US20020022890A1 - Prosthesis structure - Google Patents
Prosthesis structure Download PDFInfo
- Publication number
- US20020022890A1 US20020022890A1 US09/883,251 US88325101A US2002022890A1 US 20020022890 A1 US20020022890 A1 US 20020022890A1 US 88325101 A US88325101 A US 88325101A US 2002022890 A1 US2002022890 A1 US 2002022890A1
- Authority
- US
- United States
- Prior art keywords
- prosthesis structure
- joint
- fixture
- prosthesis
- joint end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- 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
- A61F2/38—Joints for elbows or knees
- A61F2/389—Tibial components
-
- 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
- A61F2/28—Bones
- A61F2002/2835—Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30112—Rounded shapes, e.g. with rounded corners
- A61F2002/30133—Rounded shapes, e.g. with rounded corners kidney-shaped or bean-shaped
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/30199—Three-dimensional shapes
- A61F2002/30224—Three-dimensional shapes cylindrical
- A61F2002/30235—Three-dimensional shapes cylindrical tubular, e.g. sleeves
-
- 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
- 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
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
-
- 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
- A61F2/30767—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
- A61F2002/30795—Blind bores, e.g. of circular cross-section
- A61F2002/30805—Recesses of comparatively large area with respect to their low depth
-
- 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
- A61F2/30767—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
- A61F2002/30879—Ribs
-
- 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
- A61F2/30767—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
- A61F2002/30891—Plurality of protrusions
- A61F2002/30892—Plurality of protrusions parallel
-
- 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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2002/30906—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth shot- sand- or grit-blasted
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
- A61F2230/0015—Kidney-shaped, e.g. bean-shaped
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0069—Three-dimensional shapes cylindrical
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00179—Ceramics or ceramic-like structures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S623/00—Prosthesis, i.e. artificial body members, parts thereof, or aids and accessories therefor
- Y10S623/902—Method of implanting
- Y10S623/908—Bone
Definitions
- the present invention relates to a prosthesis structure for anchorage to a joint end of an articulatory part of a joint in a human or animal body comprising an engagement element which presents a flat or substantially flat engagement surface for engagement with a complementary joint end surface provided at the joint end and an elongate fixture connected to and spaced from the engagement surface for insertion into a complementary bore provided at the joint end at a distance from the joint end surface (a “prosthesis of the type defined”).
- Prosthesis structures of the type defined are known for use in human knee-joint replacement surgery from prior patent application publications FR-A-2630639 (Le Beguec) and WO93/22990 (Astra AB) with the prosthesis structures made known therein being for anchorage in the knee-joint end of a human tibia or femur respectively.
- the longitudinal axis of the fixture is oriented parallel to the engagement surface.
- WO93/22990 the contents of which are incorporated herein by reference, further discloses orienting the fixture at an angle to the main articulation plane of the knee-joint which extends between the extension or anterior side of the joint and the flexion or posterior side of the joint.
- the aim of the present invention is to adapt the relation between the elongate fixture and the engagement surface of a prosthesis of the type defined for improving the anchorability of the prosthesis structure.
- a prosthesis of the type defined in which the elongate fixture forms an acute angle with the engagement surface is provided. Consequently, by providing the bore with a longitudinal axis which in a predetermined insertion direction is inclined away from the joint end surface at an acute angle which corresponds closely to that formed between the elongate fixture and the engagement surface, the elongate fixture may be inserted into the bore in the predetermined insertion direction such that the elongate surface successively approaches the joint end surface by leading with the end of the elongate fixture spaced farthest from the engagement surface.
- the bore and the joint end surface may be formed at such a distance from each other compared to the distance between the engagement surface and the elongate fixture that the engagement surface of the prosthesis structure is brought into a first contact with the joint end surface at an intermediary insertion position which is short of a final anchored position.
- the prosthesis structure will therefore need to be forcibly displaced from the intermediary insertion position in a direction generally parallel with the joint end surface to arrive at the final anchored position.
- a press-fit and pretensioning forces are thereby obtained between the bone and prosthesis structure resulting in high rotational and lateral stability for the anchored prosthesis structure.
- Good anchorage for the prosthesis structure to the joint end may therefore be achieved without the use of other fastening means, such as screws and bolts.
- the acute angle between the elongate fixture and the engagement surface is preferably in the range of 1° to 5° with the range of 1° to 3° being particularly preferred.
- the elongate fixture is a first elongate fixture and the prosthesis structure comprises one or more further elongate fixtures connected to and spaced from the engagement surface for insertion into complementary bores provided in the joint end at a distance from the joint end surface, each further fixture being inclined at an acute angle to the engagement surface and extending generally in parallel with the first elongate fixture.
- the or each fixture may be connected to the engagement surface by one or more rib elements.
- an insertion end portion of the or each fixture is of a reduced cross section. This may be achieved by bevelling the insertion end portion on a side facing towards the engagement surface in which case the insertion end portion is preferably bevelled to such a degree that the side of the insertion end portion facing towards the engagement surface forms an angle with the corresponding side of the remaining portion of the fixture in the range of 1° to 4° with an angle of approximately 2° being particularly preferred.
- the engagement surface is provided with one or more bone tissue receiving cavities which are adapted to receive bone tissue from the joint end surface on anchorage of the prosthesis structure to the joint end.
- the bone tissue receiving cavities may comprise one or more longitudinal grooves formed in the engagement surface to extend generally in the direction of the or each fixture.
- each elongate fixture extends between opposed sides of the engagement element at an inclined angle to the general direction in which the opposed sides extend.
- the or each fixture may present a smooth, continuous peripheral surface.
- the or each fixture may be provided with axially extending splines as described in WO93/22990 supra.
- one or more of the surfaces of the prosthesis structure which contact bone tissue when the prosthesis structure is anchored are subjected to a surface treatment for enhancing osseointegration.
- a surface treatment for enhancing osseointegration there may be mentioned blasting of the bone contacting surfaces.
- the engagement element and the or each fixture may be formed in one-piece.
- the prosthesis structure is an anchoring component part of a joint prosthesis assembly for partial or total replacement of the joint end of the articulatory part of the joint.
- the engagement element may be a plate-like element having a first major surface forming the engagement surface and a second opposite major surface for supporting a further component part or parts of the joint prosthesis assembly.
- the prosthesis structure is adapted for anchorage to the joint end of one of the articulatory parts of a human or animal knee-joint.
- FIG. 1 is a perspective view of a knee-joint prosthesis assembly including a prosthesis structure according to a first embodiment of the invention comprising a plate-like engagement element from which two rod-shaped fixtures having a bevelled end depend.
- FIG. 2 is a perspective side view of the knee-joint prosthesis assembly in FIG. 1.
- FIG. 3 is a bottom plan view of the prosthesis structure of the knee-joint prosthesis assembly in FIG. 1.
- FIG. 4 is a side elevation view of the prosthesis structure of the knee-joint prosthesis assembly in FIG. 1.
- FIG. 5 a is a side view, partly in cross-section, of the prosthesis structure of the knee-joint prosthesis assembly in FIG. 1 positioned in an intermediary insertion position during the fitting thereof in the prepared bone tissue at the condylar end of a tibia.
- FIG. 5 b is a view in the direction of arrow A in FIG. 5 a.
- FIG. 5 c is a cut-away perspective view in the general direction of arrow A in FIG. 5 a.
- FIG. 6 a is a side view, partly in cross-section, of the prosthesis structure of the knee-joint prosthesis assembly in FIG. 1 in a fully inserted, anchored position at the condylar end of the tibia.
- FIG. 6 b is a view in the direction of arrow B in FIG. 6 a.
- FIG. 6 c is a partly cut-away perspective view in the general direction of arrow B in FIG. 6 a.
- FIG. 7 is a side view, partly in cross-section, of a prosthesis structure for a knee-joint prosthesis assembly according to a second embodiment of the invention which corresponds to the first embodiment in FIGS. 1 - 6 other than that the ends of the rod-shaped fixtures are not bevelled.
- FIGS. 1 - 4 there is shown a bi-condylar knee-joint prosthesis assembly 2 for the tibial side of a knee-joint comprising a prosthesis structure or anchoring component 1 for anchorage to the knee-joint end of a tibia in accordance with the invention.
- the prosthesis structure 1 is a one-piece component made from titanium and comprises a plate-like engagement element 3 of non-symmetrical form due to the non-symmetrical nature of the condyles at the knee-joint end of the tibia.
