
- the center of the bore may be positioned between the midpoint of the imaginary line segment and the superior-most point of the medial surface. Alternatively, the center of the bore may be positioned at the midpoint of the imaginary line segment.
- the reverse shoulder orthopaedic implant may also include a metaglene component having an annular-shaped platform with an elongated stem extending downwardly from a lower surface thereof.
- the bore formed in the glenosphere component may include a tapered bore, with a tapered outer surface of the annular-shaped platform being taper locked in such a tapered bore.
- a reverse shoulder orthopaedic implant includes a glenosphere component having a lateral bearing surface configured to articulate with a humeral cup of a humeral prosthesis.
- the lateral bearing surface is hemi-ellipsoidal in shape with its longitudinal axis extending in the anterior/posterior direction.
- the reverse shoulder orthopaedic implant also includes a metaglene component secured to the glenosphere component.
- An anterior/posterior width of the glenosphere component may be defined by the distance between an anterior-most point of the lateral bearing surface and a posterior-most point of the lateral bearing surface, with its superior/inferior width being defined by the distance between a superior-most point of the lateral bearing surface and an inferior-most point of the lateral bearing surface.
- the anterior/posterior width of the glenosphere component is greater than the superior/inferior width of the glenosphere component.
- a tapered bore may be formed in the medial surface of the glenosphere component, with a tapered outer surface of the metaglene component being taper locked therein.
- An imaginary line segment extends from a superior-most point of the medial surface to an inferior-most point of the medial surface.
- the center of the tapered bore may be positioned between the midpoint of the imaginary line segment and the superior-most point of the medial surface. Alternatively, the center of the tapered bore may be positioned at the midpoint of the imaginary line segment.
- Both the glenosphere component and the metaglene component may be metallic.
- Each of the number of screw holes defines a circumference.
- An outer edge of the locking flange of the screw cap overlaps at least a portion of the circumference of each of the number of screw holes of the metaglene component.
- the bore formed in the elongated stem of the metaglene component may be embodied as a threaded bore and the shaft of the screw cap may be embodied as a threaded shaft that is threaded into the threaded bore of the metaglene component.
- the reverse shoulder orthopaedic implant may also include a glenosphere component having a bore formed therein, with the screw cap being captured in the bore of the glenosphere component.
- the reverse shoulder orthopaedic implant may also include a retaining ring secured within the bore of the glenosphere component so as to retain the screw cap therein.
- the reverse shoulder orthopaedic implant may further include a number of compression screws positioned in the number of screw holes of the metaglene component.
- Each of such compression screws has a screw head having a round outer edge, with an outer edge of the locking flange of the screw cap overlapping at least a portion of the round outer edge of each of the number of screw holes of the metaglene component.
- a reverse shoulder orthopaedic implant includes a metaglene component having a platform with a number of screw holes extending therethrough, and an elongated stem extending downwardly from a medial surface thereof.
- the elongated stem has a bore formed therein.
- the reverse shoulder orthopaedic implant also includes a glenosphere component having a bore formed therein and a screw cap captured in the bore of the glenosphere component.
- the screw cap is rotatable relative to the glenosphere component.
- the screw cap has a shaft positioned in the bore of the metaglene component, and a locking flange extending outwardly from the shaft so as to at least partially cover each of the number of screw holes of the metaglene component.
- the locking flange of the screw cap may include an annular-shaped beveled surface.
- Each of the number of screw holes defines a circumference.
- An outer edge of the locking flange of the screw cap overlaps at least a portion of the circumference of each of the number of screw holes of the metaglene component.
- the bore formed in the elongated stem of the metaglene component may be embodied as a threaded bore and the shaft of the screw cap may be embodied as a threaded shaft that is threaded into the threaded bore of the metaglene component.
- the reverse shoulder orthopaedic implant may also include a number of compression screws positioned in the number of screw holes of the metaglene component.
- the locking flange of the screw cap may include an annular-shaped beveled surface, with each of the number of compression screws has a screw head having a round outer edge. The beveled surface of the locking flange of the screw cap contacts the round outer edge of each of the number of screw holes of the metaglene component.
- a reverse shoulder orthopaedic implant includes a metaglene component configured to be implanted into the scapula of a patient.
- the metaglene component has a platform with a number of screw holes extending therethrough.
- a number of compression screws are positioned in the number of screw holes of the metaglene component.
- Each of the number of compression screws has a screw head with a round outer edge.
- a screw cap is secured to the metaglene component.
- the screw cap has a locking flange that includes an outer edge that overlaps at least a portion of the round outer edge of each of the number of screw holes of the metaglene component.
- Each of the number of screw holes defines a circumference, with the outer edge of the locking flange of the screw cap overlapping at least a portion of the circumference of each of the number of screw holes of the metaglene component.
- the platform of the metaglene component may include an elongated stem with a threaded bore formed therein, with the screw cap having a threaded shaft extending downwardly for a lower surface of the locking flange.
- the threaded shaft of the screw cap may be threaded into the threaded bore of the metaglene component.
- FIG. 1 is an anterior elevational view showing a reverse shoulder orthopaedic implant that has been implanted into the shoulder of a patient;
- FIG. 3 is an elevational view of the lateral bearing surface of the elliptical glenosphere component of FIG. 2 ;
- FIG. 5 is a medial elevational view of the elliptical glenosphere component of FIG. 3 showing the tapered bore positioned in a centered position;
- FIG. 7 is a cross sectional view showing the elliptical glenosphere component of FIG. 3 implanted on the scapula of a patient;
- FIG. 9 is a cross sectional view showing the compression screws and screw cap installed on the metaglene component
- FIG. 10 is a plan view showing the compression screws and screw cap installed on the metaglene component
- FIG. 13 is a view similar to FIG. 12 , but showing the glenosphere component secured to the metaglene component.
- Terms representing anatomical references such as anterior, posterior, medial, lateral, superior, inferior, etcetera, may be used throughout this disclosure in reference to both the orthopaedic implants described herein and a patient's natural anatomy. Such terms have well-understood meanings in both the study of anatomy and the field of orthopaedics. Use of such anatomical reference terms in the specification and claims is intended to be consistent with their well-understood meanings unless noted otherwise.
- the reverse shoulder orthopaedic implant 10 for replacing the natural shoulder joint of a patient.
- the reverse shoulder orthopaedic implant 10 includes an elliptical glenosphere component 12 that is secured to the glenoid surface 20 of the patient's scapula 22 by a metaglene component 14 implanted in the bone tissue of the scapula 22 .
- the elliptical glenosphere component 12 articulates on the bearing surface 24 of a humeral cup 26 of a humeral prosthesis.
- the humeral cup 26 is secured to a humeral stem component 28 that is implanted in the intramedullary canal of a patient's humerus (not shown).
- the elliptical glenosphere component 12 also includes a substantially flat medial surface 36 opposite its lateral bearing surface 34 .
- the medial surface 36 has a tapered bore 38 formed therein.
- the tapered sidewalls 40 defining the bore 38 extend laterally away from the medial surface 36 to a bottom wall 42 .
- an annular-shaped tapered surface of the metaglene component 14 may be inserted into the tapered bore to engage the sidewalls 40 thereby taper locking the elliptical glenosphere component 12 to the metaglene component 14 .
- an installation hole 44 opens into the bottom wall 42 of the tapered bore 38 , with the other end of the installation hole 44 opening into the lateral bearing surface 34 .
- a surgical instrument such as a hex head driver, may be passed through the installation hole 44 during a surgical procedure to implant the elliptical glenosphere component 12 .
- the glenosphere component 12 described herein is hemi-ellipsoidal in shape. As can be seen in FIGS. 2 and 3 , the glenosphere component 12 is wider in the anterior/posterior direction than it is in the superior/inferior direction. Specifically, as can best be seen in FIG. 2 , the longitudinal axis 46 of the glenosphere component 12 extends in the anterior/posterior direction, with its shorter lateral axis 48 extending in the superior/inferior direction. This is demonstrated geometrically in the elevational view of the glenosphere component's lateral bearing surface 34 shown in FIG.
- an imaginary line segment 52 extends between an anterior-most point 54 of the glenosphere component 12 (i.e., the anterior-most point on the glenosphere component's lateral bearing surface 34 ) and a posterior-most point 56 (i.e., the posterior-most point on the glenosphere component's lateral bearing surface 34 ) of the glenosphere component 12 .
- the length of the imaginary line segment 52 defines the anterior/posterior width of the glenosphere component 12 .
- the line segment 52 extends orthogonally between an imaginary tangent line 58 passing through the anterior-most point 54 of the glenosphere component 12 and an imaginary tangent line 60 passing through the posterior-most point 56 of the glenosphere component 12 .
