EP0758873A1 - Orthopedic prosthesis - Google Patents
Orthopedic prosthesisInfo
- Publication number
- EP0758873A1 EP0758873A1 EP95919055A EP95919055A EP0758873A1 EP 0758873 A1 EP0758873 A1 EP 0758873A1 EP 95919055 A EP95919055 A EP 95919055A EP 95919055 A EP95919055 A EP 95919055A EP 0758873 A1 EP0758873 A1 EP 0758873A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- prosthesis
- orthopedic
- liner
- polished
- orthopedic joint
- 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.)
- Withdrawn
Links
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
- A61F2/3094—Designing or manufacturing processes
- A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
-
- 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
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
-
- 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
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- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
- A61B17/1742—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the hip
- A61B17/1746—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the hip for the acetabulum
-
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- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
- A61B17/1764—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the knee
-
- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
- A61B17/1778—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the shoulder
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
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- A—HUMAN NECESSITIES
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- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00004—(bio)absorbable, (bio)resorbable, resorptive
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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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
-
- 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
-
- 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
- A61F2/32—Joints for the hip
-
- 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
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/468—Testing instruments for artificial joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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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
- 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
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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
- 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
- A61F2002/30136—Rounded shapes, e.g. with rounded corners undulated or wavy, e.g. serpentine-shaped or zigzag-shaped
-
- A—HUMAN NECESSITIES
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- 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
- A61F2002/30329—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
- A61F2002/30362—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 with possibility of relative movement between the protrusion and the recess
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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
- 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
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
- A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
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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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- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
- A61F2002/30538—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation
- A61F2002/3054—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
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- 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
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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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- A61F2002/30891—Plurality of protrusions
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- A61F2/02—Prostheses implantable into the body
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- 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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
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- 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
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- 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
- A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
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- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
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- 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
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- 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
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00395—Coating or prosthesis-covering structure made of metals or of alloys
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
- A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
Definitions
- the present invention relates to orthopedic prosthetic joint devices for implantation into or replacement of a joint of the human or animal body.
- a number of commercially available prosthetic devices for implantation into a patient's joint or for total joint replacement include a metallic part and a plastics liner forming at least in part, the articulating surface of the joint.
- a cotyliodal component for a non-cemented hip prosthesis there is provided a cotyliodal component for a non-cemented hip prosthesis. The component has two parts, a titanium hemispherical shell and a cup of polymer which is engaged into it.
- acetabular cups include European Patent Application No. 212,087 published April 3, 1987, wherein metallic pins project from the surface of the cup and contain holes in which tissue may grow.
- European Patent No. 341,198 published November 8, 1989 an acetabular cup has a metal outer shell and a plastic body for retaining the hip joint head.
- a combination of a plastics liner and a base member is also a feature of other joint prostheses such as those for implantation into the shoulder or knee.
- a tibial prosthei ⁇ which has a plate or Insert forming an 2 articulating surface for the joint is described in
- the present invention provides an improved orthopedic joint prosthesis wherein the prosthesis body has a base member (e.g. tray, cup or shell)and a polymeric liner.
- the polymeric liner affixes to the prosthesis body and provides an articulating surface for engaging another prosthesis member.
- the prosthesis body has a non- rticulating mirrored or polished surface that receives the plastic liner.
- This surface has a polished surface that faces the liner for retarding liner debris generation.
- the polished surface has a roughness of preferably less than eight (8) micro- inches.
- the combination of the polymeric liner and orthopedic base with mirrored or polished surface finish provides numerous advantages. First, it provides a low friction and low abrasion surface for distributing the contact forces between the polyethylene liner (e.g., UHMWPE) and the prosthesis body shell. This reduces the abrasive generation of polyethylene debris resulting from motion between the liner and the body.
- polyethylene liner e.g., UHMWPE
- This motion may come om a variety of mechanisms which include Poisson volumetric distortion of the polyethylene resulting in 3 localized expansion and contraction of the surface of the liner against the body as a result of loading the liner, and the micro-motion which occurs from forces from a liner within and around the confines of the prosthesis body interior.