- the engagement element 3 has a flat upper surface 3 a and a flat lower engagement surface 3 b for engagement with a complementary bone tissue surface formed at the knee-joint end of the tibia by resection of the condyles, as will be described in more detail hereinafter.
- the prosthesis structure 1 further comprises first and second elongate, parallel rod-shaped fixtures 4 , 5 for sliding insertion in an anteroposterior direction into complementary bores drilled between the anterior and posterior sides of the knee-joint end of the tibia at a distance beneath the bone tissue surface formed by resection of the condyles, as will also be described in more detail hereinafter.
- the first and second fixtures 4 , 5 have a smooth, continuous peripheral surface and are connected to the engagement surface 3 b of the plate-like engagement element 3 at a spaced distance therefrom by first and second ribs 6 , 7 .
- each of the first and second rod-shaped fixtures 4 , 5 forms an acute angle ⁇ with the engagement surface 3 b meaning that each fixture has one end (the “leading end”) spaced farther from the engagement surface than the other end (the “trailing end”).
- the acute angle ⁇ formed between the first and second fixtures 4 , 5 and the engagement surface 3 b is in the range of 1° to 5 °, preferably approximately 2°.
- the leading end of the first fixture 4 is presented by a leading end portion 4 a which is of reduced cross-section due to it being bevelled on the upper side facing towards the engagement surface 3 b .
- the bevelled upper side of the leading end portion 4 a forms an angle 8 with a corresponding upper side of a mid portion 4 b of the first fixture and a trailing end portion 4 c of the first fixture 4 which presents the trailing end thereof.
- the bevelled tipper side of the leading end portion 4 a forms an angle ⁇ with the corresponding upper sides of the mid and trailing end portions 4 b , 4 c of the first fixture in the range of 1° to 4°, preferably 2°.
- the second fixture 5 has a correspondingly bevelled leading end portion.
- the trailing ends of the first and second fixtures 4 , 5 are provided with sockets for receiving surgical instruments, e.g. an insertion tool for sliding the first and second fixtures 4 , 5 into the complementary bores 12 , 13 with the bevelled leading end portions thereof leading.
- surgical instruments e.g. an insertion tool for sliding the first and second fixtures 4 , 5 into the complementary bores 12 , 13 with the bevelled leading end portions thereof leading.
- the lower engagement surface 3 b is provided with bone tissue receiving cavities 6 a , 6 b , 7 a , 7 b in the form of longitudinal grooves extending generally in the direction of the first and second fixtures 4 , 5 on either side of the rib elements 6 , 7 .
- the bone tissue receiving cavities 6 a , 6 b , 7 a , 7 b may instead be stepped or angled up from the engagement surface 3 b and their function will be described hereinafter.
- the knee-joint prosthesis assembly 2 also includes an articulating element 8 located on the upper surface 3 a of the plate-like engagement element 3 for supporting a femur condyle of the knee-joint or a complementary articulating element of a knee-joint prosthesis assembly anchored to the femur side of the knee-joint.
- the articulating element 8 comprises a bearing plate 9 mounted on the engagement surface 3 b and a sliding element 10 mounted on the bearing plate 9 .
- the upper surface 3 a of the plate-like element 3 and the lower surface of the bearing plate 9 are adapted such that the bearing plate 9 is either retained immobile on the upper surface 3 a or allowed a specific but restricted movement across the upper surface 3 a .
- the bearing plate 9 may be made of a chromium/cobalt alloy, a chromium/cobalt/molybdenum alloy or a ceramics material.
- the sliding element 10 may be made of a durable plastics material such as ultra high molecular weight polyethylene.
- the patient Prior to performing the procedure for implanting the knee-joint prosthesis assembly 2 , the patient will have undergone a pre-operational X-ray study and planning phase during which the measurements and parameters needed to allow a correct selection of dimensions for the elements of the prosthesis assembly 2 will have been determined.
- the implantation operation may then be carried out using generally the same procedure disclosed in WO 93/22990 supra. Implantation may be carried out in a one-stage operation.
- first and second bores 12 , 13 are drilled through the knee-joint end of the tibia 11 in the anteroposterior direction.
- the anterior or front end of the first bore 12 is denoted 12 a and the posterior or rear end denoted 12 b .
- the diameter of the first and second bores 12 , 13 is such that they closely correspond to the diameters of the first and second fixtures 4 , 5 .
- the first and second bores 12 , 13 are located in relatively healthy bone by virtue of the first and second bores 12 , 13 being offset from the extremity of the knee-joint end of the tibia 11 thereby serving to further promote osseointegration of the first and second fixtures 4 , 5 when inserted into the first and second bores 12 , 13 .
- the osseointegratability of the first and second fixtures 4 , 5 may be further enhanced by roughening or texturing the surfaces thereof, for example by grit blasting. The same surface enlargement treatment could also be applied to the engagement surface 3 b to promote the osseointegratability of that surface.
- the condyles of the tibia 11 are resected to give a bone surface 14 which is of complementary shape to the engagement surface 3 b , as shown in FIG. 5 c .
- the resected bone surface 14 will typically be inclined to horizontal in the anteroposterior direction when the patient stands upright to support the functional motions of the knee-joint.
- the angle of inclination of the resected bone surface 14 to horizontal is in the range of 2° and 9° , preferably approximately 6°.
- first and second slots 15 and 16 are provided between the resected bone surface 14 and the first and second bores 12 , 13 respectively for passage of the first and second rib elements 6 and 7 on insertion of the first and second fixtures 4 , 5 into the first and second bores 12 , 13 .
- the first and second bores 12 , 13 each form an angle with the resected bone surface 14 which corresponds to the angle ⁇ between each of the first and second rod-shaped fixtures 4 , 5 and the flat engagement surface 3 b , the angulation of the first and second bores 12 , 13 being such that the posterior ends of the first and second bores 12 , 13 are spaced farther from the resected bone surface 14 than the anterior ends.
- the engagement surface 3 b of the prosthesis structure 1 will successively approach the resected bone surface 14 as the leading ends of the first and second fixtures 4 , 5 are inserted into the first and second bores 12 , 13 in an anteroposterior direction.
- first and second fixtures 4 , 5 extend between opposing sides of the plate-like engagement element 3 at an inclined angle to the general direction in which the opposed sides extend.
- first and second bores 12 , 13 are correspondingly angled between the anterior and posterior sides 11 a , 11 b of the tibia resulting in the first and second fixtures 4 , forming an angle ⁇ with a main articulation plane P of the knee-joint which extends essentially vertically between the anterior and posterior sides 11 a , 11 b of the tibia 11 when the first and second fixtures 12 , 13 are inserted into the first and second bores 12 , 13 .
- the angle ⁇ with the main articulation plane P of the knee-joint is in the range of 10° to 45°, preferably approximately 20°
- the first and second fixtures 4 , 5 are given different lengths so that (i) the first and second fixtures 4 , 5 enter the anterior ends of the first and second bores 12 , 13 at substantially the same time, (ii) emerge from the posterior ends of the first and second bores 12 , 13 at substantially the same time, and (iii) preferably do not project from the anterior ends of the first and second bores 12 , 13 in a final anchored position of the prosthesis structure 1 .
- FIG. 4 shows that the leading end portion 4 a of the first fixture 4 is spaced from the engagement surface 3 b of the plate-like engagement element 3 by a predetermined distance D 2 .
- D 2 the distance between the anterior and posterior ends of the first and second bores 12 , 13 is spaced from the resected bone surface 14 by a predetermined distance D 1 which is equal to the distance D 2 between the engagement surface 3 b and the leading end portions of the first and second rod-shaped fixtures 4 , 5 .
- D 1 is equal to the distance D 2 between the engagement surface 3 b and the leading end portions of the first and second rod-shaped fixtures 4 , 5 .
- the result of this dimensioning is that the engagement surface 3 b of the engagement element 3 of the prosthesis structure 1 is brought into a first contact with the resected bone surface 14 at an intermediate insertion position short of the final anchored position.
- FIGS. 5 a - c The intermediate insertion position of the prosthesis structure 1 is shown in FIGS. 5 a - c from which it will be appreciated that movement of the prosthesis structure 1 from the intermediate insertion position to the final anchored position shown in FIGS. 6 a - c will be counteracted by a wedge compression effect because the resected bone surface 14 is spaced from the posterior ends of the first and second bores 12 , 13 by a predetermined distance D 3 which is greater than the predetermined distance D 2 due to the first and second bores 12 , 13 being inclined at an angle to the resected bone surface 14 .