- an imaginary line segment 62 extends between a superior-most point 64 of the glenosphere component 12 (i.e., the superior-most point on the glenosphere component's lateral bearing surface 34 ) and an inferior-most point 66 of the glenosphere component 12 (i.e., the inferior-most point on the glenosphere component's lateral bearing surface 34 ).
- an imaginary line segment 62 extends between a superior-most point 64 of the glenosphere component 12 (i.e., the superior-most point on the glenosphere component's lateral bearing surface 34 ) and an inferior-most point 66 of the glenosphere component 12 (i.e., the inferior-most point on the glenosphere component'
- the line segment 62 extends orthogonally between an imaginary tangent line 68 passing through the superior-most point 64 of the glenosphere component 12 and an imaginary tangent line 70 passing through the inferior-most point 66 of the glenosphere component 12 .
- the length of the imaginary line segment 62 defines the superior/inferior width of the glenosphere component 12 . Because the glenosphere component 12 is wider in the anterior/posterior direction than it is in the superior/inferior direction, the imaginary line segment 52 is longer than the imaginary line segment 62 .
- a glenosphere component 12 is wider in the anterior/posterior direction than it is in the superior/inferior direction may reduce the occurrences of notching in some patients.
- a glenosphere component that is wider in the anterior/posterior direction than it is in the superior/inferior direction may reduce the occasions in which the medial side of the glenosphere component contacts the scapula relative to a hemispherically-shaped glenosphere component.
- the glenosphere component's tapered bore 38 may be centered in the superior/inferior direction (see FIG. 6 ) or offset superiorly in the superior/inferior direction (see FIG. 7 ).
- the central axis 72 of the tapered bore 38 may be positioned at the center of the superior/inferior width of the elliptical glenosphere component 12 , or it may be positioned superiorly of the center of the superior/inferior width of the elliptical glenosphere component 12 .
- FIG. 5 the central axis 72 of the tapered bore 38 is positioned on the midpoint 74 of the imaginary line segment 62 defining the superior/inferior width of the glenosphere component 12 .
- FIG. 5 in the case of a centered glenosphere component 10 , the central axis 72 of the tapered bore 38 is positioned on the midpoint 74 of the imaginary line segment 62 defining the superior/inferior width of the glenosphere component 12 .
- FIG. 5 in the case of a centered glenosphere component 10 , the central axis 72 of the tapered bore 38 is positioned on the midpoint 74 of the imaginary line segment 62 defining the superior/inferior width of the glenosphere component 12 .
- FIG. 5 in the case of a centered glenosphere component 10 , the central axis 72 of the tapered bore 38 is positioned on the midpoint 74 of the imaginary line segment 62 defining the superior/inferior width
- the central axis 72 of the tapered bore 38 is still positioned on the imaginary line segment 62 defining the superior/inferior width of the glenosphere component 12 , but is spaced apart from its midpoint 74 in the superior direction.
- the central axis 72 of the tapered bore 38 is positioned on the imaginary line segment 62 at a location between its midpoint 74 and the superior-most point 64 .
- the tapered bore 38 of the elliptical glenosphere component 12 may also be offset in other directions.
- the tapered bore 38 of the elliptical glenosphere component 12 may be offset anteriorly or posteriorly relative to the center of the glenosphere component's medial surface 36 (i.e., it may be offset anteriorly or superiorly relative to the midpoint 74 that bisects the imaginary line segment 62 ).
- the tapered bore 38 of the elliptical glenosphere component 12 may be offset inferiorly relative to the center of the glenosphere component's medial surface 36 .
- the tapered bore 38 of the elliptical glenosphere component 12 may be offset in a combination of directions relative to the center of the glenosphere component's medial surface 36 .
- the tapered bore 38 of the elliptical glenosphere component 12 may be offset both superiorly and anteriorly (or superiorly and posteriorly) relative to the center of the glenosphere component's medial surface 36 .
- the glenosphere component 12 may be constructed with an implant-grade biocompatible metal, although other materials may also be used.
- metals include cobalt, including cobalt alloys such as a cobalt chrome alloy, titanium, including titanium alloys such as a Ti6Al4V alloy, and stainless steel.
- the lateral bearing surface 34 of such a metallic glenosphere component 12 may be polished or otherwise treated to enhance its smooth bearing surface.
- the glenosphere component 12 may be provided in various different configurations to provide the flexibility necessary to conform to varying anatomies from patient to patient.
- the glenosphere component 12 may be provided in various superior/inferior diameters to match the needs of a given patient.
- the glenosphere component 12 may be provided in two different superior/inferior diameters—38 mm and 42 mm.
- the glenosphere component 12 is installed on the metaglene component 14 implanted in the bone tissue of the glenoid surface 20 of the patient's scapula 22 .
- the surgeon first aligns the glenosphere component 12 relative to the implanted metaglene component 14 such that its tapered bore 38 is aligned with the an annular-shaped tapered outer surface 108 of the metaglene component 14 .
- the surgeon advances the glenosphere component 12 such that the tapered outer surface 108 of the metaglene component 14 is inserted into the tapered bore 38 of the glenosphere component 12 .
- the surgeon then strikes the glenosphere component 12 (or a head impaction tool positioned thereon) with a surgical mallet, sledge, or other impaction tool to drive the glenosphere component 12 medially so as to urge the sidewalls 40 defining the glenosphere component's tapered bore 38 into contact with the tapered outer surface 108 of the metaglene component 14 thereby taper locking the glenosphere component 12 to the implanted metaglene component 14 .
- Such final assembly of the glenosphere component 12 to the implanted metaglene component 14 is shown in FIGS. 2 and 7 .
- the metaglene component 14 includes a platform 102 having a stem 104 extending outwardly from its medial surface 106 .
- the metaglene component's stem 104 is configured to be implanted into the surgically-prepared bone tissue of the glenoid surface 20 of the patient's scapula 22 .
- the glenosphere component 12 is securable to metaglene component 14 .
- the outer annular surface 108 of the metaglene component's platform is tapered.
- the glenosphere component 12 may be installed on the metaglene component 14 such that the tapered outer surface 108 of the metaglene component 14 is inserted into the tapered bore 38 of the glenosphere component 12 . So positioned, the glenosphere component 12 may be driven or otherwise urged toward the metaglene component 14 such that the sidewalls 40 defining the glenosphere component's tapered bore 38 are urged into contact with the tapered outer surface 108 of the metaglene component 14 thereby taper locking the glenosphere component 12 to the metaglene component 14 .
- the metaglene component's stem 104 has a threaded bore 110 formed therein.
- the threaded bore 110 extends through the entire length of the stem 104 , although it could be embodied as a blind bore.
- a number of threads 112 are formed in the sidewall that defines the threaded bore 110 .
- the threads 112 are sized to match, and hence threadingly receive, the threads of a screw cap 140 and a retraction tool (not shown).
- the metaglene component's platform 102 has a number of screw holes 114 extending therethrough.
- One end of each of the screw holes 114 opens into the medial surface 106 of the platform 102 , with its other end opening into the platform's opposite lateral surface 116 .
- each of the screw holes 114 is counterbored to accommodate the screw heads of the compression screws used to secure the metaglene component 12 to the bone tissue of the patient's scapula 22 .
- the upper end of the screw holes 114 has a larger diameter than does the lower end of the screw holes 114 .
- Each of the screw holes 114 is located in one of the four quadrants of the metaglene component's platform 102 . As such, each of the screw holes 114 is positioned about 90° from one another.
- each of the screw holes 114 is spaced radially outwardly from the center of the metaglene component's platform 102 at a position between the threaded bore 110 and the outer annular edge 118 where the platform's lateral surface 116 meets its tapered outer surface 108 .
- the lateral surface 116 of the metaglene component's platform 102 has a countersunk surface 120 formed therein.
- each of the screw holes 114 opens partially into the countersunk surface 120 of the metaglene component's platform 102 .
- each of the screw holes 114 defines a circumference 122 .
- An inner section 124 of the circumference 122 of each of the screw holes 114 i.e., a section positioned near the center of the metaglene component's platform 102 ) is positioned within the countersunk surface 120 .
- the metaglene component 14 may be provided in a single, “universal” size that accommodates glenosphere components of various sizes.
- a metaglene component 14 may be provided in a single size to accommodate both a 38 mm glenosphere component 12 and a 42 mm glenosphere component 12 .
- a compression screw 130 may be positioned in some or all of the screw holes 114 to secure the metaglene component 12 to the bone tissue of the patient's scapula 22 .
