WO1991007931A1 - Artificial joint, especially for ankle joints - Google Patents
Artificial joint, especially for ankle joints Download PDFInfo
- Publication number
- WO1991007931A1 WO1991007931A1 PCT/SE1990/000791 SE9000791W WO9107931A1 WO 1991007931 A1 WO1991007931 A1 WO 1991007931A1 SE 9000791 W SE9000791 W SE 9000791W WO 9107931 A1 WO9107931 A1 WO 9107931A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- socket
- ball
- joint prosthesis
- prosthesis according
- anchoring means
- Prior art date
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
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4202—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for ankles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—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
- 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
- A61F2002/30383—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
- A61F2002/30387—Dovetail connection
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- 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
- A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
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- 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
- A61F2002/30316—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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- 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
- A61F2002/30535—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
- A61F2002/30553—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting a position by translation along an axis
- A61F2002/30555—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting a position by translation along an axis along two perpendicular axes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30576—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs
- A61F2002/30578—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs having apertures, e.g. for receiving fixation screws
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
- A61F2002/30649—Ball-and-socket joints
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—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
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30784—Plurality of holes
- A61F2002/30785—Plurality of holes 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
- 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
- A61F2002/30884—Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—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
- A61F2002/30904—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed
-
- 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
- A61F2002/30922—Hardened surfaces
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- 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
- 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
- A61F2220/0041—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0004—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable
- A61F2250/0008—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable for adjusting a position by translation along an axis or two perpendicular axes
-
- 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
Definitions
- the present invention relates to a joint prosthesis.
- - 1 comprising a ball and a socket, surgically implantable anchoring means for the ball and the socket, and connect ⁇ ing elements by means of which the ball and the socket can 5 be fixed to their respective anchoring means.
- ankle prostheses for example, of 10 titanium have been developed.
- anchoring means in the form of titanium plates are used, which, in a first operation, are inserted and screwed securely to the tibia and talus.
- a second operation is performed in which the ends of the bones are cut off, whereafter the ball and the socket are screwed securely to the anchoring means which are inte ⁇ grated with the bones. Since it is impossible to determine 20 .
- the surgeon must, at the second operation, either have access to an assortment of different joint components to be certain to find a ball and a socket which will be correctly aligned 25 with each other in view of the positions of the anchoring means, or he must be able during the operation to work on the components of the joint prosthesis in order to achieve a proper fit. This is time consuming and often involves having to accept minor deviations from an ideal alignment.
- the purpose of the present invention is to provide a joint prosthesis of the type described by way of introduction, which eliminates the need for working up the components or having a variety of different prosthesis components during 35 the second operation. At the same time, it is intended to provide a guite exact fit between the socket and the ball.
- the connecting elements comprise means permitting relative lateral displacement of the ball and of the socket relative to the associated connected element, means for locking the ball and the socket into the respective connecting element after adjustment of the ball and the socket in relation to each other, and means arranged to permit vertical adjustment of the distance between at least one of the anchoring means and associated connecting element.
- Figure l shows a partially sectioned side view of an ankle prosthesis according to the invention
- Figure 2 shows a front view of the ankle prosthesis in Figure 1.
- the ankle prosthesis according to the invention comprises upper and lower anchoring means in the form of a plate l and a pair of externally and internally threaded sleeves
- the plate 1 is provided at. its lower end with a bead 3 of circular cross-section, which is disposed in a circular groove 4 in a connecting element in the form of a bridge 5, having a dovetail groove 6 extending perpendicular to the circular groove 4.
- a slide body 8 In the dovetail groove 6, there is received a slide body 8 having the same profile as the groove 6 and integral with a plate 7.
- the plate 7 has a depression 9, in which the ankle joint socket 10 is fixed, e.g. by adhesive.
- the arrangement described makes the 5 socket 10 displaceable laterally relative to the anchoring plate l.
- the connection via the bead 3 and the groove 4 makes possible a minor angular adjustment of the bridge 5 relative to the plate 1.