- the difference between the predetermined distances D 3 and D 2 will typically be within the range of 0.1 to 0.9 mm with a difference of approximately 0.35 mm being preferred.
- the predetermined distance D 3 may be approximately 10 mm. It will be gathered from the foregoing that the prosthesis structure 1 has to be forcibly displaced from the intermediate insertion position in a direction essentially parallel with the resected bone surface 14 to arrive at the final anchored position illustrated in FIGS. 6 a - c to overcome the wedge compression effect.
- the wedge compression effect results in bone tissue from the resected bone surface 14 being forced into the bone tissue receiving cavities 6 a , 6 b , 7 a , 7 b in the engagement surface 3 b of the engagement element 3 as the prosthesis structure 1 is forcibly displaced from the intermediate insertion position to the final anchored position.
- the wedge compression effect results in the resected bone surface 14 being compressed against the engagement surface 3 b . This creates pretensioning forces between the engagement surface 3 b and the resected bone surface 14 and also between the upper sides of the first and second rod-shaped fixtures 4 , 5 and the bone tissue in the first and second bores 12 , 13 .
- the prosthesis structure 1 may be anchored in the tibia 11 by a press-fit and pretensioning forces alone, that is to say, without the need for using any other fastening means such as screws and bolts.
- the prosthesis structure 1 will also have a high rotational and lateral stability in the final anchored position due to the wedge compression effect.
- first (and second fixture) 4 has an leading end portion 4 a ′ which is not bevelled.
- the unbevelled leading end portion 4 a ′ digs itself into the bone and creates a pressure in front of it which may result in a splitting of the posterior cortical bone and a loss of the pretensioning forces in a posterior part of the anchored prosthesis structure 1 .
- the fixtures could be splined as shown in WO 93/22990 supra or slotted to increase the interference thereof with bone tissue.
- the engagement surface of the engagement element may likewise be splined as shown in WO 93/22990 for increasing stability.
- more than two fixtures could be used if desired and in a basic form of the invention only a single fixture is used.
- the bone tissue receiving cavities provided in the engagement surface could also be omitted without detracting from the invention.
- prosthesis structures in accordance with the invention may be used at the femur side of a knee-joint or at a joint member of another human or animal joint.
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Physical Education & Sports Medicine (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Graft Or Block Polymers (AREA)
Abstract
A prosthesis structure (1) for anchorage to the joint end of an articulatory part of a joint (11) in a human or animal body comprises an engagement element (3) which presents a flat or substantially flat engagement surface (3 b) for engaging with a complementary joint end surface (14) provided at the joint end and an elongate fixture (4) connected to and spaced from the engagement surface for insertion into a complementary bore (12) provided at the joint end at a distance from the joint end surface (14). The elongate fixture forms an acute angle (β) with the engagement surface (3 b).
Description
- The present invention relates to a prosthesis structure for anchorage to a joint end of an articulatory part of a joint in a human or animal body comprising an engagement element which presents a flat or substantially flat engagement surface for engagement with a complementary joint end surface provided at the joint end and an elongate fixture connected to and spaced from the engagement surface for insertion into a complementary bore provided at the joint end at a distance from the joint end surface (a “prosthesis of the type defined”).
- Prosthesis structures of the type defined are known for use in human knee-joint replacement surgery from prior patent application publications FR-A-2630639 (Le Beguec) and WO93/22990 (Astra AB) with the prosthesis structures made known therein being for anchorage in the knee-joint end of a human tibia or femur respectively. In the prosthesis structures of FR-A-2630639 and W093/22990 the longitudinal axis of the fixture is oriented parallel to the engagement surface. WO93/22990, the contents of which are incorporated herein by reference, further discloses orienting the fixture at an angle to the main articulation plane of the knee-joint which extends between the extension or anterior side of the joint and the flexion or posterior side of the joint.
- The aim of the present invention is to adapt the relation between the elongate fixture and the engagement surface of a prosthesis of the type defined for improving the anchorability of the prosthesis structure.
- According to the invention there is provided a prosthesis of the type defined in which the elongate fixture forms an acute angle with the engagement surface. Consequently, by providing the bore with a longitudinal axis which in a predetermined insertion direction is inclined away from the joint end surface at an acute angle which corresponds closely to that formed between the elongate fixture and the engagement surface, the elongate fixture may be inserted into the bore in the predetermined insertion direction such that the elongate surface successively approaches the joint end surface by leading with the end of the elongate fixture spaced farthest from the engagement surface. Moreover, the bore and the joint end surface may be formed at such a distance from each other compared to the distance between the engagement surface and the elongate fixture that the engagement surface of the prosthesis structure is brought into a first contact with the joint end surface at an intermediary insertion position which is short of a final anchored position. As a result, further movement of the prosthesis structure towards the final anchored position will be counteracted by a wedge compression effect and the prosthesis structure will therefore need to be forcibly displaced from the intermediary insertion position in a direction generally parallel with the joint end surface to arrive at the final anchored position. A press-fit and pretensioning forces are thereby obtained between the bone and prosthesis structure resulting in high rotational and lateral stability for the anchored prosthesis structure. Good anchorage for the prosthesis structure to the joint end may therefore be achieved without the use of other fastening means, such as screws and bolts.
- The acute angle between the elongate fixture and the engagement surface is preferably in the range of 1° to 5° with the range of 1° to 3° being particularly preferred.
- In an embodiment of the invention such as the one hereinafter to be described the elongate fixture is a first elongate fixture and the prosthesis structure comprises one or more further elongate fixtures connected to and spaced from the engagement surface for insertion into complementary bores provided in the joint end at a distance from the joint end surface, each further fixture being inclined at an acute angle to the engagement surface and extending generally in parallel with the first elongate fixture.
- The or each fixture may be connected to the engagement surface by one or more rib elements.
- In an embodiment of the invention such as the one hereinafter to be described an insertion end portion of the or each fixture is of a reduced cross section. This may be achieved by bevelling the insertion end portion on a side facing towards the engagement surface in which case the insertion end portion is preferably bevelled to such a degree that the side of the insertion end portion facing towards the engagement surface forms an angle with the corresponding side of the remaining portion of the fixture in the range of 1° to 4° with an angle of approximately 2° being particularly preferred.
- In an embodiment of the invention such as the one hereinafter to be described the engagement surface is provided with one or more bone tissue receiving cavities which are adapted to receive bone tissue from the joint end surface on anchorage of the prosthesis structure to the joint end. The bone tissue receiving cavities may comprise one or more longitudinal grooves formed in the engagement surface to extend generally in the direction of the or each fixture.
- In an embodiment of the invention such as the one hereinafter to be described the or each elongate fixture extends between opposed sides of the engagement element at an inclined angle to the general direction in which the opposed sides extend.
- The or each fixture may present a smooth, continuous peripheral surface. Alternately, the or each fixture may be provided with axially extending splines as described in WO93/22990 supra.
- In an embodiment of the invention one or more of the surfaces of the prosthesis structure which contact bone tissue when the prosthesis structure is anchored are subjected to a surface treatment for enhancing osseointegration. As an example, there may be mentioned blasting of the bone contacting surfaces.
- For convenience, the engagement element and the or each fixture may be formed in one-piece.
- In an embodiment of the invention such as the one hereinafter to be described the prosthesis structure is an anchoring component part of a joint prosthesis assembly for partial or total replacement of the joint end of the articulatory part of the joint. To this end, the engagement element may be a plate-like element having a first major surface forming the engagement surface and a second opposite major surface for supporting a further component part or parts of the joint prosthesis assembly.
- In an embodiment of the invention such as the one hereinafter to be described the prosthesis structure is adapted for anchorage to the joint end of one of the articulatory parts of a human or animal knee-joint.
- By way of example, embodiments of the invention will now be described with reference to the accompanying Figures of drawings in which:
- FIG. 1 is a perspective view of a knee-joint prosthesis assembly including a prosthesis structure according to a first embodiment of the invention comprising a plate-like engagement element from which two rod-shaped fixtures having a bevelled end depend.
- FIG. 2 is a perspective side view of the knee-joint prosthesis assembly in FIG. 1.
- FIG. 3 is a bottom plan view of the prosthesis structure of the knee-joint prosthesis assembly in FIG. 1.
- FIG. 4 is a side elevation view of the prosthesis structure of the knee-joint prosthesis assembly in FIG. 1.