- Each of the compression screws 130 includes a threaded shank 132 having a round screw head 134 on an end thereof. The diameter of the threaded shank 132 is smaller than the diameter of the lower end of the counterbored screw holes 114 of the metaglene component 12 so that the threaded shank 132 may pass through the entire length of the screw holes 114 .
- the screw head 134 has a diameter smaller than the upper end of the counterbored screw holes 114 , but larger than the lower end of the counterbored screw holes 114 . As such, the screw heads 134 of the compression screws 130 are contained in the upper end of the counterbored screw holes 114 when installed in the metaglene component 12 .
- a screw cap 140 is secured to the metaglene component 14 .
- the screw cap 140 includes a locking flange 142 having a threaded shaft 144 extending away from its lower surface 146 .
- the screw cap's threaded shaft 144 may be threaded into the threaded bore 110 of the metaglene component's stem 104 to secure the screw cap 140 to the metaglene component.
- a drive socket 148 such as a hex drive socket, is formed in an upper surface 150 of the screw cap's locking flange 142 .
- a drive tool such as a hex driver (not shown), may be inserted into the drive socket 148 to drive (i.e., rotate) the screw cap 140 relative to the metaglene component 14 .
- Rotation in one direction e.g., clockwise
- rotation in the opposite direction e.g., counterclockwise
- the lower surface 146 of the screw cap's locking flange 142 defines a generally conical annular-shaped beveled surface 152 .
- the annular-shaped beveled surface 152 is sized and shaped to be received into and closely compliment the countersunk surface 120 of the metaglene component's platform 102 .
- the locking flange 142 partially covers the metaglene component's screw holes 114 and hence the heads 134 of the compression screws 130 positioned therein.
- the annular-shaped beveled surface 152 of the screw cap's locking flange 142 contacts or otherwise engages the round outer edge 136 of each screw head 134 of any of the compression screws 130 installed in the metaglene component 14 .
- Such contact generates a clamping force to resist the compression screws 130 from backing out from the bone tissue of the patient's scapula 22 .
- the screw cap 140 may be constructed with an implant-grade biocompatible metal, although other materials may also be used.
- implant-grade biocompatible metal examples include cobalt, including cobalt alloys such as a cobalt chrome alloy, titanium, including titanium alloys such as a Ti6Al4V alloy, and stainless steel.
- the metaglene component 14 may first be implanted into the surgically-prepared glenoid surface 20 of the patient's scapula 22 by positioning it at the desired location and orientation, and thereafter fixing it in place by inserting one or more compression screw(s) 130 through the screw holes 114 and driving them into the bone tissue. Once the compression screws 114 have been seated, the surgeon may then install the screw cap 140 by inserting its threaded shaft 144 into the threaded bore 110 of the metaglene component's stem 104 and thereafter rotating the screw cap 140 with a hex driver (not shown) inserted into the drive socket 148 formed in the upper surface 150 of the screw cap's locking flange 142 .
- Tightening of the screw cap 140 in such a manner urges the annular-shaped beveled surface 152 of the screw cap's locking flange 142 into contact with the round outer edge 136 of each screw head 134 of the compression screws 130 installed in the metaglene component 14 thereby asserting a clamping force on the screw heads 134 to resist the compression screws 130 from backing out the bone tissue of the patient's scapula 22 .
- the surgeon may then taper lock the glenosphere component 12 to the implanted metaglene component 14 in the manner described above.
- FIGS. 11-13 there is shown an embodiment in which the screw cap 140 is captured in the glenosphere component 14 .
- slight modification has been made to the glenosphere component 14 and the screw cap 140 as shown in FIGS. 11-13 .
- the same reference numerals are used in FIGS. 11-13 to designate components similar to those discussed above in regard to FIGS. 1-10 .
- the screw cap 140 is captured and retained in the tapered bore 38 of the glenosphere component 12 by a retaining ring 160 . To do so, the screw cap 140 of the design of FIGS.
- 11-13 includes a cylindrically-shaped surface 162 that mates at one end with the annular-shaped beveled surface 152 of the screw cap's locking flange 142 and at its opposite end with an annular retaining flange 164 .
- the retaining ring 160 is captured on the cylindrically-shaped surface 162 of the screw cap 140 . That is, the cylindrically-shaped surface 162 of the screw cap 140 is positioned in the retaining ring's opening 166 . As can be seen in FIGS.
- the inner diameter of the retaining ring 160 (i.e., the diameter of its opening 166 ) is greater than the diameter of the cylindrically-shaped surface 162 of the screw cap 140 , but less than the diameter of the screw cap's retaining flange 164 .
- the outer diameter of the retaining ring 160 (i.e., the diameter of its outer surface 168 ) is greater than the diameter of the screw cap's retaining flange 16 and is sized and configured to be press fit, welded (or press fit and welded), or taper locked to the tapered sidewalls 40 defining the glenosphere component's tapered bore 38 .
- the retaining ring 160 captures the screw cap 140 in the glenosphere component's tapered bore 38 . So captured, both free rotation and limited linear movement of the screw cap 140 relative to the glenosphere component 12 are allowed, but it is prevented from escaping the glenosphere component's tapered bore 38 .
- FIGS. 11-13 may be installed in a similar manner to as described above in regard to the design of FIGS. 8-10 .
- the metaglene component 14 may first be implanted into the surgically-prepared glenoid surface 20 of the patient's scapula 22 by positioning it at the desired location and orientation, and thereafter fixing it in place by inserting one or more compression screw(s) 130 through the screw holes 114 and driving them into the bone tissue. Once the compression screws 114 have been seated, the surgeon may then install the glenosphere component 12 , and hence the screw cap 140 captured therein, by inserting the screw cap's threaded shaft 144 into the threaded bore 110 of the metaglene component's stem 104 .
- the drive tip of a hex driver (not shown) may be advanced through the glenosphere component's installation hole 44 and into the screw cap's drive socket 148 .
- the surgeon then rotates the screw cap 140 with the hex driver.
- Such tightening of the screw cap 140 urges the annular-shaped beveled surface 152 of the screw cap's locking flange 142 into contact with the round outer edge 136 of each screw head 134 of the compression screws 130 installed in the metaglene component 14 thereby asserting a clamping force on the screw heads 134 to resist the compression screws 130 from backing out of the bone tissue of the patient's scapula 22 .
- the surgeon may then taper lock the glenosphere component 12 to the implanted metaglene component 14 in the manner described above.
- the surgeon may first remove the glenosphere component 12 , and hence the captured screw cap 140 , from the implanted metaglene component 14 by inserting the drive tip of a hex driver through the glenosphere component's installation hole 44 and into the screw cap's drive socket 148 . The surgeon then rotates the screw cap 140 with the hex driver in a direction opposite to the direction used to install the screw cap 140 .
- surgeon may use a drive tool (not shown) to remove the compression screws 130 .
- An extraction tool (not shown) may be threaded into the threaded bore 110 of the metaglene component's stem 104 and thereafter used to extract the metaglene component 14 from the bone tissue of the patient's scapula 22 .
- the screw caps 140 described above in regard to FIGS. 8-13 provide efficiency during a surgical procedure to implant the metaglene component 14 .
- the screw caps 140 allow for implantation of the metaglene component 14 without the use of self-locking surgical screws. Surgical installation of self-locking surgical screws requires the use of a guide wire and other surgical considerations. By providing a locking function, the screw cap 140 allows compression screws, which are much easier to surgically install, to be used in lieu of self-locking surgical screws.
- the concepts and features disclosed herein may be used in various combinations with one another or independently of one another.
- the elliptical glenosphere component 12 of FIGS. 1-6 may be used in combination with either the metaglene component 14 of FIGS. 8-10 or the metaglene component 14 of FIGS. 11-13 .
- the elliptical glenosphere component 12 of FIGS. 1-6 may be used in combination with other metaglene components, including metaglene components without the screw caps 140 described herein.
- the metaglene component 14 of FIGS. 8-10 may be used in combination with the elliptical glenosphere component 12 of FIGS.
- the metaglene component 14 of FIGS. 11-13 may be used in combination with the elliptical glenosphere component 12 of FIGS. 1-6 , or, alternatively, may be used with a conventional hemispherically-shaped or other type of glenosphere component.
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Abstract
Description
- Cross reference is made to copending U.S. patent application Ser. No. ______ (Attorney Docket No. 265280-220505), entitled “REVERSE SHOULDER ORTHOPAEDIC IMPLANT HAVING A METAGLENE COMPONENT WITH A SCREW LOCKING CAP” by Kyle Lappin which is assigned to the same assignee as the present invention and which is filed concurrently herewith.
- The present disclosure relates generally to orthopaedic implants, and more particularly to reverse shoulder orthopaedic implants.