- the femoral head is loaded at the liner.
- Micro-motion can occur in hip prosthesis from forces generated by the femoral head pushing the liner within and around the confines of the prosthesis body, namely an acetabular cup body with a concave polished surface that receives the liner.
- Micro-motion can occur in a knee prosthesis as a tibial tray liner receive ⁇ force generated by a femoral pr ⁇ thesis.
- a shoulder or glenoid component also has force transmitted at the joint to a plastic liner of the glenoid metallic component.
- the mirror finish also allows the use of optical non-contact inspection of the interior of the metallic component surface for checking the geometric correctness of the component.
- the use of non-contact optical inspection methods allow complete checking of whole two and three dimensional surfaces at one time.
- the usual method of optical three-dimensional inspection is to project a regular pattern of light onto the surface which is to be inspected.
- the resultant two dimensional projection of the scene may be used to give highly accurate total surface measurement. Distortions in the regular pattern indicate distortions in the part surface and indicate deviations from the desired part geometry.
- This method is ineffective on highly smooth surfaces since the projected light of the regular pattern bounces off the measurement target and no two dimensional mapping is possible, ⁇ n this device the highly smooth surface is further polished to act as a reflective mirror.
- This surface mirror then is used as a lens to view a two-dimensional pattern such as a grid drawn on a white sheet of paper or a series of concentric rings. Distortions in the viewed image then are a result of distortions of the lens and hence the surface which is desired to be measured. It is thereby possible to inspect the highly smooth surface of the prosthesis body due to this polishing.
- the method of inspection may be both by trained human inspectors and by image analysis performed by capturing the reflected image by a video camera, digitizing the image, and using computer analysis to measure the amount of deviation of the pattern from the allowed surface geometry tolerance.
- This smooth and polished surface is therefore to provide non-contact, and therefore non-d ⁇ Btructive (non-scratching) , measurement of the interior of an acetabular device.
- the inspection methods require a surface 5 which allows a reflective resolution sufficient to provide adequate reflective image quality for analysis.
- Current inspection limits require a surface finish of less than eight (8) micro-inches to accomplish this quality of resolution.
- an acetabular cup body preferably includes openings therethrough which can function as drill guides for the surgeon after the cup has been placed in the patient's acetabulum.
- a second embodiment of the invention is a glenoid prosthesis for implantation into a shoulder.
- a further embodiment of the invention may be a knee prosthesis such as those generally used for total knee replacement implants.
- FIGURE 1 is a side sectional view of the preferred embodiment of the apparatus of the present invention showing an acetabular cup
- FIGURE 2 is a side sectional view of the preferred embodiment of the apparatus of the present invention showing an acetabular cup
- FIGURE 3 is an exploded perspective view of the preferred embodiment of the apparatus of the present invention showing an acetabular cup
- FIGURE 4 is a top view of the preferred embodiment of the apparatus of the present invention showing a glenoid componen ;
- FIGURE 5 is a bottom view of the preferred embodiment of the apparatus of the present invention showing a glenoid component
- FIGURE 6 is an elevational view of the preferred embodiment of the apparatus of the present invention showing a glenoid component
- FIGURE 7 is a side view of the preferred embodiment of the apparatus of the present invention showing a glenoid component
- FIGURE 8 is a bottom view of th ⁇ preferred embodiment of the apparatus of the present invention showing a tibial component; /US95/05710
- FIGURE 9 is an elevational view of the preferred embodiment of the apparatus of the present invention taken along lines 9-9 if figure 8, showing a tibial component;
- FIGURE 10 is a sectional view taken along lines 10 - 10 of Figure 8.
- FIGURE 11 is an elevational view of the preferred embodiment of the apparatus of the present invention showing a tibial component
- FIGURE 12 is a side view of the preferred embodiment of the apparatus of the present invention showing an asym ⁇ etrio tibial component
- FIGURE 13 is a top view of the preferred embodiment of the apparatus of the present invention showing an asymmetric tibial glenoid component
- FIGURE 14 is an elevational view of the preferred embodiment of the apparatus of the present invention showing an asymmetric tibial component
- FIGURE 15 is a bottom view of the preferred embodiment of the apparatus of the present invention showing an asymmetric tibial component.