- FIG. 5a is a side view, partly in cross-section, of the prosthesis structure of the knee-joint prosthesis assembly in FIG. 1 positioned in an intermediary insertion position during the fitting thereof in the prepared bone tissue at the condylar end of a tibia.
- FIG. 5b is a view in the direction of arrow A in FIG. 5a.
- FIG. 5c is a cut-away perspective view in the general direction of arrow A in FIG. 5a.
- FIG. 6a is a side view, partly in cross-section, of the prosthesis structure of the knee-joint prosthesis assembly in FIG. 1 in a fully inserted, anchored position at the condylar end of the tibia.
- FIG. 6b is a view in the direction of arrow B in FIG. 6a.
- FIG. 6c is a partly cut-away perspective view in the general direction of arrow B in FIG. 6a.
- FIG. 7 is a side view, partly in cross-section, of a prosthesis structure for a knee-joint prosthesis assembly according to a second embodiment of the invention which corresponds to the first embodiment in FIGS.1-6 other than that the ends of the rod-shaped fixtures are not bevelled.
- In the Figures of drawings like numbers are used to indicate like parts in the two embodiments.
- In FIGS.1-4 there is shown a bi-condylar knee-joint prosthesis assembly 2 for the tibial side of a knee-joint comprising a prosthesis structure or
anchoring component 1 for anchorage to the knee-joint end of a tibia in accordance with the invention. - The
prosthesis structure 1 is a one-piece component made from titanium and comprises a plate-like engagement element 3 of non-symmetrical form due to the non-symmetrical nature of the condyles at the knee-joint end of the tibia. Theengagement element 3 has a flatupper surface 3 a and a flatlower engagement surface 3 b for engagement with a complementary bone tissue surface formed at the knee-joint end of the tibia by resection of the condyles, as will be described in more detail hereinafter. - The
prosthesis structure 1 further comprises first and second elongate, parallel rod-shaped fixtures second fixtures engagement surface 3 b of the plate-like engagement element 3 at a spaced distance therefrom by first andsecond ribs - Moreover, as illustrated in FIG. 4, each of the first and second rod-
shaped fixtures engagement surface 3 b meaning that each fixture has one end (the “leading end”) spaced farther from the engagement surface than the other end (the “trailing end”). The acute angle β formed between the first andsecond fixtures engagement surface 3 b is in the range of 1° to 5°, preferably approximately 2°. - As shown in FIG. 2, the leading end of the
first fixture 4 is presented by a leadingend portion 4 a which is of reduced cross-section due to it being bevelled on the upper side facing towards theengagement surface 3 b. The bevelled upper side of the leadingend portion 4 a forms an angle 8 with a corresponding upper side of amid portion 4 b of the first fixture and atrailing end portion 4 c of thefirst fixture 4 which presents the trailing end thereof. The bevelled tipper side of the leadingend portion 4 a forms an angle δ with the corresponding upper sides of the mid and trailingend portions second fixture 5 has a correspondingly bevelled leading end portion. - Referring to FIGS. 1 and 2, the trailing ends of the first and
second fixtures second fixtures complementary bores - As shown most clearly in FIG. 3, the
lower engagement surface 3 b is provided with bonetissue receiving cavities second fixtures rib elements tissue receiving cavities engagement surface 3 b and their function will be described hereinafter. - As shown in FIGS. 1 and 2, the knee-joint prosthesis assembly2 also includes an articulating element 8 located on the
upper surface 3 a of the plate-like engagement element 3 for supporting a femur condyle of the knee-joint or a complementary articulating element of a knee-joint prosthesis assembly anchored to the femur side of the knee-joint. The articulating element 8 comprises a bearing plate 9 mounted on theengagement surface 3 b and a slidingelement 10 mounted on the bearing plate 9. Theupper surface 3 a of the plate-like element 3 and the lower surface of the bearing plate 9 are adapted such that the bearing plate 9 is either retained immobile on theupper surface 3 a or allowed a specific but restricted movement across theupper surface 3 a. The bearing plate 9 may be made of a chromium/cobalt alloy, a chromium/cobalt/molybdenum alloy or a ceramics material. The slidingelement 10 may be made of a durable plastics material such as ultra high molecular weight polyethylene. - Prior to performing the procedure for implanting the knee-joint prosthesis assembly2, the patient will have undergone a pre-operational X-ray study and planning phase during which the measurements and parameters needed to allow a correct selection of dimensions for the elements of the prosthesis assembly 2 will have been determined. The implantation operation may then be carried out using generally the same procedure disclosed in WO 93/22990 supra. Implantation may be carried out in a one-stage operation.
- As shown in FIGS. 5a-5 c, first and
second bores tibia 11 in the anteroposterior direction. The anterior or front end of thefirst bore 12 is denoted 12 a and the posterior or rear end denoted 12 b. The diameter of the first andsecond bores second fixtures second bores second bores tibia 11 thereby serving to further promote osseointegration of the first andsecond fixtures second bores second fixtures engagement surface 3 b to promote the osseointegratability of that surface. - After the drilling operation, the condyles of the
tibia 11 are resected to give abone surface 14 which is of complementary shape to theengagement surface 3 b, as shown in FIG. 5c. The resectedbone surface 14 will typically be inclined to horizontal in the anteroposterior direction when the patient stands upright to support the functional motions of the knee-joint. The angle of inclination of the resectedbone surface 14 to horizontal is in the range of 2° and 9° , preferably approximately 6°. Referring to FIG. 5b, first andsecond slots bone surface 14 and the first andsecond bores second rib elements second fixtures second bores - As shown in FIG. 5a, the first and
second bores bone surface 14 which corresponds to the angle β between each of the first and second rod-shapedfixtures flat engagement surface 3 b, the angulation of the first andsecond bores second bores bone surface 14 than the anterior ends. For this reason, theengagement surface 3 b of theprosthesis structure 1 will successively approach the resectedbone surface 14 as the leading ends of the first andsecond fixtures second bores - It will be noted from FIG. 3 that the first and
second fixtures like engagement element 3 at an inclined angle to the general direction in which the opposed sides extend. As can be seen from FIG. 5c, the first andsecond bores posterior sides second fixtures 4, forming an angle α with a main articulation plane P of the knee-joint which extends essentially vertically between the anterior andposterior sides tibia 11 when the first andsecond fixtures second bores - In view of the first and
second fixtures tibia 11 at an angle α to the main articulation plane P, the first andsecond fixtures second fixtures second bores second bores second bores prosthesis structure 1. - FIG. 4 shows that the
leading end portion 4 a of thefirst fixture 4 is spaced from theengagement surface 3 b of the plate-like engagement element 3 by a predetermined distance D2. This is further the case for the second fixture 5 (not shown). Referring now to FIG. 5a, it can be seen that the first andsecond bores bone surface 14 that an intermediary position between the anterior and posterior ends of the first andsecond bores bone surface 14 by a predetermined distance D1 which is equal to the distance D2 between theengagement surface 3 b and the leading end portions of the first and second rod-shapedfixtures engagement surface 3 b of theengagement element 3 of theprosthesis structure 1 is brought into a first contact with the resectedbone surface 14 at an intermediate insertion position short of the final anchored position. - The intermediate insertion position of the
prosthesis structure 1 is shown in FIGS. 5a-cfrom which it will be appreciated that movement of theprosthesis structure 1 from the intermediate insertion position to the final anchored position shown in FIGS. 6a-c will be counteracted by a wedge compression effect because the resectedbone surface 14 is spaced from the posterior ends of the first andsecond bores second bores bone surface 14. The difference between the predetermined distances D3 and D2 will typically be within the range of 0.1 to 0.9 mm with a difference of approximately 0.35 mm being preferred. As an example, the predetermined distance D3 may be approximately 10 mm. It will be gathered from the foregoing that theprosthesis structure 1 has to be forcibly displaced from the intermediate insertion position in a direction essentially parallel with the resectedbone surface 14 to arrive at the final anchored position illustrated in FIGS. 6a-c to overcome the wedge compression effect. - As illustrated in FIGS. 6a-c, the wedge compression effect results in bone tissue from the resected
bone surface 14 being forced into the bonetissue receiving cavities engagement surface 3 b of theengagement element 3 as theprosthesis structure 1 is forcibly displaced from the intermediate insertion position to the final anchored position. Moreover, the wedge compression effect results in the resectedbone surface 14 being compressed against theengagement surface 3 b. This creates pretensioning forces between theengagement surface 3 b and the resectedbone surface 14 and also between the upper sides of the first and second rod-shapedfixtures second bores prosthesis structure 1 may be anchored in thetibia 11 by a press-fit and pretensioning forces alone, that is to say, without the need for using any other fastening means such as screws and bolts. Theprosthesis structure 1 will also have a high rotational and lateral stability in the final anchored position due to the wedge compression effect. - The reason for bevelling the leading end portions of the first and
second fixtures leading end portion 4 a′ which is not bevelled. During displacement of theprosthesis structure 1 from the intermediate insertion position to the final anchored position the unbevelledleading end portion 4 a′ digs itself into the bone and creates a pressure in front of it which may result in a splitting of the posterior cortical bone and a loss of the pretensioning forces in a posterior part of the anchoredprosthesis structure 1. - Several modifications of the embodiments described above with reference to the Figures of drawings are conceivable within the ambit of the invention. For example, instead of having a smooth continuous surface the fixtures could be splined as shown in WO 93/22990 supra or slotted to increase the interference thereof with bone tissue. The engagement surface of the engagement element may likewise be splined as shown in WO 93/22990 for increasing stability. In addition, more than two fixtures could be used if desired and in a basic form of the invention only a single fixture is used. The bone tissue receiving cavities provided in the engagement surface could also be omitted without detracting from the invention. Moreover, it will be appreciated by those versed in the art that prosthesis structures in accordance with the invention may be used at the femur side of a knee-joint or at a joint member of another human or animal joint.