- During the lifetime of a patient, it may be necessary to perform a total shoulder replacement procedure on the patient as a result of, for example, disease or trauma. In a total shoulder replacement procedure, a humeral prosthesis is used to replace the natural head of the patient's humerus. The humeral prosthesis typically includes an elongated stem component that is implanted into the intramedullary canal of the patient's humerus and a hemispherically-shaped prosthetic head component that is secured to the stem component. In such a total shoulder replacement procedure, the natural glenoid surface of the scapula is resurfaced or otherwise replaced with a glenoid component that provides a bearing surface upon which the prosthetic head component of the humeral prosthesis articulates.
- However, in some cases the patient's natural shoulder, including its soft tissue, has degenerated to a severe degree of joint instability and pain. In many such cases, it may be necessary to change the mechanics of the shoulder. Reverse shoulder implants are used to do so. As its name suggests, a reverse shoulder implant reverses the anatomy, or structure, of the healthy shoulder. In particular, a reverse shoulder implant is designed such that the prosthetic head (i.e., the “ball” in the ball-and-socket joint) known as a glenosphere component is secured to the patient's scapula, with the corresponding concave bearing (i.e., the “socket” in the ball-and-socket joint) known as a humeral cup being secured to the patient's humerus. Such a reverse configuration allows the patient's deltoid muscle, which is one of the larger and stronger shoulder muscles, to raise the arm.
- According to one aspect, a reverse shoulder orthopaedic implant includes a glenosphere component having a curved lateral bearing surface configured to articulate with a humeral cup of a humeral prosthesis, and a medial surface having a tapered bore formed therein. The glenosphere component has an anterior/posterior width defined by the distance between an anterior-most point of the lateral bearing surface and a posterior-most point of the lateral bearing surface, and a superior/inferior width defined by the distance between a superior-most point of the lateral bearing surface and an inferior-most point of the lateral bearing surface. The anterior/posterior width of the glenosphere component is greater than its superior/inferior width.
- The lateral bearing surface of the glenosphere component may be hemi-ellipsoidal in shape. The glenosphere component may be metallic.
- An imaginary line segment extends from a superior-most point of the medial surface to an inferior-most point of the medial surface. The center of the tapered bore may be positioned between the midpoint of the imaginary line segment and the superior-most point of the medial surface. Alternatively, the center of the tapered bore may be positioned at the midpoint of the imaginary line segment.
- The reverse shoulder orthopaedic implant may also include a metaglene component having an annular-shaped platform with an elongated stem extending outwardly from a medial surface thereof. A tapered outer surface of the annular-shaped platform may be taper locked in the tapered bore of the glenosphere component.
- According to another aspect, a reverse shoulder orthopaedic implant includes a glenosphere component having a curved lateral bearing surface configured to articulate with a humeral cup of a humeral prosthesis, and a medial surface having a bore formed therein to receive a metaglene component. The glenosphere component has an anterior/posterior width defined by the distance between an anterior-most point of the glenosphere component and a posterior-most point of the glenosphere component, and a superior/inferior width defined by the distance between a superior-most point of the glenosphere component and an inferior-most point of the glenosphere component. The anterior/posterior width of the glenosphere component is greater than the superior/inferior width of the glenosphere component.
- The lateral bearing surface of the glenosphere component may be hemi-ellipsoidal in shape. The glenosphere component may be metallic.
- An imaginary line segment extends from a superior-most point of the medial surface to an inferior-most point of the medial surface. The center of the bore may be positioned between the midpoint of the imaginary line segment and the superior-most point of the medial surface. Alternatively, the center of the bore may be positioned at the midpoint of the imaginary line segment.
- The reverse shoulder orthopaedic implant may also include a metaglene component having an annular-shaped platform with an elongated stem extending downwardly from a lower surface thereof. The bore formed in the glenosphere component may include a tapered bore, with a tapered outer surface of the annular-shaped platform being taper locked in such a tapered bore.
- According to another aspect, a reverse shoulder orthopaedic implant includes a glenosphere component having a lateral bearing surface configured to articulate with a humeral cup of a humeral prosthesis. The lateral bearing surface is hemi-ellipsoidal in shape with its longitudinal axis extending in the anterior/posterior direction. The reverse shoulder orthopaedic implant also includes a metaglene component secured to the glenosphere component.
- An anterior/posterior width of the glenosphere component may be defined by the distance between an anterior-most point of the lateral bearing surface and a posterior-most point of the lateral bearing surface, with its superior/inferior width being defined by the distance between a superior-most point of the lateral bearing surface and an inferior-most point of the lateral bearing surface. The anterior/posterior width of the glenosphere component is greater than the superior/inferior width of the glenosphere component.
- A tapered bore may be formed in the medial surface of the glenosphere component, with a tapered outer surface of the metaglene component being taper locked therein.
- An imaginary line segment extends from a superior-most point of the medial surface to an inferior-most point of the medial surface. The center of the tapered bore may be positioned between the midpoint of the imaginary line segment and the superior-most point of the medial surface. Alternatively, the center of the tapered bore may be positioned at the midpoint of the imaginary line segment.
- Both the glenosphere component and the metaglene component may be metallic.
- The platform of the metaglene component may include a number of screw holes extending therethrough.
- According to another aspect, a reverse shoulder orthopaedic implant includes a metaglene component having a platform with a number of screw holes extending therethrough, and an elongated stem extending downwardly from a medial surface thereof. The elongated stem is configured to be implanted into the scapula of a patient. The elongated stem has a bore formed therein. The reverse shoulder orthopaedic implant also includes a screw cap having a shaft positioned in the bore of the metaglene component, and a locking flange extending outwardly from the shaft so as to at least partially cover each of the number of screw holes of the metaglene component.
- Each of the number of screw holes defines a circumference. An outer edge of the locking flange of the screw cap overlaps at least a portion of the circumference of each of the number of screw holes of the metaglene component.
- The bore formed in the elongated stem of the metaglene component may be embodied as a threaded bore and the shaft of the screw cap may be embodied as a threaded shaft that is threaded into the threaded bore of the metaglene component.
- The locking flange may be annular shaped, with the shaft extending outwardly from a lower surface of the locking flange. A drive socket may be formed in the upper surface of the locking flange.
- The reverse shoulder orthopaedic implant may also include a glenosphere component having a bore formed therein, with the screw cap being captured in the bore of the glenosphere component.
- The reverse shoulder orthopaedic implant may also include a retaining ring secured within the bore of the glenosphere component so as to retain the screw cap therein.
- The reverse shoulder orthopaedic implant may further include a number of compression screws positioned in the number of screw holes of the metaglene component. Each of such compression screws has a screw head having a round outer edge, with an outer edge of the locking flange of the screw cap overlapping at least a portion of the round outer edge of each of the number of screw holes of the metaglene component.
- According to another aspect, a reverse shoulder orthopaedic implant includes a metaglene component having a platform with a number of screw holes extending therethrough, and an elongated stem extending downwardly from a medial surface thereof. The elongated stem has a bore formed therein. The reverse shoulder orthopaedic implant also includes a glenosphere component having a bore formed therein and a screw cap captured in the bore of the glenosphere component. The screw cap is rotatable relative to the glenosphere component. The screw cap has a shaft positioned in the bore of the metaglene component, and a locking flange extending outwardly from the shaft so as to at least partially cover each of the number of screw holes of the metaglene component.
- The locking flange of the screw cap may include an annular-shaped beveled surface.
- The screw cap may also include a cylindrically-shaped surface extending upwardly from the annular-shaped beveled surface, and a retaining flange extending outwardly from the cylindrically-shaped surface. A retaining ring may be positioned around the cylindrically-shaped surface of the screw cap and secured to the sidewalls of the glenosphere defining the bore. The diameter of the retaining flange of the screw cap is larger than the inner diameter of the retaining ring and smaller than the outer diameter of the retaining ring.
- A drive socket is formed in an upper surface of the retaining flange of the screw cap.
- The retaining ring may be press fit within the bore of the glenosphere component so as to retain the screw cap therein.
- Each of the number of screw holes defines a circumference. An outer edge of the locking flange of the screw cap overlaps at least a portion of the circumference of each of the number of screw holes of the metaglene component.
- The bore formed in the elongated stem of the metaglene component may be embodied as a threaded bore and the shaft of the screw cap may be embodied as a threaded shaft that is threaded into the threaded bore of the metaglene component.
- The reverse shoulder orthopaedic implant may also include a number of compression screws positioned in the number of screw holes of the metaglene component. The locking flange of the screw cap may include an annular-shaped beveled surface, with each of the number of compression screws has a screw head having a round outer edge. The beveled surface of the locking flange of the screw cap contacts the round outer edge of each of the number of screw holes of the metaglene component.