- FIGURE 16 is a schematic diagram of the grid used to inspect the polished surface for distortions
- FIGURE 17 is a second embodiment of a ' test grid pattern used to inspect the highly polished surface portion of the acetabular cup prosthesis of the present invention.
- FIGURE l ⁇ is a schematic diagram of a test grid showing no surface defects.
- FIGURE 19 is schematic diagram showing local defects for a polished surface that has been inspected using the grid. 5/05710
- FIGURE 1 there can be seen a sectional view of the f irst embodiment of the apparatus of the present invention designated generally by the numeral 10.
- FIGURE l there can be seen a hip prosthesis member 11 mounted in a femur 12 of a patient.
- the hip prosthesis 11 includes an upper ball portion 13 that registers with the acetabular prosthetic apparatus 10 of the present invention.
- the acetabular prosthesis 10 includes a cup or shell prosthesis body 14, preferably of a metallic material with a plastic liner 15 portion.
- the metallic cup body 14 includes an inner concave surface 16 and an outer convex surface 17.
- the surfaces 16, 17 are spaced apart, defining the thickness of the cup or shell 14.
- the cup body 14 can provide a three- dimensional surface treatment that is sintered to the outside surface 17 (such as sintered metal beads) .
- the surface 17 can be machined after sintering.
- Another type of roughened outer surface 17 could be provided such as plasma sprayed metal, plasma sprayed hydroxy1 apatite, or a mechanically textured or roughened surface.
- the shell or cup body 14 could have an exterior surface 17 optimized for use with bone cement.
- a plurality of openings 18 in form of preferably elongated bores extend between the inner concave surface 16 and the outer convex surface 17. These openings are in the form of bores having a bore wall 19.
- the openings 18 can function as drill guides for the surgeon. Therefore, once the metallic cup body 14 portion of the acetabular cup prosthesis
- each opening 18 can act as a drill guide for the surgeon.
- the bore 19 walls of each opening 18 can be shaped to define a guide for a correspondingly shaped and sized drill, openings 18 allow the surgeon to form surgical openings in the underlying bone tissue 20.
- a selected surgically formed opening 18 is then occupied by a peg (and not necessarily each opening 18) , such as one of the pegs 25 - 28, as seen in Figure l.
- each of the pegs 25 - 28 extends into the bone tissue at a different angular position with respect to the other pegs to provide a rigid anchor for the cup 1 .
- Pegs 25- 28 can be polymer, metal, or resorbable polymer, in Figure 2, cup body 14 is secured with a plurality of bone screws 30-33.
- Each bone screw has a frustroconical section 34 that forms a wedge-lock or taper lock connection with a frustroconical opening or bore 35 in cup body 14 when the threaded shank 36 of each bone screw 30-33 fully engages underlying bone tissue 20.
- Cup body 12 is preferably metallic having an annular base 38 that defines a plane (see Figure 3) .
- the cup body 12 concave surface 16 is a shiny polished surface that faces the convex surface 39 of polymeric liner 15.
- the polished concave surface 16 has a roughness of less than sixteen (16) micro- inches, and preferably less than eight (8) micro-inches. Such a highly polished surface 16 appears mirror-like.
- the polished concave surface 16 inhibits polymer liner debris generation.
- Liner 15 has an inner concave surface 40 that receives femur ball portion 13 during use (see Figures 1 and 2).
- FIG. 4-7 the preferred embodiment of the apparatus of the present invention 10 is shown in the form of a glenoid US95/05710
- the glenoid prosthesis 10 includes a component 41 that can cooperate with a humeral component (not shown) .
- the use of glenoid components is part of a total shoulder system can be seen for example in Smith & Nephew Richards publication entitled "Cofield Total Shoulder System Surgical Technique", and in U.S. Patent 5,108,396, incorporated herein by reference.