Claims (15)
1. A prosthesis structure (1) for anchorage to a joint end of an articulatory part (11) of a joint in a human or animal body comprising an engagement element (3) which presents a flat or substantially flat engagement surface (3 b) for engaging with a complementary joint end surface (14) provided at said joint end and an elongate fixture (4) connected to and spaced from the engagement surface for insertion into a complementary bore (12) provided at said joint end at a distance from said joint end surface (14) characterised in that the elongate fixture (4) forms an acute angle (β) with the engagement surface (3 b).
2. A prosthesis structure as claimed in claim 1 , characterised in that said acute angle (β) is greater than or equal to 1°.
3. A prosthesis structure as claimed in claim 1 or 2, characterised in that said acute angle (β) is less than or equal to 5°.
4. A prosthesis structure as claimed in any one of claims 1 to 3 , characterised in that said acute angle (β) is within the range of 1° to 3°.
5. A prosthesis structure as claimed in any one of the preceding claims, characterised in that the elongate fixture is a first elongate fixture (4) and that the structure (1) comprises one or more further corresponding elongate fixtures (5) extending generally in parallel with said first elongate fixture (4) for insertion into a corresponding number of further complementary bores (13) provided in said joint end at a distance from said joint end surface (14).
6. A prosthesis structure as claimed in any one of the preceding claims, characterised in that an insertion end portion (4 a) of the or each fixture (4, 5) is of a reduced cross-section.
7. A prosthesis structure as claimed in claim 6 , characterised in that the or each insertion end portion (4 a) is bevelled on a side facing the engagement surface (3 b) for obtaining said reduced cross section.
8. A prosthesis structure as claimed in claim 7 , characterised in that the or each insertion end portion (4 a) is bevelled to such a degree that the side of the insertion end portion facing the engagement surface (3 b) forms an angle (δ) with the corresponding side of the remaining portion (4 b, 4 c) of the fixture (4, 5) in the range of 1° to 4°.
9. A prosthesis structure as claimed in claim 8 , characterised in that the angle (δ) between the bevelled side of the or each insertion end portion (4 a) and the corresponding side of the remaining portion (4 b, 4 c) of the fixture (4, 5) is approximately 2°.
10. A prosthesis structure as claimed in any one of the preceding claims, characterised in that the engagement surface (3 b) is provided with one or more bone tissue receiving cavities (6 a, 6 b, 7 a, 7 b) which are adapted to receive bone tissue of the joint end surface on anchorage of the prosthesis structure to the joint end.
11. A prosthesis structure as claimed in claim 10 , characterised in that the or each bone tissue receiving cavity (6 a, 6 b, 7 a, 7 b) is in the form of a longitudinal groove formed in the engagement surface (3 b) which extends generally in the direction of the or each fixture (4, 5).
12. A prosthesis structure as claimed in any one of the preceding claims, characterised in that the or each elongate fixture (4, 5) extends between opposed sides of the engagement element (3) at an inclined angle relative to the general direction in which the opposed sides extend.
13. A prosthesis structure as claimed in any one of the preceding claims, characterised in that the prosthesis structure (1) is an anchoring component part of a joint prosthesis assembly (2) for partial or total replacement of the joint end of the articulatory part (11) of the joint.
14. A prosthesis structure as claimed in any one of the preceding claims, characterised in that the prosthesis structure (1) is adapted for anchorage to the knee-joint end of one of the articulatory parts (11) of a human or animal knee-joint.
15. A prosthesis structure (1) for anchorage to a joint end of an articulatory part of a joint in a human or animal body substantially as hereinbefore described with reference to the accompanying Figures of drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/684,922 US7250061B2 (en) | 1998-12-22 | 2003-10-14 | Method of anchoring a prosthesis structure |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9804492A SE9804492D0 (en) | 1998-12-22 | 1998-12-22 | A prosthesis structure |
SE9804492-8 | 1998-12-22 | ||
PCT/SE1999/002464 WO2000036998A1 (en) | 1998-12-22 | 1999-12-21 | A prosthesis structure |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1999/002464 Continuation WO2000036998A1 (en) | 1998-12-22 | 1999-12-21 | A prosthesis structure |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/684,922 Continuation US7250061B2 (en) | 1998-12-22 | 2003-10-14 | Method of anchoring a prosthesis structure |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020022890A1 true US20020022890A1 (en) | 2002-02-21 |
Family
ID=20413814
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/883,251 Abandoned US20020022890A1 (en) | 1998-12-22 | 2001-06-18 | Prosthesis structure |
US10/684,922 Expired - Fee Related US7250061B2 (en) | 1998-12-22 | 2003-10-14 | Method of anchoring a prosthesis structure |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/684,922 Expired - Fee Related US7250061B2 (en) | 1998-12-22 | 2003-10-14 | Method of anchoring a prosthesis structure |
Country Status (11)
Country | Link |
---|---|
US (2) | US20020022890A1 (en) |
EP (1) | EP1139927B1 (en) |
JP (1) | JP2002532191A (en) |
KR (1) | KR20020015682A (en) |
CN (1) | CN1178630C (en) |
AT (1) | ATE288237T1 (en) |
AU (1) | AU743145B2 (en) |
CA (1) | CA2356979A1 (en) |
DE (1) | DE69923589D1 (en) |
SE (1) | SE9804492D0 (en) |
WO (1) | WO2000036998A1 (en) |
Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030158606A1 (en) * | 2002-02-20 | 2003-08-21 | Coon Thomas M. | Knee arthroplasty prosthesis and method |
US6620199B2 (en) * | 2001-07-13 | 2003-09-16 | Ronald P. Grelsamer | Device for reinforcing bone in partial knee replacement surgery |
US20030225457A1 (en) * | 2002-05-24 | 2003-12-04 | Justin Daniel F. | Femoral components for knee arthroplasty |
US20040102852A1 (en) * | 2002-11-22 | 2004-05-27 | Johnson Erin M. | Modular knee prosthesis |
US20060111787A1 (en) * | 2004-11-05 | 2006-05-25 | Bailie David S | Glenoid prosthesis and method of implanting same |
US7150761B2 (en) | 2002-05-24 | 2006-12-19 | Medicinelodge, Inc. | Modular femoral components for knee arthroplasty |
US20110144757A1 (en) * | 2007-09-17 | 2011-06-16 | Linares Medical Devices, Llc | Artificial joint support between first and second bones |
US8157869B2 (en) | 2007-01-10 | 2012-04-17 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US8163028B2 (en) | 2007-01-10 | 2012-04-24 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US8187280B2 (en) | 2007-10-10 | 2012-05-29 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US8328873B2 (en) | 2007-01-10 | 2012-12-11 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US8562616B2 (en) | 2007-10-10 | 2013-10-22 | Biomet Manufacturing, Llc | Knee joint prosthesis system and method for implantation |