- According to another aspect, a reverse shoulder orthopaedic implant includes a metaglene component configured to be implanted into the scapula of a patient. The metaglene component has a platform with a number of screw holes extending therethrough. A number of compression screws are positioned in the number of screw holes of the metaglene component. Each of the number of compression screws has a screw head with a round outer edge. A screw cap is secured to the metaglene component. The screw cap has a locking flange that includes an outer edge that overlaps at least a portion of the round outer edge of each of the number of screw holes of the metaglene component.
- Each of the number of screw holes defines a circumference, with the outer edge of the locking flange of the screw cap overlapping at least a portion of the circumference of each of the number of screw holes of the metaglene component.
- The platform of the metaglene component may include an elongated stem with a threaded bore formed therein, with the screw cap having a threaded shaft extending downwardly for a lower surface of the locking flange. The threaded shaft of the screw cap may be threaded into the threaded bore of the metaglene component.
- A drive socket may be formed in an upper surface of the screw cap.
- The detailed description particularly refers to the following figures, in which:
-
FIG. 1 is an anterior elevational view showing a reverse shoulder orthopaedic implant that has been implanted into the shoulder of a patient; -
FIG. 2 is a lateral elevational view showing the elliptical glenosphere component of the reverse shoulder orthopaedic implant ofFIG. 1 implanted on the scapula of a patient; -
FIG. 3 is an elevational view of the lateral bearing surface of the elliptical glenosphere component ofFIG. 2 ; -
FIG. 4 is a cross sectional view of the elliptical glenosphere component taken along the line 4-4 ofFIG. 3 , as viewed in the direction of the arrows; -
FIG. 5 is a medial elevational view of the elliptical glenosphere component ofFIG. 3 showing the tapered bore positioned in a centered position; -
FIG. 6 is a view similar toFIG. 5 , but showing the tapered bore positioned in an offset position; -
FIG. 7 is a cross sectional view showing the elliptical glenosphere component ofFIG. 3 implanted on the scapula of a patient; -
FIG. 8 is an exploded perspective view showing a screw cap used to lock the compression screws within a metaglene component; -
FIG. 9 is a cross sectional view showing the compression screws and screw cap installed on the metaglene component; -
FIG. 10 is a plan view showing the compression screws and screw cap installed on the metaglene component; -
FIG. 11 is an exploded perspective view showing a screw cap that is captured in a glenosphere component and used to lock the compression screws within a metaglene component; -
FIG. 12 is an assembled cross sectional view showing the screw cap captured in the glenosphere component by the retaining ring; and -
FIG. 13 is a view similar toFIG. 12 , but showing the glenosphere component secured to the metaglene component. - While the concepts of the present disclosure are susceptible to various modifications and alternative forms, specific exemplary embodiments thereof have been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit the concepts of the present disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
- Terms representing anatomical references, such as anterior, posterior, medial, lateral, superior, inferior, etcetera, may be used throughout this disclosure in reference to both the orthopaedic implants described herein and a patient's natural anatomy. Such terms have well-understood meanings in both the study of anatomy and the field of orthopaedics. Use of such anatomical reference terms in the specification and claims is intended to be consistent with their well-understood meanings unless noted otherwise.
- Referring now to
FIGS. 1-6 , there is shown a reverse shoulderorthopaedic implant 10 for replacing the natural shoulder joint of a patient. The reverse shoulderorthopaedic implant 10 includes anelliptical glenosphere component 12 that is secured to theglenoid surface 20 of the patient'sscapula 22 by ametaglene component 14 implanted in the bone tissue of thescapula 22. Theelliptical glenosphere component 12 articulates on the bearingsurface 24 of ahumeral cup 26 of a humeral prosthesis. As can be seen inFIG. 1 , thehumeral cup 26 is secured to ahumeral stem component 28 that is implanted in the intramedullary canal of a patient's humerus (not shown). - The
elliptical glenosphere component 12 includes abody 32 having a curvedlateral surface 34. The curvedlateral surface 34 of thebody 32 provides a smooth bearing surface upon which the bearingsurface 24 of thehumeral cup 26 articulates. As can be seen inFIG. 2-4 , thelateral bearing surface 34 is hemi-ellipsoidal in shape. That is, thelateral bearing surface 34 defines the general shape of ellipsoid sliced in half along its longitudinal plane. - The
elliptical glenosphere component 12 also includes a substantially flatmedial surface 36 opposite itslateral bearing surface 34. Themedial surface 36 has a taperedbore 38 formed therein. The tapered sidewalls 40 defining thebore 38 extend laterally away from themedial surface 36 to abottom wall 42. As will be discussed below in more detail, an annular-shaped tapered surface of themetaglene component 14 may be inserted into the tapered bore to engage thesidewalls 40 thereby taper locking theelliptical glenosphere component 12 to themetaglene component 14. - As can be seen in
FIG. 4 , one end of aninstallation hole 44 opens into thebottom wall 42 of the tapered bore 38, with the other end of theinstallation hole 44 opening into thelateral bearing surface 34. As will be discussed below in greater detail, a surgical instrument, such as a hex head driver, may be passed through theinstallation hole 44 during a surgical procedure to implant theelliptical glenosphere component 12. - As alluded to above, unlike conventional hemispherically-shaped components, the
glenosphere component 12 described herein is hemi-ellipsoidal in shape. As can be seen inFIGS. 2 and 3 , theglenosphere component 12 is wider in the anterior/posterior direction than it is in the superior/inferior direction. Specifically, as can best be seen inFIG. 2 , thelongitudinal axis 46 of theglenosphere component 12 extends in the anterior/posterior direction, with its shorterlateral axis 48 extending in the superior/inferior direction. This is demonstrated geometrically in the elevational view of the glenosphere component'slateral bearing surface 34 shown inFIG. 3 where both the anterior/posterior and the widths of theglenosphere component 12 are shown as a pair of imaginary line segments extending through theglenosphere component 12 in their respective directions. In particular, animaginary line segment 52 extends between ananterior-most point 54 of the glenosphere component 12 (i.e., the anterior-most point on the glenosphere component's lateral bearing surface 34) and a posterior-most point 56 (i.e., the posterior-most point on the glenosphere component's lateral bearing surface 34) of theglenosphere component 12. The length of theimaginary line segment 52 defines the anterior/posterior width of theglenosphere component 12. As can be seen inFIG. 3 , in the illustrative embodiment described herein, theline segment 52 extends orthogonally between an imaginarytangent line 58 passing through theanterior-most point 54 of theglenosphere component 12 and an imaginarytangent line 60 passing through theposterior-most point 56 of theglenosphere component 12. Similarly, animaginary line segment 62 extends between asuperior-most point 64 of the glenosphere component 12 (i.e., the superior-most point on the glenosphere component's lateral bearing surface 34) and aninferior-most point 66 of the glenosphere component 12 (i.e., the inferior-most point on the glenosphere component's lateral bearing surface 34). As can be seen inFIG. 3 , in the illustrative embodiment described herein, theline segment 62 extends orthogonally between an imaginarytangent line 68 passing through thesuperior-most point 64 of theglenosphere component 12 and an imaginarytangent line 70 passing through theinferior-most point 66 of theglenosphere component 12. The length of theimaginary line segment 62 defines the superior/inferior width of theglenosphere component 12. Because theglenosphere component 12 is wider in the anterior/posterior direction than it is in the superior/inferior direction, theimaginary line segment 52 is longer than theimaginary line segment 62. - It should be appreciated that such an arrangement in which the
glenosphere component 12 is wider in the anterior/posterior direction than it is in the superior/inferior direction may reduce the occurrences of notching in some patients. In particular, depending on the anatomy of a specific patient, a glenosphere component that is wider in the anterior/posterior direction than it is in the superior/inferior direction may reduce the occasions in which the medial side of the glenosphere component contacts the scapula relative to a hemispherically-shaped glenosphere component. - As can be seen in the elevational views of the glenosphere component's
medial surface 36 shown inFIGS. 5 and 6 , the glenosphere component's tapered bore 38 may be centered in the superior/inferior direction (seeFIG. 6 ) or offset superiorly in the superior/inferior direction (seeFIG. 7 ). In particular, thecentral axis 72 of the tapered bore 38 may be positioned at the center of the superior/inferior width of theelliptical glenosphere component 12, or it may be positioned superiorly of the center of the superior/inferior width of theelliptical glenosphere component 12. The is demonstrated in the elevational views of the glenosphere component'smedial surface 36 shown inFIGS. 5 and 6 where the position of thecentral axis 72 of the tapered bore 38 is shown relative to a midpoint 74 that bisects theimaginary line segment 62 defining the superior/inferior width of theglenosphere component 12. As can be seen inFIG. 5 , in the case of acentered glenosphere component 10, thecentral axis 72 of the tapered bore 38 is positioned on the midpoint 74 of theimaginary line segment 62 defining the superior/inferior width of theglenosphere component 12. However, as can be seen inFIG. 6 , in the case of an offsetglenosphere component 10, thecentral axis 72 of the tapered bore 38 is still positioned on theimaginary line segment 62 defining the superior/inferior width of theglenosphere component 12, but is spaced apart from its midpoint 74 in the superior direction. In other words, in the case of an offsetglenosphere component 10, thecentral axis 72 of the tapered bore 38 is positioned on theimaginary line segment 62 at a location between its midpoint 74 and thesuperior-most point 64. - Such offset of the tapered bore 38 in the superior direction offsets the
glenosphere component 12 in the inferior direction when it is secured to themetaglene component 14 implanted in the patient's glenoid surface. Such an implanted offsetglenosphere component 12 is shown inFIG. 2 . It should be appreciated that such an inferior offset of theglenosphere component 12 may reduce the occurrences of notching in some patients. In particular, depending on the anatomy of a specific patient, a glenosphere component offset inferiorly may reduce the occasions in which the medial side of the glenosphere component contacts the scapula relative to a centered glenosphere component. - It should be appreciated that the tapered bore 38 of the
elliptical glenosphere component 12 may also be offset in other directions. For example, the tapered bore 38 of theelliptical glenosphere component 12 may be offset anteriorly or posteriorly relative to the center of the glenosphere component's medial surface 36 (i.e., it may be offset anteriorly or superiorly relative to the midpoint 74 that bisects the imaginary line segment 62). Moreover, the tapered bore 38 of theelliptical glenosphere component 12 may be offset inferiorly relative to the center of the glenosphere component'smedial surface 36. Yet, further, the tapered bore 38 of theelliptical glenosphere component 12 may be offset in a combination of directions relative to the center of the glenosphere component'smedial surface 36. For example, the tapered bore 38 of theelliptical glenosphere component 12 may be offset both superiorly and anteriorly (or superiorly and posteriorly) relative to the center of the glenosphere component'smedial surface 36. - The
glenosphere component 12 may be constructed with an implant-grade biocompatible metal, although other materials may also be used. Examples of such metals include cobalt, including cobalt alloys such as a cobalt chrome alloy, titanium, including titanium alloys such as a Ti6Al4V alloy, and stainless steel. Thelateral bearing surface 34 of such ametallic glenosphere component 12 may be polished or otherwise treated to enhance its smooth bearing surface. - The
glenosphere component 12 may be provided in various different configurations to provide the flexibility necessary to conform to varying anatomies from patient to patient. For example, theglenosphere component 12 may be provided in various superior/inferior diameters to match the needs of a given patient. For example, in one illustrative embodiment, theglenosphere component 12 may be provided in two different superior/inferior diameters—38 mm and 42 mm. - As shown in
FIG. 7 , theglenosphere component 12 is installed on themetaglene component 14 implanted in the bone tissue of theglenoid surface 20 of the patient'sscapula 22. To do so, the surgeon first aligns theglenosphere component 12 relative to the implantedmetaglene component 14 such that itstapered bore 38 is aligned with the an annular-shaped taperedouter surface 108 of themetaglene component 14. The surgeon then advances theglenosphere component 12 such that the taperedouter surface 108 of themetaglene component 14 is inserted into the tapered bore 38 of theglenosphere component 12. The surgeon then strikes the glenosphere component 12 (or a head impaction tool positioned thereon) with a surgical mallet, sledge, or other impaction tool to drive theglenosphere component 12 medially so as to urge thesidewalls 40 defining the glenosphere component's tapered bore 38 into contact with the taperedouter surface 108 of themetaglene component 14 thereby taper locking theglenosphere component 12 to the implantedmetaglene component 14. Such final assembly of theglenosphere component 12 to the implantedmetaglene component 14 is shown inFIGS. 2 and 7 . - Referring now to
FIGS. 8-10 , there is shown themetaglene component 14 in more detail. Themetaglene component 14 includes aplatform 102 having astem 104 extending outwardly from itsmedial surface 106. The metaglene component'sstem 104 is configured to be implanted into the surgically-prepared bone tissue of theglenoid surface 20 of the patient'sscapula 22. As described above, theglenosphere component 12 is securable to metaglenecomponent 14. In particular, the outerannular surface 108 of the metaglene component's platform is tapered. As described in detail above, theglenosphere component 12 may be installed on themetaglene component 14 such that the taperedouter surface 108 of themetaglene component 14 is inserted into the tapered bore 38 of theglenosphere component 12. So positioned, theglenosphere component 12 may be driven or otherwise urged toward themetaglene component 14 such that thesidewalls 40 defining the glenosphere component's tapered bore 38 are urged into contact with the taperedouter surface 108 of themetaglene component 14 thereby taper locking theglenosphere component 12 to themetaglene component 14. - As best seen in
FIGS. 8 and 90 , the metaglene component'sstem 104 has a threadedbore 110 formed therein. The threaded bore 110 extends through the entire length of thestem 104, although it could be embodied as a blind bore. A number of threads 112 are formed in the sidewall that defines the threadedbore 110. The threads 112 are sized to match, and hence threadingly receive, the threads of ascrew cap 140 and a retraction tool (not shown). - As can be seen in
FIGS. 8-10 , the metaglene component'splatform 102 has a number of screw holes 114 extending therethrough. One end of each of the screw holes 114 opens into themedial surface 106 of theplatform 102, with its other end opening into the platform's oppositelateral surface 116. As can be seen best inFIG. 9 , each of the screw holes 114 is counterbored to accommodate the screw heads of the compression screws used to secure themetaglene component 12 to the bone tissue of the patient'sscapula 22. As such, the upper end of the screw holes 114 has a larger diameter than does the lower end of the screw holes 114. Each of the screw holes 114 is located in one of the four quadrants of the metaglene component'splatform 102. As such, each of the screw holes 114 is positioned about 90° from one another. - In the illustrative embodiment described herein, each of the screw holes 114 is spaced radially outwardly from the center of the metaglene component's
platform 102 at a position between the threadedbore 110 and the outerannular edge 118 where the platform'slateral surface 116 meets its taperedouter surface 108. As can be seen inFIGS. 8 and 9 , thelateral surface 116 of the metaglene component'splatform 102 has a countersunksurface 120 formed therein. As can be seen inFIG. 8 , each of the screw holes 114 opens partially into the countersunksurface 120 of the metaglene component'splatform 102. In particular, as can be seen from the elevational view of the metaglene component'slateral surface 116 shown inFIG. 10 , the external boundary or perimeter of each of the screw holes 114 defines acircumference 122. An inner section 124 of thecircumference 122 of each of the screw holes 114 (i.e., a section positioned near the center of the metaglene component's platform 102) is positioned within the countersunksurface 120. - The
metaglene component 14 may be constructed with an implant-grade biocompatible metal, although other materials may also be used. Examples of such metals include cobalt, including cobalt alloys such as a cobalt chrome alloy, titanium, including titanium alloys such as a Ti6Al4V alloy, and stainless steel. Such ametallic metaglene component 14 may also be coated with a surface treatment, such as hyaluronic acid (HA), to enhance biocompatibility. Moreover, the surfaces of themetaglene component 14 that engage the natural bone, such as themedial surface 106 ofplatform 102 and the outer surfaces of thestem 104 may be textured to facilitate securing the component to the bone. Such surfaces may also be porous coated to promote bone ingrowth for permanent fixation. - Unlike the
glenosphere component 12 that may be provided in various sizes to provide the flexibility necessary to conform to varying anatomies from patient to patient, in the illustrative embodiment described herein, themetaglene component 14 may be provided in a single, “universal” size that accommodates glenosphere components of various sizes. For example, in one illustrative embodiment, ametaglene component 14 may be provided in a single size to accommodate both a 38mm glenosphere component 12 and a 42mm glenosphere component 12. - As can be seen in
FIGS. 8-10 , acompression screw 130 may be positioned in some or all of the screw holes 114 to secure themetaglene component 12 to the bone tissue of the patient'sscapula 22. Each of the compression screws 130 includes a threadedshank 132 having around screw head 134 on an end thereof. The diameter of the threadedshank 132 is smaller than the diameter of the lower end of the counterbored screw holes 114 of themetaglene component 12 so that the threadedshank 132 may pass through the entire length of the screw holes 114. Thescrew head 134, on the other hand, has a diameter smaller than the upper end of the counterbored screw holes 114, but larger than the lower end of the counterbored screw holes 114. As such, the screw heads 134 of the compression screws 130 are contained in the upper end of the counterbored screw holes 114 when installed in themetaglene component 12. - Like the
metaglene component 14, the compression screws 130 may be constructed with an implant-grade biocompatible metal, although other materials may also be used. Examples of such metals include cobalt, including cobalt alloys such as a cobalt chrome alloy, titanium, including titanium alloys such as a Ti6Al4V alloy, and stainless steel. - As can be seen in
FIGS. 8-10 , ascrew cap 140 is secured to themetaglene component 14. Thescrew cap 140 includes a lockingflange 142 having a threadedshaft 144 extending away from itslower surface 146. The screw cap's threadedshaft 144 may be threaded into the threaded bore 110 of the metaglene component'sstem 104 to secure thescrew cap 140 to the metaglene component. Adrive socket 148, such as a hex drive socket, is formed in anupper surface 150 of the screw cap'slocking flange 142. A drive tool, such as a hex driver (not shown), may be inserted into thedrive socket 148 to drive (i.e., rotate) thescrew cap 140 relative to themetaglene component 14. Rotation in one direction (e.g., clockwise) may be used to tighten, and hence secure, thescrew cap 140 to themetaglene component 14, with rotation in the opposite direction (e.g., counterclockwise) being used to loosen, and hence, remove thescrew cap 140 from themetaglene component 14. - As can be seen in
FIG. 9 , thelower surface 146 of the screw cap'slocking flange 142 defines a generally conical annular-shapedbeveled surface 152. The annular-shapedbeveled surface 152 is sized and shaped to be received into and closely compliment the countersunksurface 120 of the metaglene component'splatform 102. In such a way, the lockingflange 142 partially covers the metaglene component's screw holes 114 and hence theheads 134 of the compression screws 130 positioned therein. What is meant herein by “cover” in regard to the position of the lockingflange 142 relative to the screw holes 114 of themetaglene component 14 and/or theheads 134 of the compression screws 130 is that the outerannular edge 154 overlays or overlaps at least a section of thecircumference 122 of the screw holes 114 and/or the roundouter edge 136 of the compression screws 130. This is best demonstrated in the lateral elevational or plan view ofFIG. 10 . Specifically, when viewed laterally such as the case ofFIG. 10 , the outerannular edge 154 of the screw cap'slocking flange 142 intersects, and hence overlaps, thecircumference 122 of each of the screw holes 114 and the roundouter edge 136 of each of the compression screws 130. In such a way, the lockingflange 142 prevents the compression screws 130 from backing out and escaping the screw holes 114. - As can be seen in
FIG. 9 , when thescrew cap 140 is installed to themetaglene component 14, the annular-shapedbeveled surface 152 of the screw cap'slocking flange 142 contacts or otherwise engages the roundouter edge 136 of eachscrew head 134 of any of the compression screws 130 installed in themetaglene component 14. Such contact generates a clamping force to resist the compression screws 130 from backing out from the bone tissue of the patient'sscapula 22. - Like the
metaglene component 14 and the compression screws 130, thescrew cap 140 may be constructed with an implant-grade biocompatible metal, although other materials may also be used. Examples of such metals include cobalt, including cobalt alloys such as a cobalt chrome alloy, titanium, including titanium alloys such as a Ti6Al4V alloy, and stainless steel. - As shown in
FIG. 7 , themetaglene component 14 may first be implanted into the surgically-preparedglenoid surface 20 of the patient'sscapula 22 by positioning it at the desired location and orientation, and thereafter fixing it in place by inserting one or more compression screw(s) 130 through the screw holes 114 and driving them into the bone tissue. Once the compression screws 114 have been seated, the surgeon may then install thescrew cap 140 by inserting its threadedshaft 144 into the threaded bore 110 of the metaglene component'sstem 104 and thereafter rotating thescrew cap 140 with a hex driver (not shown) inserted into thedrive socket 148 formed in theupper surface 150 of the screw cap'slocking flange 142. Tightening of thescrew cap 140 in such a manner urges the annular-shapedbeveled surface 152 of the screw cap'slocking flange 142 into contact with the roundouter edge 136 of eachscrew head 134 of the compression screws 130 installed in themetaglene component 14 thereby asserting a clamping force on the screw heads 134 to resist the compression screws 130 from backing out the bone tissue of the patient'sscapula 22. Once thescrew cap 140 has been installed, the surgeon may then taper lock theglenosphere component 12 to the implantedmetaglene component 14 in the manner described above. - If the
metaglene component 14 subsequently needs to be removed during, for example, a revision procedure, the surgeon may first remove theglenosphere component 12 from the implantedmetaglene component 14 by breaking the taper lock connection between the two components and lifting theglenosphere component 12 away. Thereafter, the surgeon may insert a hex driver (not shown) into thedrive socket 148 formed in theupper surface 150 of the screw cap'slocking flange 142 and rotating thescrew cap 140 in a direction opposite to the direction used to install thescrew cap 140. Loosening of the screw cap in such a manner moves the annular-shapedbeveled surface 152 of the screw cap'slocking flange 142 out of contact with the roundouter edge 136 of eachscrew head 134 of the compression screws 130 installed in themetaglene component 14 thereby releasing the clamping force from the screw heads 134. Continued loosening of thescrew cap 140 allows its threadedshaft 144 to escape the threaded bore 110 of the metaglene component'sstem 104 thereby allowing thescrew cap 140 to be lifted away. Thereafter, the surgeon may use a drive tool (not shown) to remove the compression screws 130. An extraction tool (not shown) may be threaded into the threaded bore 110 of the metaglene component'sstem 104 and thereafter used to extract themetaglene component 14 from the bone tissue of the patient'sscapula 22. - Referring now to
FIGS. 11-13 , there is shown an embodiment in which thescrew cap 140 is captured in theglenosphere component 14. In such an embodiment, slight modification has been made to theglenosphere component 14 and thescrew cap 140 as shown inFIGS. 11-13 . The same reference numerals are used inFIGS. 11-13 to designate components similar to those discussed above in regard toFIGS. 1-10 . As can be seen inFIG. 11 , thescrew cap 140 is captured and retained in the tapered bore 38 of theglenosphere component 12 by a retainingring 160. To do so, thescrew cap 140 of the design ofFIGS. 11-13 includes a cylindrically-shapedsurface 162 that mates at one end with the annular-shapedbeveled surface 152 of the screw cap'slocking flange 142 and at its opposite end with anannular retaining flange 164. The retainingring 160 is captured on the cylindrically-shapedsurface 162 of thescrew cap 140. That is, the cylindrically-shapedsurface 162 of thescrew cap 140 is positioned in the retaining ring'sopening 166. As can be seen inFIGS. 11 and 12 , the inner diameter of the retaining ring 160 (i.e., the diameter of its opening 166) is greater than the diameter of the cylindrically-shapedsurface 162 of thescrew cap 140, but less than the diameter of the screw cap'sretaining flange 164. The outer diameter of the retaining ring 160 (i.e., the diameter of its outer surface 168) is greater than the diameter of the screw cap's retaining flange 16 and is sized and configured to be press fit, welded (or press fit and welded), or taper locked to the taperedsidewalls 40 defining the glenosphere component's taperedbore 38. As such, when assembled, the retainingring 160 captures thescrew cap 140 in the glenosphere component's taperedbore 38. So captured, both free rotation and limited linear movement of thescrew cap 140 relative to theglenosphere component 12 are allowed, but it is prevented from escaping the glenosphere component's taperedbore 38. - The design of
FIGS. 11-13 may be installed in a similar manner to as described above in regard to the design ofFIGS. 8-10 . In particular, themetaglene component 14 may first be implanted into the surgically-preparedglenoid surface 20 of the patient'sscapula 22 by positioning it at the desired location and orientation, and thereafter fixing it in place by inserting one or more compression screw(s) 130 through the screw holes 114 and driving them into the bone tissue. Once the compression screws 114 have been seated, the surgeon may then install theglenosphere component 12, and hence thescrew cap 140 captured therein, by inserting the screw cap's threadedshaft 144 into the threaded bore 110 of the metaglene component'sstem 104. Thereafter, the drive tip of a hex driver (not shown) may be advanced through the glenosphere component'sinstallation hole 44 and into the screw cap'sdrive socket 148. The surgeon then rotates thescrew cap 140 with the hex driver. Such tightening of thescrew cap 140 urges the annular-shapedbeveled surface 152 of the screw cap'slocking flange 142 into contact with the roundouter edge 136 of eachscrew head 134 of the compression screws 130 installed in themetaglene component 14 thereby asserting a clamping force on the screw heads 134 to resist the compression screws 130 from backing out of the bone tissue of the patient'sscapula 22. Once thescrew cap 140 has been installed, the surgeon may then taper lock theglenosphere component 12 to the implantedmetaglene component 14 in the manner described above. - If the