- the glenoid component 41 has a bone ingrowth surface 42 that can be, for example, a plurality of metallic sintered beads 43. Bone ingrowth surface 42 is attached to the patient's bone tissue with bone cement and screws for example as described more fully in the Cofield Total Shoulder
- Surface 44 is a mirror surface that receives a polyethylene or like insert that provides an articulating surface for articulating with a humeral component.
- the mirror surface 44 is a non-articulating surface that engages the rear or non-articulating surface of the polyethylene insert.
- the glenoid component can include a stem 45 and cylindrical hollow sleeves 46 that accommodate bone screws. Annular shoulder 47 projects away from mirror surface 44, defining a structure that can hold the polyethylene insert during use.
- the preferred embodiment 10 of the apparatus of the present invention is shown in the form of a tibial prosthesis.
- the tibial prosthesis 10 includes a tibial component 48 having a stem 49 that occupies a surgically formed opening in the patient's tibia.
- the distal side of tray 51 registers against the patient's proximal tibia, once surgically shaped to receive tibial component 48.
- Tibial component 48 has a mirror surface 50 that receives polymeric insert 52 (see Figure 11) .
- Mirror surface 50 is provided on the proximal side of tray 51.
- polymeric insert 52 articulates with femoral component 53.
- Femoral component 53 is attached to the patient's femur 54 (as shown in Figure ll) , articulating against polymeric insert 52 that is supported upon the mirror surface 50.
- Surface 50 is the proximal surface of tray 51.
- the mirror surface is a non-articulating surface that engages the rear or distal surface of the polymeric insert 52.
- the proximal surf ce of polymeric insert 52 is an articulating sur ace that receives a polished metallic articulating surface of femoral component 53.
- Prosthesis 10 includes an asymmetrio tibial component 56 that has a bone engaging surface 57 that engages, -the proximal, surgically prepared surface of the patient's tibia.
- the opposing surface from bone engaging surface 57 is a proximal, mirror surface 58 that receives a polymeric insert (not shown) .
- 59 and mirror surface 58 define non-articulating surfaces that receive the polymeric insert, much in the same fashion that polymeric insert 52 is held with tray 51 at surface 50.
- An opening 60 allows tibial component 56 to be attached to the patient's tibia using a bone screw, for example.
- the present invention provides an improvement that features a mirror surface portion in combination with a - 12 - polymeric insert as aforede ⁇ ribed as part of an overall prosthesis 10.
- FIGs 16-19 grid charts 200, 205 that can be drawn on a white sheet of paper for example and used to inspect the highly polished inner concave surface 16'' of acetabular cup body 14 for defects.
- a grid 200 is in the form of a plurality of concentric rings 201, 202, 203, etc.
- a central opening 204 allows the user to visually inspect the inside surface 16 of the cup body 14 when the flat grid 200 is placed on top of the cup body 14 with the print of chart 200 facing the mirror like polished concave surface 16. in this fashion, the user simply views the lined pattern of the concentric rings 201-203 of grid chart 200 as reflected off the mirror surface of the inside, concave surface 16 of the cup body 14.
- a reflective pattern for the test grid 205 is shown as pattern 206, showing no defects.
- FIG 19 another test grid pattern reflection 207 is shown that notes two local defects 208, 209.
- Figure 16 illustrates a method of inspection that may be used by trained human inspectors, simply looking through the central opening 204. When such human inspection is employed, the inspector simply looks through the opening 204 when the grid chart 200, 205 is placed against the concave 16 side of acetabular cup body 14.
- Another method of inspection may be by image analysis performed by capturing the reflected image with a video camera, digitizing the image and using computer analysis to measure the amount of deviation of the pattern from the allowed surface geometry tolerance.