US20140155902A1 (en) * | 2006-07-17 | 2014-06-05 | Arthrosurface, Inc. | Tibial Resurfacing System and Method |
US8852195B2 (en) | 2004-07-09 | 2014-10-07 | Zimmer, Inc. | Guide templates for surgical implants and related methods |
US9066716B2 (en) | 2011-03-30 | 2015-06-30 | Arthrosurface Incorporated | Suture coil and suture sheath for tissue repair |
US9204873B2 (en) | 2000-05-01 | 2015-12-08 | Arthrosurface Incorporated | System and method for joint resurface repair |
US20160008136A1 (en) * | 2014-07-08 | 2016-01-14 | Zimmer, Inc. | Intercondylar component and fin attachment features for use in knee arthroplasty |
US9283076B2 (en) | 2009-04-17 | 2016-03-15 | Arthrosurface Incorporated | Glenoid resurfacing system and method |
US9351745B2 (en) | 2003-02-24 | 2016-05-31 | Arthrosurface Incorporated | Trochlear resurfacing system and method |
US9357989B2 (en) | 2000-05-01 | 2016-06-07 | Arthrosurface Incorporated | System and method for joint resurface repair |
US9358029B2 (en) | 2006-12-11 | 2016-06-07 | Arthrosurface Incorporated | Retrograde resection apparatus and method |
US9468448B2 (en) | 2012-07-03 | 2016-10-18 | Arthrosurface Incorporated | System and method for joint resurfacing and repair |
US9492200B2 (en) | 2013-04-16 | 2016-11-15 | Arthrosurface Incorporated | Suture system and method |
US9585759B2 (en) | 2008-06-27 | 2017-03-07 | Zimmer, Inc. | ACL accommodating tibial design |
US9662126B2 (en) | 2009-04-17 | 2017-05-30 | Arthrosurface Incorporated | Glenoid resurfacing system and method |
US9861492B2 (en) | 2014-03-07 | 2018-01-09 | Arthrosurface Incorporated | Anchor for an implant assembly |
US9861372B2 (en) | 2011-05-27 | 2018-01-09 | Howmedica Osteonics Corp. | Prosthetic implant and associated instruments |
US20180153598A1 (en) * | 2016-12-06 | 2018-06-07 | Smed-Ta/Td, Llc | Orthopaedic implant with fixation feature and a method of implanting thereof |
US10076343B2 (en) | 2002-12-03 | 2018-09-18 | Arthrosurface Incorporated | System for articular surface replacement |
US10624748B2 (en) | 2014-03-07 | 2020-04-21 | Arthrosurface Incorporated | System and method for repairing articular surfaces |
US10945743B2 (en) | 2009-04-17 | 2021-03-16 | Arthrosurface Incorporated | Glenoid repair system and methods of use thereof |
CN113271894A (en) * | 2018-12-12 | 2021-08-17 | 兽铁保有限公司 | Animal knee joint implant reflecting animal anatomy structure |
US11160663B2 (en) | 2017-08-04 | 2021-11-02 | Arthrosurface Incorporated | Multicomponent articular surface implant |
US11478358B2 (en) | 2019-03-12 | 2022-10-25 | Arthrosurface Incorporated | Humeral and glenoid articular surface implant systems and methods |
US11607319B2 (en) | 2014-03-07 | 2023-03-21 | Arthrosurface Incorporated | System and method for repairing articular surfaces |
US11712276B2 (en) | 2011-12-22 | 2023-08-01 | Arthrosurface Incorporated | System and method for bone fixation |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8066776B2 (en) * | 2001-12-14 | 2011-11-29 | Btg International Limited | Tibial component |
GB2360457A (en) * | 2000-03-21 | 2001-09-26 | Biomet Merck Ltd | Knee prosthesis with keel |
US7922772B2 (en) * | 2002-05-24 | 2011-04-12 | Zimmer, Inc. | Implants and related methods and apparatus for securing an implant on an articulating surface of an orthopedic joint |
US7771483B2 (en) * | 2003-12-30 | 2010-08-10 | Zimmer, Inc. | Tibial condylar hemiplasty implants, anchor assemblies, and related methods |
US8236060B2 (en) | 2003-12-30 | 2012-08-07 | Zimmer, Inc. | Tethered joint bearing implants and systems |
US7967823B2 (en) * | 2005-01-31 | 2011-06-28 | Arthrex, Inc. | Method and apparatus for performing an open wedge, high tibial osteotomy |
FR2885031B1 (en) * | 2005-05-02 | 2007-07-13 | Patrick Hechard | PROSTHETIC PIECE COMPRISING A PROSTHESIS FOR REPLACING AN ARTICULATION BETWEEN TWO BONDS OF A HUMAN BEING OR THE LIKE |
US7572293B2 (en) | 2005-06-30 | 2009-08-11 | Depuy Products, Inc. | Tibial insert and associated surgical method |
GB2432503B (en) * | 2005-11-23 | 2008-03-26 | Nicholson Machinery Ltd | Method and apparatus for topping vegetables |
US8540778B2 (en) | 2006-06-22 | 2013-09-24 | DePuy Synthes Products, LLC | Tibial insert having multiple keels |
US8163027B2 (en) | 2006-06-22 | 2012-04-24 | Depuy Products, Inc. | Tibial insert having a reinforced keel |
US8114165B2 (en) | 2006-06-22 | 2012-02-14 | Depuy Products, Inc. | Tibial insert and method for implanting the same |
US8764839B2 (en) | 2006-06-22 | 2014-07-01 | DePuy Synthes Products, LLC | Tibial insert having a keel including a bore formed therein |
US20080269908A1 (en) * | 2007-04-27 | 2008-10-30 | Piper Medical, Inc. | Carpometacarpal (cmc) joint arthoplasty implants and related jigs, medical kits and methods |
US8317869B2 (en) * | 2008-02-06 | 2012-11-27 | Exactech, Inc. | Femoral component of knee prosthesis, the femoral component having anterior/posterior claw(s) for digging into bone and/or a raised rib with a bulbous terminus |
US9480511B2 (en) | 2009-12-17 | 2016-11-01 | Engage Medical Holdings, Llc | Blade fixation for ankle fusion and arthroplasty |
US9925051B2 (en) * | 2010-12-16 | 2018-03-27 | Engage Medical Holdings, Llc | Arthroplasty systems and methods |
WO2013009966A2 (en) | 2011-07-13 | 2013-01-17 | The General Hospital Corporation D/B/A Massachusetts General Hospital | Methods and devices for knee joint replacement with anterior cruciate ligament substitution |
US9254130B2 (en) | 2011-11-01 | 2016-02-09 | Hyun Bae | Blade anchor systems for bone fusion |
US9615856B2 (en) | 2011-11-01 | 2017-04-11 | Imds Llc | Sacroiliac fusion cage |
US10238382B2 (en) | 2012-03-26 | 2019-03-26 | Engage Medical Holdings, Llc | Blade anchor for foot and ankle |
US9211190B2 (en) | 2012-12-05 | 2015-12-15 | Biomet Manufacturing, Llc | Flex anchor for attaching a prosthesis to bone |
US10271954B2 (en) * | 2016-01-22 | 2019-04-30 | Zimmer, Inc. | Methods and techniques for tibial implant placement |
US10390955B2 (en) | 2016-09-22 | 2019-08-27 | Engage Medical Holdings, Llc | Bone implants |
US20210290410A1 (en) * | 2017-03-03 | 2021-09-23 | Engage Uni Llc | Unicompartmental knee arthroplasty |
US10456272B2 (en) | 2017-03-03 | 2019-10-29 | Engage Uni Llc | Unicompartmental knee arthroplasty |
US11540928B2 (en) | 2017-03-03 | 2023-01-03 | Engage Uni Llc | Unicompartmental knee arthroplasty |
CN113367846B (en) * | 2021-05-22 | 2022-05-27 | 北京力达康科技有限公司 | Tibia prosthesis |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4016606A (en) | 1975-07-14 | 1977-04-12 | Research Corporation | Knee joint prosthesis |
US4470158A (en) | 1978-03-10 | 1984-09-11 | Biomedical Engineering Corp. | Joint endoprosthesis |