metaglene component 14 subsequently needs to be removed during, for example, a revision procedure, the surgeon may first remove theglenosphere component 12, and hence the capturedscrew cap 140, from the implantedmetaglene component 14 by inserting the drive tip of a hex driver through the glenosphere component'sinstallation hole 44 and into the screw cap'sdrive socket 148. The surgeon then rotates thescrew cap 140 with the hex driver in a direction opposite to the direction used to install thescrew cap 140. Loosening of the screw cap in such a manner moves the annular-shapedbeveled surface 152 of the screw cap'slocking flange 142 out of contact with the roundouter edge 136 of eachscrew head 134 of the compression screws 130 installed in themetaglene component 14 thereby releasing the clamping force from the screw heads 134. The surgeon may then break the taper lock connection between theglenosphere component 12 and themetaglene component 14 and continue loosening thescrew cap 140 until its threadedshaft 144 escapes the threaded bore 110 of the metaglene component'sstem 104 thereby allowing theglenosphere component 12, and hence thescrew cap 140 captured therein, to be lifted away from themetaglene component 14. Thereafter, the surgeon may use a drive tool (not shown) to remove the compression screws 130. An extraction tool (not shown) may be threaded into the threaded bore 110 of the metaglene component'sstem 104 and thereafter used to extract themetaglene component 14 from the bone tissue of the patient'sscapula 22. - It should be appreciated that the
screw caps 140 described above in regard toFIGS. 8-13 provide efficiency during a surgical procedure to implant themetaglene component 14. For example, thescrew caps 140 allow for implantation of themetaglene component 14 without the use of self-locking surgical screws. Surgical installation of self-locking surgical screws requires the use of a guide wire and other surgical considerations. By providing a locking function, thescrew cap 140 allows compression screws, which are much easier to surgically install, to be used in lieu of self-locking surgical screws. - It should be appreciated that the concepts and features disclosed herein may be used in various combinations with one another or independently of one another. For example, the
elliptical glenosphere component 12 ofFIGS. 1-6 may be used in combination with either themetaglene component 14 ofFIGS. 8-10 or themetaglene component 14 ofFIGS. 11-13 . Moreover, theelliptical glenosphere component 12 ofFIGS. 1-6 may be used in combination with other metaglene components, including metaglene components without thescrew caps 140 described herein. Similarly, themetaglene component 14 ofFIGS. 8-10 may be used in combination with theelliptical glenosphere component 12 ofFIGS. 1-6 , or, alternatively, may be used with a conventional hemispherically-shaped or other type of glenosphere component. Along the same line, themetaglene component 14 ofFIGS. 11-13 may be used in combination with theelliptical glenosphere component 12 ofFIGS. 1-6 , or, alternatively, may be used with a conventional hemispherically-shaped or other type of glenosphere component. - While the disclosure has been illustrated and described in detail in the drawings and foregoing description, such an illustration and description is to be considered as exemplary and not restrictive in character, it being understood that only illustrative embodiments have been shown and described and that all changes and modifications that come within the spirit of the disclosure are desired to be protected.
- There are a plurality of advantages of the present disclosure arising from the various features of the apparatus, system, and method described herein. It will be noted that alternative embodiments of the apparatus, system, and method of the present disclosure may not include all of the features described yet still benefit from at least some of the advantages of such features. Those of ordinary skill in the art may readily devise their own implementations of the apparatus, system, and method that incorporate one or more of the features of the present invention and fall within the spirit and scope of the present disclosure as defined by the appended claims.
Claims (19)
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US13/431,416 US20130261751A1 (en) | 2012-03-27 | 2012-03-27 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
ES15188118.2T ES2613531T3 (en) | 2012-03-27 | 2013-03-20 | Reverse type shoulder orthopedic implant |
EP15188118.2A EP2987466B1 (en) | 2012-03-27 | 2013-03-20 | Reverse shoulder orthopaedic implant |
PCT/US2013/033128 WO2013148438A1 (en) | 2012-03-27 | 2013-03-20 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
JP2015503375A JP6081575B2 (en) | 2012-03-27 | 2013-03-20 | Reverse shoulder orthopedic implant with oval glenoid component |
ES13714466.3T ES2568152T3 (en) | 2012-03-27 | 2013-03-20 | Reverse orthopedic shoulder prosthesis that includes an elliptical glenosphere |
AU2013240117A AU2013240117B2 (en) | 2012-03-27 | 2013-03-20 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
EP13714466.3A EP2830540B1 (en) | 2012-03-27 | 2013-03-20 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
CN201380017206.9A CN104220029B (en) | 2012-03-27 | 2013-03-20 | There is the reverse shoulder orthopaedic implants of ellipsoid joint broad-mouthed receptacle for holding liquid convex supporting head parts |
IN7760DEN2014 IN2014DN07760A (en) | 2012-03-27 | 2014-09-17 | |
US14/560,665 US9532880B2 (en) | 2012-03-27 | 2014-12-04 | Method of implanting a reverse shoulder orthopaedic implant having an elliptical glenosphere component |
US14/560,654 US10265184B2 (en) | 2012-03-27 | 2014-12-04 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
US16/390,475 US11278418B2 (en) | 2012-03-27 | 2019-04-22 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
US17/701,075 US11957594B2 (en) | 2012-03-27 | 2022-03-22 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
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US13/431,416 US20130261751A1 (en) | 2012-03-27 | 2012-03-27 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
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US14/560,654 Division US10265184B2 (en) | 2012-03-27 | 2014-12-04 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
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US14/560,665 Active 2032-04-23 US9532880B2 (en) | 2012-03-27 | 2014-12-04 | Method of implanting a reverse shoulder orthopaedic implant having an elliptical glenosphere component |
US14/560,654 Active 2033-11-03 US10265184B2 (en) | 2012-03-27 | 2014-12-04 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
US16/390,475 Active 2032-06-01 US11278418B2 (en) | 2012-03-27 | 2019-04-22 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
US17/701,075 Active US11957594B2 (en) | 2012-03-27 | 2022-03-22 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
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US14/560,665 Active 2032-04-23 US9532880B2 (en) | 2012-03-27 | 2014-12-04 | Method of implanting a reverse shoulder orthopaedic implant having an elliptical glenosphere component |
US14/560,654 Active 2033-11-03 US10265184B2 (en) | 2012-03-27 | 2014-12-04 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
US16/390,475 Active 2032-06-01 US11278418B2 (en) | 2012-03-27 | 2019-04-22 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
US17/701,075 Active US11957594B2 (en) | 2012-03-27 | 2022-03-22 | Reverse shoulder orthopaedic implant having an elliptical glenosphere component |
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EP (2) | EP2987466B1 (en) |
JP (1) | JP6081575B2 (en) |
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AU (1) | AU2013240117B2 (en) |
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Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
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IT202200020094A1 (en) * | 2022-09-30 | 2024-03-30 | Medacta Int Sa | ANCHORING DEVICE FOR A SHOULDER PROSTHESIS IN REVERSE CONFIGURATION, BONE FIXATION SCREW AND ANCHORING SYSTEM |
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Also Published As
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ES2613531T3 (en) | 2017-05-24 |
JP2015512298A (en) | 2015-04-27 |
EP2987466A1 (en) | 2016-02-24 |
US20220211510A1 (en) | 2022-07-07 |
US20190240035A1 (en) | 2019-08-08 |
EP2987466B1 (en) | 2016-11-16 |
AU2013240117A1 (en) | 2014-11-06 |
US11278418B2 (en) | 2022-03-22 |
ES2568152T3 (en) | 2016-04-27 |
CN104220029A (en) | 2014-12-17 |
US9532880B2 (en) | 2017-01-03 |
US10265184B2 (en) | 2019-04-23 |
AU2013240117B2 (en) | 2017-06-22 |
EP2830540A1 (en) | 2015-02-04 |
JP6081575B2 (en) | 2017-02-15 |
CN104220029B (en) | 2016-10-26 |
EP2830540B1 (en) | 2016-01-13 |
US11957594B2 (en) | 2024-04-16 |
US20150088262A1 (en) | 2015-03-26 |
IN2014DN07760A (en) | 2015-05-15 |
US20150088261A1 (en) | 2015-03-26 |
WO2013148438A1 (en) | 2013-10-03 |
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