- the surface 16 defines a mirror that is used as a lens to view a two • - 13 - dimensional pattern such as the grid patterns 200, 205 drawn for example on a white sheet of paper. Distortions in the viewed image are then a result of distortions of the lens surface 16 and hence the surface which is desired to be measured.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US23997294A | 1994-05-09 | 1994-05-09 | |
US239972 | 1994-05-09 | ||
PCT/US1995/005710 WO1995030389A1 (en) | 1994-05-09 | 1995-05-05 | Orthopedic prosthesis |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0758873A1 true EP0758873A1 (en) | 1997-02-26 |
EP0758873A4 EP0758873A4 (en) | 1998-01-28 |
Family
ID=22904546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95919055A Withdrawn EP0758873A4 (en) | 1994-05-09 | 1995-05-05 | Orthopedic prosthesis |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0758873A4 (en) |
JP (1) | JPH09511668A (en) |
AU (1) | AU696248B2 (en) |
CA (1) | CA2190029A1 (en) |
WO (1) | WO1995030389A1 (en) |
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US5925077A (en) * | 1997-04-02 | 1999-07-20 | Biomet, Inc. | Apparatus and method for plugging holes in an acetabular shell component |
US6413259B1 (en) | 2000-12-14 | 2002-07-02 | Blackstone Medical, Inc | Bone plate assembly including a screw retaining member |
EP1479359A1 (en) * | 2003-04-09 | 2004-11-24 | SQ Developments AG | Shoulder prothesis. |
GB0320287D0 (en) * | 2003-08-29 | 2003-10-01 | Stanmore Implants Worldwide | Shoulder joint prosthetic system |
US8182518B2 (en) | 2003-12-22 | 2012-05-22 | Life Spine, Inc. | Static and dynamic cervical plates and cervical plate constructs |
JP4919248B2 (en) | 2005-05-31 | 2012-04-18 | 博泰 池上 | Artificial elbow joint |
GB2431354A (en) * | 2005-10-24 | 2007-04-25 | Benoist Girard Sas | A prosthetic glenoid component with soft bearing surface |
DE102006002210B4 (en) * | 2006-01-16 | 2007-09-27 | Dot Gmbh | Modular revision socket for hip arthroplasty and anchoring pegs |
EP1991171A4 (en) | 2006-02-21 | 2012-03-21 | Life Spine Inc | Structure for joining and retaining multi-part orthopedic implants |
EP2057970B1 (en) | 2007-11-07 | 2016-01-06 | Arthrex, Inc. | Hybrid glenoid for shoulder arthroplasty |
WO2010025405A1 (en) | 2008-08-29 | 2010-03-04 | Life Spine, Inc. | Single-sided dynamic spine plates |
GB201007166D0 (en) * | 2010-04-29 | 2010-06-09 | Finsbury Dev Ltd | Prosthesis |
EP2595574B1 (en) * | 2010-07-24 | 2017-05-03 | Zimmer, Inc. | Asymmetric tibial components for a knee prosthesis |
US8764840B2 (en) | 2010-07-24 | 2014-07-01 | Zimmer, Inc. | Tibial prosthesis |
US8900319B2 (en) | 2010-07-29 | 2014-12-02 | Mayo Foundation For Medical Education And Research | Acetabular cup prosthesis |
US8591594B2 (en) | 2010-09-10 | 2013-11-26 | Zimmer, Inc. | Motion facilitating tibial components for a knee prosthesis |
US8603101B2 (en) | 2010-12-17 | 2013-12-10 | Zimmer, Inc. | Provisional tibial prosthesis system |
US9017412B2 (en) | 2011-04-29 | 2015-04-28 | Life Spine, Inc. | Spinal interbody implant with bone screw retention |
EP2713921B1 (en) | 2011-06-03 | 2017-10-11 | Smith & Nephew, Inc | Prosthesis guide comprising patient-matched features |
EP3848005A3 (en) | 2011-11-18 | 2021-09-15 | Zimmer, Inc. | Tibial bearing component for a knee prosthesis with improved articular characteristics |