SU719625A1 (en) | 1978-04-26 | 1980-03-05 | Центральный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Травматологии И Ортопедии Им. Н.Н.Приорова | Artificial knee joint |
SE450336B (en) | 1984-11-28 | 1987-06-22 | Branemark Per Ingvar | LED PROTES FOR PERMANENT ANCHORING IN THE BONE TISSUE |
CH671690A5 (en) * | 1987-05-15 | 1989-09-29 | Sulzer Ag | |
CH672419A5 (en) | 1987-06-30 | 1989-11-30 | Sulzer Ag | |
SE468199B (en) | 1988-04-11 | 1992-11-23 | Astra Ab | KNAELEDSPROTES |
FR2630639B1 (en) | 1988-04-27 | 1994-04-29 | Lebeguec Pierre | PARTIAL KNEE PROSTHESIS DEVICE |
FR2630640B1 (en) * | 1988-04-27 | 1994-04-08 | Lebeguec Pierre | PARTIAL KNEE PROSTHESIS DEVICE |
DE4011216C1 (en) * | 1990-04-06 | 1991-05-23 | Eska Medical Luebeck Medizintechnik Gmbh & Co, 2400 Luebeck, De | Endo-prothesis esp. for knee joint surgery - has condyle bearing surface detachable from bone-attached baseplate to facilitate future replacement |
US5092895A (en) | 1990-05-30 | 1992-03-03 | Albrektsson Bjoern | Knee-joint prosthesis |
US6102954A (en) * | 1992-05-18 | 2000-08-15 | Astra Aktiebolag | Joint prosthesis and apparatus for preparing the bone prior to fitting of the prosthesis |
SE9201557D0 (en) * | 1992-05-18 | 1992-05-18 | Astra Ab | JOINT PROSTHESIS AND APPARATUS FOR PREPARING THE BONE PRIOR TO FITTING OF THE PROSTHESIS |
FR2691356B1 (en) * | 1992-05-20 | 1999-07-23 | Bouvet Jean Claude | KNEE PROSTHESIS. |
US5344458A (en) * | 1992-08-06 | 1994-09-06 | Bonutti Peter M | Arthroplasty component |
US5782924A (en) * | 1996-08-08 | 1998-07-21 | Johnson; Lanny L. | Fixation method and apparatus for total joint prosthesis |
-
1998
- 1998-12-22 SE SE9804492A patent/SE9804492D0/en unknown
-
1999
- 1999-12-21 AT AT99965682T patent/ATE288237T1/en not_active IP Right Cessation
- 1999-12-21 CN CNB998149233A patent/CN1178630C/en not_active Expired - Fee Related
- 1999-12-21 JP JP2000589112A patent/JP2002532191A/en active Pending
- 1999-12-21 KR KR1020017007942A patent/KR20020015682A/en not_active Application Discontinuation
- 1999-12-21 DE DE69923589T patent/DE69923589D1/en not_active Expired - Lifetime
- 1999-12-21 EP EP99965682A patent/EP1139927B1/en not_active Expired - Lifetime
- 1999-12-21 CA CA002356979A patent/CA2356979A1/en not_active Abandoned
- 1999-12-21 WO PCT/SE1999/002464 patent/WO2000036998A1/en not_active Application Discontinuation
- 1999-12-21 AU AU21369/00A patent/AU743145B2/en not_active Ceased
-
2001
- 2001-06-18 US US09/883,251 patent/US20020022890A1/en not_active Abandoned
-
2003
- 2003-10-14 US US10/684,922 patent/US7250061B2/en not_active Expired - Fee Related
Cited By (80)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9357989B2 (en) | 2000-05-01 | 2016-06-07 | Arthrosurface Incorporated | System and method for joint resurface repair |
US9204873B2 (en) | 2000-05-01 | 2015-12-08 | Arthrosurface Incorporated | System and method for joint resurface repair |
US6620199B2 (en) * | 2001-07-13 | 2003-09-16 | Ronald P. Grelsamer | Device for reinforcing bone in partial knee replacement surgery |
US20050283253A1 (en) * | 2002-02-20 | 2005-12-22 | Coon Thomas M | Knee arthroplasty prosthesis and method |
US8048163B2 (en) * | 2002-02-20 | 2011-11-01 | Zimmer, Inc. | Knee arthroplasty prosthesis |
US20030158606A1 (en) * | 2002-02-20 | 2003-08-21 | Coon Thomas M. | Knee arthroplasty prosthesis and method |
US9072605B2 (en) | 2002-02-20 | 2015-07-07 | Zimmer, Inc. | Knee arthroplasty prosthesis |
US20050283252A1 (en) * | 2002-02-20 | 2005-12-22 | Coon Thomas M | Knee arthroplasty prosthesis and method |
US20050283251A1 (en) * | 2002-02-20 | 2005-12-22 | Coon Thomas M | Knee arthroplasty prosthesis and method |
US20050283250A1 (en) * | 2002-02-20 | 2005-12-22 | Coon Thomas M | Knee arthroplasty prosthesis and method |
US8092546B2 (en) | 2002-02-20 | 2012-01-10 | Zimmer, Inc. | Knee arthroplasty prosthesis |
US8092545B2 (en) | 2002-02-20 | 2012-01-10 | Zimmer, Inc. | Knee arthroplasty prosthesis method |
US20100076567A1 (en) * | 2002-05-24 | 2010-03-25 | Zimmer, Inc. | Modular femoral components for knee arthroplasty |
US8460391B2 (en) | 2002-05-24 | 2013-06-11 | Zimmer, Inc. | Modular femoral components for knee arthroplasty |
US20030225457A1 (en) * | 2002-05-24 | 2003-12-04 | Justin Daniel F. | Femoral components for knee arthroplasty |
US7150761B2 (en) | 2002-05-24 | 2006-12-19 | Medicinelodge, Inc. | Modular femoral components for knee arthroplasty |
US7615081B2 (en) | 2002-05-24 | 2009-11-10 | Zimmer, Inc. | Femoral components for knee arthroplasty |
US7527650B2 (en) | 2002-11-22 | 2009-05-05 | Zimmer Technology, Inc. | Modular knee prosthesis |
US20080027563A1 (en) * | 2002-11-22 | 2008-01-31 | Zimmer Technology, Inc. | Modular knee prosthesis |
US20050107884A1 (en) * | 2002-11-22 | 2005-05-19 | Johnson Erin M. | Modular knee prosthesis |
US7105026B2 (en) | 2002-11-22 | 2006-09-12 | Zimmer Technology, Inc. | Modular knee prosthesis |
US20040102852A1 (en) * | 2002-11-22 | 2004-05-27 | Johnson Erin M. | Modular knee prosthesis |
US7297164B2 (en) | 2002-11-22 | 2007-11-20 | Zimmer Technology, Inc. | Modular knee prosthesis |
US20050278034A1 (en) * | 2002-11-22 | 2005-12-15 | Johnson Erin M | Modular knee prosthesis |
US10076343B2 (en) | 2002-12-03 | 2018-09-18 | Arthrosurface Incorporated | System for articular surface replacement |
US10624749B2 (en) | 2003-02-24 | 2020-04-21 | Arthrosurface Incorporated | Trochlear resurfacing system and method |
US9931211B2 (en) | 2003-02-24 | 2018-04-03 | Arthrosurface Incorporated | Trochlear resurfacing system and method |
US11337819B2 (en) | 2003-02-24 | 2022-05-24 | Arthrosurface Incorporated | Trochlear resurfacing system and method |
US9351745B2 (en) | 2003-02-24 | 2016-05-31 | Arthrosurface Incorporated | Trochlear resurfacing system and method |
US8852195B2 (en) | 2004-07-09 | 2014-10-07 | Zimmer, Inc. | Guide templates for surgical implants and related methods |
US20060111787A1 (en) * | 2004-11-05 | 2006-05-25 | Bailie David S | Glenoid prosthesis and method of implanting same |
US10624752B2 (en) * | 2006-07-17 | 2020-04-21 | Arthrosurface Incorporated | Tibial resurfacing system and method |
US20140155902A1 (en) * | 2006-07-17 | 2014-06-05 | Arthrosurface, Inc. | Tibial Resurfacing System and Method |
US11471289B2 (en) | 2006-07-17 | 2022-10-18 | Arthrosurface Incorporated | Tibial resurfacing system and method |
US10959740B2 (en) | 2006-12-11 | 2021-03-30 | Arthrosurface Incorporated | Retrograde resection apparatus and method |
US10045788B2 (en) | 2006-12-11 | 2018-08-14 | Arthrosurface Incorporated | Retrograde resection apparatus and method |
US9358029B2 (en) | 2006-12-11 | 2016-06-07 | Arthrosurface Incorporated | Retrograde resection apparatus and method |
US8480751B2 (en) | 2007-01-10 | 2013-07-09 | Biomet Manufacturing, Llc | Knee joint prosthesis system and method for implantation |