- a connecting element in the form of a second bridge 12 with a dovetail groove 13 is joined to the sleeves 2 by means of four links or legs 14.
- the links 14 are screwed securely to the bridge 12 and the sleeves 2 with the aid of upper screws 15 which are screwed into the threaded
- stop screws e.g. socket-head screws 21, 22, which are screwed into threaded through-bores 23 and 24, respectively, to the respective dovetail groove 6 and 13, respectively.
- the ankle prosthesis described is implanted in two opera ⁇ tions.
- the plate l is implanted into the tibia and the sleeves 2 are implanted in the talus.
- the plate 1 is provided with evenly spaced holes 20
- the sleeves 2 are preferably also provided with holes or perforations (not shown).
- the tibia is now shortened so that the cylindrical end surface 3 is exposed and it is slid into the cylindrical groove 4 in the bridge 5.
- This connection permits com ⁇ pensation for minor angular errors when implanting the plate.
- the bridge 5 has grooves or teeth 26 on its upper surface for integration with the bone.
- the respective slide bodies 8 and 18 for the ball and socket, respectively are slipped into their dovetail grooves and are adjusted laterally relative to each other and locked with the associated screws 21, 22. If required, in addition to the vertical adjustment possibility provided by the links, additional vertical adjustment can be achieved by varying the thickness of the upper bridge 5 and/or the slide body 8.
- Suitable modi ⁇ fication of the anchoring means e.g. the plate 1 and the sleeves 2, can enable the joint to be used for elbows, shoulders, etc.
- the material in all of the joint components, except for the socket, is titanium.
- the ball is suitably made of Titanium 6 AL 4Vm which is tempered and possibly ion- -nitrated or otherwise surface-hardened. All of the other titanium components are made of titanium GRADE 1.
- the socket is made of polyethylene, and can be porous and impregnated with HEALON.
Abstract
Ankle prosthesis with titanium components, comprising a ball (19) and a socket (10), joined to anchoring means (1, 2) designed to be surgically implanted in the tibia and in the talus. Via intermediate connecting elements (5, 12) with dovetail grooves (6, 13) arranged perpendicular to each other, lateral adjustment is made possible between the ball and the socket.
Description
Artificial joint , especially for ankle joints
The present invention relates to a joint prosthesis. -1 comprising a ball and a socket, surgically implantable anchoring means for the ball and the socket, and connect¬ ing elements by means of which the ball and the socket can 5 be fixed to their respective anchoring means.
Since it was found that titanium is a biocompatible material, to which human bone tissue adheres after im¬ plantation in a bone, ankle prostheses, for example, of 10 titanium have been developed. In a known ankle prosthesis of the type described by way of introduction, anchoring means in the form of titanium plates are used, which, in a first operation, are inserted and screwed securely to the tibia and talus. When the anchoring means after a certain 15 period of time have become integrated with the bone, a second operation is performed in which the ends of the bones are cut off, whereafter the ball and the socket are screwed securely to the anchoring means which are inte¬ grated with the bones. Since it is impossible to determine 20 . ahead of time the exact position of the anchoring means after it has become integrated with the bone, the surgeon must, at the second operation, either have access to an assortment of different joint components to be certain to find a ball and a socket which will be correctly aligned 25 with each other in view of the positions of the anchoring means, or he must be able during the operation to work on the components of the joint prosthesis in order to achieve a proper fit. This is time consuming and often involves having to accept minor deviations from an ideal alignment. 30
The purpose of the present invention is to provide a joint prosthesis of the type described by way of introduction, which eliminates the need for working up the components or having a variety of different prosthesis components during 35 the second operation. At the same time, it is intended to
provide a guite exact fit between the socket and the ball.
This is achieved according to the invention in a joint prosthesis of the type described by way of introduction by virtue of the fact that the connecting elements comprise means permitting relative lateral displacement of the ball and of the socket relative to the associated connected element, means for locking the ball and the socket into the respective connecting element after adjustment of the ball and the socket in relation to each other, and means arranged to permit vertical adjustment of the distance between at least one of the anchoring means and associated connecting element.
Complete relative adjustment capability is provided quite simply by providing dovetail grooves running perpendicular to each other and integral with the respective element and by providing the ball and the socket with guide means adapted to these grooves. This provides adjustability along the x- and y-axeβ, while adjustment along the z-axes can be achieved by adjusting the height or thickness of components in one or both of the connecting elements.
The invention will be described in more detail with refer- ence to an example shown in the accompanying drawing, where Figure l shows a partially sectioned side view of an ankle prosthesis according to the invention, and Figure 2 shows a front view of the ankle prosthesis in Figure 1.
The ankle prosthesis according to the invention comprises upper and lower anchoring means in the form of a plate l and a pair of externally and internally threaded sleeves
2 . The plate 1 is provided at. its lower end with a bead 3 of circular cross-section, which is disposed in a circular groove 4 in a connecting element in the form of a bridge 5, having a dovetail groove 6 extending perpendicular to the circular groove 4. In the dovetail groove 6, there is
received a slide body 8 having the same profile as the groove 6 and integral with a plate 7. The plate 7 has a depression 9, in which the ankle joint socket 10 is fixed, e.g. by adhesive. The arrangement described makes the 5 socket 10 displaceable laterally relative to the anchoring plate l. The connection via the bead 3 and the groove 4 makes possible a minor angular adjustment of the bridge 5 relative to the plate 1.
10 A connecting element in the form of a second bridge 12 with a dovetail groove 13 is joined to the sleeves 2 by means of four links or legs 14. The links 14 are screwed securely to the bridge 12 and the sleeves 2 with the aid of upper screws 15 which are screwed into the threaded
15 bores 16 in the bridge, and lower screws 17 which are screwed into the sleeves 2. A slide body 18 on a hemi¬ spherical body 19 serving as a joint ball is received in the groove 13 and permits displacement of the ball in the longitudinal direction of the sleeves 2. The slide bodies
20 8 and 18 are lockable in their respective grooves 6 and 13 by means of stop screws, e.g. socket-head screws 21, 22, which are screwed into threaded through-bores 23 and 24, respectively, to the respective dovetail groove 6 and 13, respectively.
25
The ankle prosthesis described is implanted in two opera¬ tions. In the first operation, the plate l is implanted into the tibia and the sleeves 2 are implanted in the talus. The plate 1 is provided with evenly spaced holes 20
30 over its entire surface, and the surface is also grooved. The holes and the grooves promote maximum bone integra¬ tion. The sleeves 2 are preferably also provided with holes or perforations (not shown).
35 When the plate 1 and the sleeves 2 have become integrated with the bone, which takes approximately four months. X-rays can determine the exact position of the components
and determine the length and the angular positioning of the links 14 in order to obtain the correct vertical distance between the ball 19 and the socket 10. During the second operation, the lower bridge 12 is fixed to the talus with the aid of the screws 15 and 17 and the links 14. The bridge 12 is provided on its underside with grooves or teeth 25 for integration with the bone. If the sleeves 2 are perforated, the lower screws 17 will also eventually become integrated with the bone.
The tibia is now shortened so that the cylindrical end surface 3 is exposed and it is slid into the cylindrical groove 4 in the bridge 5. This connection permits com¬ pensation for minor angular errors when implanting the plate. The bridge 5 has grooves or teeth 26 on its upper surface for integration with the bone. After mounting the bridges 5, 12, the respective slide bodies 8 and 18 for the ball and socket, respectively, are slipped into their dovetail grooves and are adjusted laterally relative to each other and locked with the associated screws 21, 22. If required, in addition to the vertical adjustment possibility provided by the links, additional vertical adjustment can be achieved by varying the thickness of the upper bridge 5 and/or the slide body 8.
The above invention has been described in an embodiment particularly intended for an ankle joint. Suitable modi¬ fication of the anchoring means, e.g. the plate 1 and the sleeves 2, can enable the joint to be used for elbows, shoulders, etc.
The material in all of the joint components, except for the socket, is titanium. The ball is suitably made of Titanium 6 AL 4Vm which is tempered and possibly ion- -nitrated or otherwise surface-hardened. All of the other titanium components are made of titanium GRADE 1. The socket is made of polyethylene, and can be porous and impregnated with HEALON.
Claims
1. Joint prosthesis, comprising a ball and a socket, surgically implantable anchoring means for the ball and socket, and connecting elements, by means of which the ball and socket can be fixed to their respective anchoring means, c h a r a c t e r i z e d in that the connecting elements (5, 12) comprise means (6, 8, 13, 18) permitting relative lateral displacement of the ball (19) and of the socket (10) relative to the associated connecting element, means (21, 22) for locking the ball and the socket onto the respective connecting element after adjustment of the ball and the socket in relation to each other, and means (14) arranged to permit vertical adjustment of the dis¬ tance between at least one (2) of the anchoring means and the associated connecting element (12).
2. Joint prosthesis according to Claim l, c h a r a c t ¬ e r i z e d in that the connecting elements (5, 12) have dovetail grooves (6, 13), and that the ball (19) and the socket (10) have slide portions (8, 18) fitting the grooves.
3. Joint prosthesis according to Claim 2, c h a r a c t ¬ e r i z e d in that the dovetail grooves (6, 13) are so oriented on their respective connecting elements (5, 12) that they extend essentially perpendicular to each other when the components are in their implanted state.
4. Joint prosthesis according to one of Claims 1-3, c h a r a c t e r i z e d in that the anchoring means (1, 2), the connecting elements (5, 12) and the ball (19) are made of titanium, and the socket (10) of polyethylene.
5. Joint prosthesis according to one of Claims 1-4 for an ankle, c h a r a c t e r i z e d in that one of the anchoring means (1) is formed of a plate intended to be inserted into a vertical slot in the tibia and has a pro¬ filed edge portion (3) which, after the integration of the plate with the tibia, is intended to be inserted into a groove (4) in the associated connecting element (5), said profiled edge portion and the groove being disposed to permit a certain angular movement between the plate and the connecting element.
6- Joint prosthesis according to Claim 5, c h a r a c t ¬ e r i z e d in that the other anchoring means (2) is formed of a pair of internally threaded sleeves, intended to be implanted in the talus, that the associated connect¬ ing element (12) comprises links (14), which are intended to be screwed securely to the sleeves after the integra¬ tion of the sleeves with the bone.
7- Joint prosthesis according to Claim 6, c h a r a c t ¬ e r i z e d in that the plate (l) and the sleeves (2) are perforated.
8. Joint prosthesis according to Claims 5 and 6, c h a r a c t e r i z e d in that the socket (10) and the ball (19) have guide members (8, 18) which, when the com- ponentβ have been implanted, are received in dovetail grooves (6, 13) in the respective connecting element (5, 12), which grooves are oriented essentially perpendicular to each other.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8904036-4 | 1989-11-29 | ||
SE8904036A SE8904036L (en) | 1989-11-29 | 1989-11-29 | LED PROTES, IN PARTICULAR, FOOT LEADER |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991007931A1 true WO1991007931A1 (en) | 1991-06-13 |
Family
ID=20377642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1990/000791 WO1991007931A1 (en) | 1989-11-29 | 1990-11-29 | Artificial joint, especially for ankle joints |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0455778A1 (en) |
JP (1) | JPH04503178A (en) |
SE (1) | SE8904036L (en) |
WO (1) | WO1991007931A1 (en) |
Cited By (40)
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FR2684291A1 (en) * | 1991-12-03 | 1993-06-04 | Ysebaert | Ankle prosthesis |
US5314477A (en) * | 1990-03-07 | 1994-05-24 | J.B.S. Limited Company | Prosthesis for intervertebral discs and instruments for implanting it |
US5443516A (en) * | 1989-04-11 | 1995-08-22 | Albrektsson; Bjoern | Joint prosthesis |
FR2759900A1 (en) * | 1997-02-26 | 1998-08-28 | Sem Sa | Ancillary instrument for fitting components of ankle joint prosthesis |
US7323012B1 (en) * | 2004-03-17 | 2008-01-29 | Biomet Manufacturing Corp. | Ankle implant |
EP1915975A1 (en) * | 2006-10-26 | 2008-04-30 | Newdeal | Ankle prosthesis with neutral position adjustment |
US20090082875A1 (en) * | 2007-09-26 | 2009-03-26 | Depuy Products, Inc. | Talar implant system and method |
US7915046B2 (en) | 2004-06-30 | 2011-03-29 | Depuy Products, Inc. | System and method for determining the operating state of orthopaedic admixtures |
US7935118B2 (en) | 2002-06-21 | 2011-05-03 | Depuy Products, Inc. | Prosthesis removal cutting guide, cutting tool and method |
CN102125473A (en) * | 2011-04-18 | 2011-07-20 | 张纯朴 | Absorbable ankle fusion device |
US8034115B2 (en) | 1999-10-22 | 2011-10-11 | Inbone Technologies, Inc. | Ankle replacement system |
US8303667B2 (en) | 2010-03-02 | 2012-11-06 | Alastair Younger | Fastening system for prostheses |
US8491596B2 (en) | 2002-06-21 | 2013-07-23 | Depuy Products, Inc. | Method for removal of bone |
US8715362B2 (en) | 2005-03-14 | 2014-05-06 | Inbone Technologies, Inc. | Ankle replacement system |
US8858635B2 (en) | 2004-02-04 | 2014-10-14 | Ldr Medical | Intervertebral disc prosthesis |
CN104887359A (en) * | 2015-06-29 | 2015-09-09 | 北京贝思达生物技术有限公司 | Artificial ankle joint |
US9265618B2 (en) | 2005-11-30 | 2016-02-23 | Ldr Medical | Intervertebral disc prosthesis and instrumentation for insertion of the prosthesis between the vertebrae |
US9278006B2 (en) | 2006-10-26 | 2016-03-08 | European Foot Platform Sc | Ankle prosthesis with neutral position adjustment |
US9320609B2 (en) * | 2002-06-27 | 2016-04-26 | Lew C. Schon | Semi-constrained ankle joint prosthesis and its method of implantation |
US9333095B2 (en) | 2001-05-04 | 2016-05-10 | Ldr Medical | Intervertebral disc prosthesis, surgical methods, and fitting tools |
US9675389B2 (en) | 2009-12-07 | 2017-06-13 | Samy Abdou | Devices and methods for minimally invasive spinal stabilization and instrumentation |
US9949839B2 (en) | 2013-03-13 | 2018-04-24 | Wright Medical Technology, Inc. | Revision implant augments, systems, and methods |
US10136998B2 (en) | 2016-08-30 | 2018-11-27 | Wright Medical Technology, Inc. | Revision total ankle implants |
US10188528B2 (en) | 2007-02-16 | 2019-01-29 | Ldr Medical | Interveterbral disc prosthesis insertion assemblies |
US10226355B2 (en) | 2004-12-22 | 2019-03-12 | Ldr Medical | Intervertebral disc prosthesis |
US10350088B2 (en) | 2005-06-29 | 2019-07-16 | Ldr Medical | Instrumentation and methods for inserting an intervertebral disc prosthesis |
US10492919B2 (en) | 2005-09-23 | 2019-12-03 | Ldr Medical | Intervertebral disc prosthesis |
US10548740B1 (en) | 2016-10-25 | 2020-02-04 | Samy Abdou | Devices and methods for vertebral bone realignment |
US10575961B1 (en) | 2011-09-23 | 2020-03-03 | Samy Abdou | Spinal fixation devices and methods of use |
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US10695105B2 (en) | 2012-08-28 | 2020-06-30 | Samy Abdou | Spinal fixation devices and methods of use |
US10751187B2 (en) | 2007-06-08 | 2020-08-25 | Ldr Medical | Intersomatic cage, intervertebral prosthesis, anchoring device and implantation instruments |
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US10973648B1 (en) | 2016-10-25 | 2021-04-13 | Samy Abdou | Devices and methods for vertebral bone realignment |
US11006982B2 (en) | 2012-02-22 | 2021-05-18 | Samy Abdou | Spinous process fixation devices and methods of use |
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US11173040B2 (en) | 2012-10-22 | 2021-11-16 | Cogent Spine, LLC | Devices and methods for spinal stabilization and instrumentation |
US11179248B2 (en) | 2018-10-02 | 2021-11-23 | Samy Abdou | Devices and methods for spinal implantation |
US11219529B2 (en) * | 2012-11-12 | 2022-01-11 | Wright Medical Technology, Inc. | Stabilized total ankle prosthesis |
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Cited By (69)
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US5443516A (en) * | 1989-04-11 | 1995-08-22 | Albrektsson; Bjoern | Joint prosthesis |
US5314477A (en) * | 1990-03-07 | 1994-05-24 | J.B.S. Limited Company | Prosthesis for intervertebral discs and instruments for implanting it |
FR2684291A1 (en) * | 1991-12-03 | 1993-06-04 | Ysebaert | Ankle prosthesis |
FR2759900A1 (en) * | 1997-02-26 | 1998-08-28 | Sem Sa | Ancillary instrument for fitting components of ankle joint prosthesis |
US9629730B2 (en) | 1999-10-22 | 2017-04-25 | Inbone Technologies, Inc. | Ankle replacement system |
US9308097B2 (en) | 1999-10-22 | 2016-04-12 | Inbone Technologies, Inc. | Ankle replacement system |
US8048164B2 (en) | 1999-10-22 | 2011-11-01 | Inbone Technologies, Inc. | Ankle replacement system |
US8034115B2 (en) | 1999-10-22 | 2011-10-11 | Inbone Technologies, Inc. | Ankle replacement system |
US9333095B2 (en) | 2001-05-04 | 2016-05-10 | Ldr Medical | Intervertebral disc prosthesis, surgical methods, and fitting tools |
US8491596B2 (en) | 2002-06-21 | 2013-07-23 | Depuy Products, Inc. | Method for removal of bone |
US7935118B2 (en) | 2002-06-21 | 2011-05-03 | Depuy Products, Inc. | Prosthesis removal cutting guide, cutting tool and method |
US9320609B2 (en) * | 2002-06-27 | 2016-04-26 | Lew C. Schon | Semi-constrained ankle joint prosthesis and its method of implantation |
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US7323012B1 (en) * | 2004-03-17 | 2008-01-29 | Biomet Manufacturing Corp. | Ankle implant |
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US10226355B2 (en) | 2004-12-22 | 2019-03-12 | Ldr Medical | Intervertebral disc prosthesis |
US8715362B2 (en) | 2005-03-14 | 2014-05-06 | Inbone Technologies, Inc. | Ankle replacement system |
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US9629726B2 (en) | 2005-03-14 | 2017-04-25 | Inbone Technologies, Inc. | Ankle replacement system |
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US9278006B2 (en) | 2006-10-26 | 2016-03-08 | European Foot Platform Sc | Ankle prosthesis with neutral position adjustment |
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Also Published As
Publication number | Publication date |
---|---|
EP0455778A1 (en) | 1991-11-13 |
SE8904036D0 (en) | 1989-11-29 |
SE8904036L (en) | 1991-05-30 |
JPH04503178A (en) | 1992-06-11 |
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