AU2012341026B2 (en) | 2011-11-21 | 2015-01-29 | Zimmer, Inc. | Tibial baseplate with asymmetric placement of fixation structures |
IN2014DN07145A (en) | 2012-01-30 | 2015-04-24 | Zimmer Inc | |
FR3008605B1 (en) * | 2013-07-18 | 2015-08-21 | Medacta Int Sa | TIBIAL COMPONENT FOR KNEE JOINT RECONSTRUCTION PROSTHESIS |
US9925052B2 (en) | 2013-08-30 | 2018-03-27 | Zimmer, Inc. | Method for optimizing implant designs |
US9889014B2 (en) | 2014-02-06 | 2018-02-13 | Life Spine, Inc. | Implant for bone fixation |
US9877759B2 (en) | 2014-02-06 | 2018-01-30 | Life Spine, Inc. | Foot implant for bone fixation |
EP3352708B1 (en) | 2015-09-21 | 2020-07-22 | Zimmer, Inc. | Prosthesis system including tibial bearing component |
ES2878003T3 (en) | 2017-03-10 | 2021-11-18 | Zimmer Inc | Tibial prosthesis with locking feature for a tibial bearing component |
AU2018266322B2 (en) | 2017-05-12 | 2020-03-19 | Zimmer, Inc. | Femoral prostheses with upsizing and downsizing capabilities |
US11426282B2 (en) | 2017-11-16 | 2022-08-30 | Zimmer, Inc. | Implants for adding joint inclination to a knee arthroplasty |
US10835380B2 (en) | 2018-04-30 | 2020-11-17 | Zimmer, Inc. | Posterior stabilized prosthesis system |
CN111588518B (en) * | 2020-05-14 | 2021-07-27 | 天衍医疗器材有限公司 | Hip joint prosthesis |
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EP0313773A1 (en) * | 1987-10-28 | 1989-05-03 | GebràDer Sulzer Aktiengesellschaft | Artificial acetabular cup |
EP0499475A2 (en) * | 1991-02-14 | 1992-08-19 | SMITH & NEPHEW RICHARDS, INC. | Acetabular prosthesis with anchoring pegs |
WO1994005234A1 (en) * | 1992-08-31 | 1994-03-17 | Smith & Nephew Richards Inc. | Acetabular cup body prosthesis |
EP0739613A1 (en) * | 1995-04-27 | 1996-10-30 | BENOIST GIRARD & Cie | Acetabulum cup for a total prosthesis of the hip |
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US4770661A (en) * | 1982-01-18 | 1988-09-13 | Indong Oh | Conversion femoral endoprosthesis |
-
1995
- 1995-05-05 EP EP95919055A patent/EP0758873A4/en not_active Withdrawn
- 1995-05-05 WO PCT/US1995/005710 patent/WO1995030389A1/en not_active Application Discontinuation
- 1995-05-05 JP JP7529153A patent/JPH09511668A/en active Pending
- 1995-05-05 CA CA002190029A patent/CA2190029A1/en not_active Abandoned
- 1995-05-05 AU AU24757/95A patent/AU696248B2/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0313773A1 (en) * | 1987-10-28 | 1989-05-03 | GebràDer Sulzer Aktiengesellschaft | Artificial acetabular cup |
EP0499475A2 (en) * | 1991-02-14 | 1992-08-19 | SMITH & NEPHEW RICHARDS, INC. | Acetabular prosthesis with anchoring pegs |
WO1994005234A1 (en) * | 1992-08-31 | 1994-03-17 | Smith & Nephew Richards Inc. | Acetabular cup body prosthesis |
EP0739613A1 (en) * | 1995-04-27 | 1996-10-30 | BENOIST GIRARD & Cie | Acetabulum cup for a total prosthesis of the hip |
Non-Patent Citations (1)
Title |
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See also references of WO9530389A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2190029A1 (en) | 1995-11-16 |
AU2475795A (en) | 1995-11-29 |
AU696248B2 (en) | 1998-09-03 |
JPH09511668A (en) | 1997-11-25 |
EP0758873A4 (en) | 1998-01-28 |
WO1995030389A1 (en) | 1995-11-16 |
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