US8328873B2 (en) | 2007-01-10 | 2012-12-11 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US8157869B2 (en) | 2007-01-10 | 2012-04-17 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US8163028B2 (en) | 2007-01-10 | 2012-04-24 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US8936648B2 (en) | 2007-01-10 | 2015-01-20 | Biomet Manufacturing, Llc | Knee joint prosthesis system and method for implantation |
US20110144757A1 (en) * | 2007-09-17 | 2011-06-16 | Linares Medical Devices, Llc | Artificial joint support between first and second bones |
US10736747B2 (en) | 2007-10-10 | 2020-08-11 | Biomet Manufacturing, Llc | Knee joint prosthesis system and method for implantation |
US8187280B2 (en) | 2007-10-10 | 2012-05-29 | Biomet Manufacturing Corp. | Knee joint prosthesis system and method for implantation |
US9763793B2 (en) | 2007-10-10 | 2017-09-19 | Biomet Manufacturing, Llc | Knee joint prosthesis system and method for implantation |
US8562616B2 (en) | 2007-10-10 | 2013-10-22 | Biomet Manufacturing, Llc | Knee joint prosthesis system and method for implantation |
US9585759B2 (en) | 2008-06-27 | 2017-03-07 | Zimmer, Inc. | ACL accommodating tibial design |
US10271955B2 (en) | 2008-06-27 | 2019-04-30 | Zimmer, Inc. | ACL accommodating tibial design |
US9662126B2 (en) | 2009-04-17 | 2017-05-30 | Arthrosurface Incorporated | Glenoid resurfacing system and method |
US10945743B2 (en) | 2009-04-17 | 2021-03-16 | Arthrosurface Incorporated | Glenoid repair system and methods of use thereof |
US9283076B2 (en) | 2009-04-17 | 2016-03-15 | Arthrosurface Incorporated | Glenoid resurfacing system and method |
US11478259B2 (en) | 2009-04-17 | 2022-10-25 | Arthrosurface, Incorporated | Glenoid resurfacing system and method |
US10478200B2 (en) | 2009-04-17 | 2019-11-19 | Arthrosurface Incorporated | Glenoid resurfacing system and method |
US9066716B2 (en) | 2011-03-30 | 2015-06-30 | Arthrosurface Incorporated | Suture coil and suture sheath for tissue repair |
US9861372B2 (en) | 2011-05-27 | 2018-01-09 | Howmedica Osteonics Corp. | Prosthetic implant and associated instruments |
US11712276B2 (en) | 2011-12-22 | 2023-08-01 | Arthrosurface Incorporated | System and method for bone fixation |
US9468448B2 (en) | 2012-07-03 | 2016-10-18 | Arthrosurface Incorporated | System and method for joint resurfacing and repair |
US10307172B2 (en) | 2012-07-03 | 2019-06-04 | Arthrosurface Incorporated | System and method for joint resurfacing and repair |
US11191552B2 (en) | 2012-07-03 | 2021-12-07 | Arthrosurface, Incorporated | System and method for joint resurfacing and repair |
US9492200B2 (en) | 2013-04-16 | 2016-11-15 | Arthrosurface Incorporated | Suture system and method |
US10695096B2 (en) | 2013-04-16 | 2020-06-30 | Arthrosurface Incorporated | Suture system and method |
US11648036B2 (en) | 2013-04-16 | 2023-05-16 | Arthrosurface Incorporated | Suture system and method |
US10575957B2 (en) | 2014-03-07 | 2020-03-03 | Arthrosurface Incoporated | Anchor for an implant assembly |
US10624748B2 (en) | 2014-03-07 | 2020-04-21 | Arthrosurface Incorporated | System and method for repairing articular surfaces |
US9962265B2 (en) | 2014-03-07 | 2018-05-08 | Arthrosurface Incorporated | System and method for repairing articular surfaces |
US9931219B2 (en) | 2014-03-07 | 2018-04-03 | Arthrosurface Incorporated | Implant and anchor assembly |
US11083587B2 (en) | 2014-03-07 | 2021-08-10 | Arthrosurface Incorporated | Implant and anchor assembly |
US11766334B2 (en) | 2014-03-07 | 2023-09-26 | Arthrosurface Incorporated | System and method for repairing articular surfaces |
US11607319B2 (en) | 2014-03-07 | 2023-03-21 | Arthrosurface Incorporated | System and method for repairing articular surfaces |
US10624754B2 (en) | 2014-03-07 | 2020-04-21 | Arthrosurface Incorporated | System and method for repairing articular surfaces |
US9861492B2 (en) | 2014-03-07 | 2018-01-09 | Arthrosurface Incorporated | Anchor for an implant assembly |
US9757243B2 (en) * | 2014-07-08 | 2017-09-12 | Zimmer, Inc. | Intercondylar component and fin attachment features for use in knee arthroplasty |
US20160008136A1 (en) * | 2014-07-08 | 2016-01-14 | Zimmer, Inc. | Intercondylar component and fin attachment features for use in knee arthroplasty |
US20180153598A1 (en) * | 2016-12-06 | 2018-06-07 | Smed-Ta/Td, Llc | Orthopaedic implant with fixation feature and a method of implanting thereof |
US10631904B2 (en) * | 2016-12-06 | 2020-04-28 | Smed-Ta/Td, Llc | Orthopaedic implant with fixation feature and a method of implanting thereof |
US11160663B2 (en) | 2017-08-04 | 2021-11-02 | Arthrosurface Incorporated | Multicomponent articular surface implant |
EP3895665A4 (en) * | 2018-12-12 | 2022-11-23 | Vetrust Meditech Co., Ltd. | Animal knee joint implant reflecting anatomical structure of animal |
CN113271894A (en) * | 2018-12-12 | 2021-08-17 | 兽铁保有限公司 | Animal knee joint implant reflecting animal anatomy structure |
US11478358B2 (en) | 2019-03-12 | 2022-10-25 | Arthrosurface Incorporated | Humeral and glenoid articular surface implant systems and methods |
Also Published As
Publication number | Publication date |
---|---|
CN1178630C (en) | 2004-12-08 |
SE9804492D0 (en) | 1998-12-22 |
EP1139927A1 (en) | 2001-10-10 |
KR20020015682A (en) | 2002-02-28 |
EP1139927B1 (en) | 2005-02-02 |
ATE288237T1 (en) | 2005-02-15 |
CA2356979A1 (en) | 2000-06-29 |
WO2000036998A1 (en) | 2000-06-29 |
DE69923589D1 (en) | 2005-03-10 |
US7250061B2 (en) | 2007-07-31 |
CN1331574A (en) | 2002-01-16 |
AU2136900A (en) | 2000-07-12 |
AU743145B2 (en) | 2002-01-17 |
JP2002532191A (en) | 2002-10-02 |
US20040083005A1 (en) | 2004-04-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7250061B2 (en) | Method of anchoring a prosthesis structure | |
US5571194A (en) | Femoral augmentation system for artificial knee joint | |
EP0850606B1 (en) | Modular joint prosthesis stabilization and augmentation system | |
JP4040758B2 (en) | Modular instruments for bone adjustment and trial reduction of orthopedic implants | |
EP1023881B1 (en) | Modular tibial insert for prosthesis system | |
US6709461B2 (en) | Modular joint prosthesis system | |
US5019103A (en) | Tibial wedge system | |
CA2484522C (en) | Femoral components for knee arthroplasty | |
US6139581A (en) | Posterior compensation tibial tray | |
JP5448842B2 (en) | Knee joint prosthesis system and implantation method | |
AU605016B2 (en) | Prosthetic knee joint with improved patellar component tracking | |
US8460391B2 (en) | Modular femoral components for knee arthroplasty | |
US4834758A (en) | Bone prosthesis for the leg and thigh | |
EP0904748B1 (en) | Joint prosthesis system with a rotatable component having a keyed axial securement | |
US20030014120A1 (en) | Orthopedic implant extension | |
JPH08508190A (en) | Implantable prosthetic patella element | |
KR101891902B1 (en) | Reverse knee prosthesis |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ASTRA TECH AB, SWEDEN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JACOBSSON, MAGNUS;CARLSSON, LARS;ALBREKTSSON, BJORN;AND OTHERS;REEL/FRAME:012259/0610;SIGNING DATES FROM 20010912 TO 20010920 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |