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GB2392097A - Total wrist prosthesis - Google Patents

Total wrist prosthesis Download PDF

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Publication number
GB2392097A
GB2392097A GB0215752A GB0215752A GB2392097A GB 2392097 A GB2392097 A GB 2392097A GB 0215752 A GB0215752 A GB 0215752A GB 0215752 A GB0215752 A GB 0215752A GB 2392097 A GB2392097 A GB 2392097A
Authority
GB
United Kingdom
Prior art keywords
component
carpal
radial
intermediate component
wrist prosthesis
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.)
Pending
Application number
GB0215752A
Other versions
GB0215752D0 (en
Inventor
Gareth Thomas
John Knowles Stanley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0215752A priority Critical patent/GB2392097A/en
Publication of GB0215752D0 publication Critical patent/GB0215752D0/en
Publication of GB2392097A publication Critical patent/GB2392097A/en
Pending legal-status Critical Current

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
    • A61F2/4261—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • 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
    • 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
    • A61F2002/30125—Rounded shapes, e.g. with rounded corners elliptical or oval
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • 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
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    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/30329—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
    • A61F2002/30354—Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/30316—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
    • A61F2002/30426—Bayonet coupling
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • 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
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • 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
    • A61F2002/3065—Details of the ball-shaped head
    • 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
    • A61F2002/30654—Details of the concave socket
    • A61F2002/30655—Non-spherical concave inner surface
    • 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
    • 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
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    • A61F2002/3079—Stepped or enlarged apertures, e.g. having discrete diameter changes
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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
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2/30—Joints
    • A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
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    • A61F2002/4264—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists for radio-carpal joints
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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
    • 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
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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
    • A—HUMAN NECESSITIES
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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
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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
    • A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (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)

Abstract

Total wrist prosthesis comprising a radial component 20 with a stem 22 for fixation into the radius, a carpal component 30 with one or more stems 32 for fixation into the capitate and an intermediate component 40 which allows rotational movement of the carpal component, and vertical and horizontal hinged movement of the radial component. Preferably the carpal component 30 has one or more apertures 33A, 33B to receive screws 34A, 34B for fixation into one or more carpals. The radial body may have a toroidal concave recess 23 or convex projection to engage with a corresponding projection 42 or recess on the intermediate component 40. The carpal body may have a projection 35 to engage an aperture 43 in the intermediate component 40. The carpal projection 35 may also have a pair of lugs 36A, 36B to engage in a groove 44 in the intermediate component 40 for secure connection.

Description

Title: Total Wrist Prosthesis The present invention relates to a total
wrist prosthesis.
Various wrist prosthesis have hitherto been known. Most of these allow for movement into two planes namely flexion and extension movement in a first plane, and ulnar deviation and radial deviation in another plane. However these do not allow for small rotational movements of the hand relative to the arm in a third plane. Also some prothesis parts are joined too loosely leading to disjointing problems.
The invention seeks to provide prosthesis which allows hand movements in three planes and which gives a reliable joint, reducing the chances of dislocation and/or loosening.
According to the present invention there is provided a total wrist prosthesis comprising: a) a proximal radial component having a radial body and a stem extending from one side of the body that allows fixation into the distal radius, b) a distal carpal component having a carpal body and one or more stems extending from one side of the body that allows fixation into the capitate, and c) an intermediate component, said intermediate being connected to said carpal component so as to allow rotational movement of the carpal component relative to the intermediate component where by to allow small rotational movements of the hand relative to the arm, and said intermediate component being
connected to the radial component so as to allow only vertical and horizontal hinged movement between the intermediate and radial component so as to allow for flexion and extension movement in a first plane and lunar and radiation movement in a second plane.
Preferably the carpal component has one or more apertures to receive screws for fixation into one or more carpals.
Preferably the radial body has a toroidal concave recess or convex projection on its side remote I from its shaft to engage with a toroidal convex projection or concave recess on the intermediate component. In one embodiment the radial body has an toroidal concave recess to engage with a toroidal convex projection on the intermediate component.
Preferably the carpal body has a projection on its side remote from its shafts which rotates in an aperture in the intermediate component.
In one embodiment the projection is generally cylindrical having a pair of opposed lugs extending from the cylindrical walls thereof, said projections being engaged in an annular groove in the intermediate component aperture to prevent separation of the carpal component from the intermediate component. The projections may slide through a side keyway in the intermediate component and rotate in the groove to assemble the intermediate component and carpal component together.
An embodiment of the invention will now be described with reference to the accompanying drawings in which: Figure IA and 1 B shows a perspective exploded view of a prosthesis from either end, Figure 2 shows a side view of Figure 1, Figure 3 shows an end view of Figure 1, Referring to Figures 1 to 3 there is shown a prosthesis 10. Prosthesis 10 has a proximal radial component 20, a distal carpal component 30, and an intermediate component 40.
Proximal radial component 20 may be formed from any suitable material such as a cobalt chrome alloy. Component 20 has a generally oval body 21, and a stem 22 extending from one side of the body that allows fixation into the distal radius. Part of the body and/or shaft may be coated with a textured bone ingrowth surface to provide a key for the bone as is known in the art.
Radial body 21 has a toroidal concave recess 23 on its side remote from its stem 22. The recess 23 has the largest radius of curvature over the body length and the smallest radius of curvature over the body width normal to the largest radius of curvature. Also as shown in dotted lines, one side and end wall of the body may be higher than its opposite side and end wall, e.g. to provide a 10 degree slope across the two side and two end walls, to reduce subluxion when the prosthesis is used.
Distal carpal component 30 may be formed from any suitable material such as a cobalt chrome alloy. Component 30 has a generally oval carpal body 31 and stem 32 extending from one side of the body 31 that facilitates location into the capitate. A pair of apertures 33A,33B are provided either side of stem 32 to receive screws to provide stabilization and fixation into the remaining carpal bones. Such screws may be locking screws e.g. of the type described in our co-pending application no, the content of which is imported into this specification by
reference. Accordingly apertures 33A,33B may be adapted to receive screws with collars 34A34B of the type described in this co-pending application. Again part of the body andlor shafts may be coated with a textured bone ingrowth surface to provide a key for the bone as is known in the art.
Carpal body 31 has a cylindrical projection 35 on its side remote from its stem 32 having a pair of opposed lugs 36A,36B extending from the cylindrical walls thereof Intermediate component 40 has an oval body 41 formed from ultra high molecular weight polyethylene to provide a low friction bearing surface against cobalt chrome. One side of body 41 has a toroidal projection 42. As shown in Figures 2 and 3, the projection has the largest radius of curvature over the body length and the smallest radius of curvature over the body width normal to the largest radius of curvature and these correspond to substantially the same radii of curvature of the recess 23 in radial body 21.
In use the ellipsoidal projection 42 and mating ellipsoidal recess 23 allow only vertical and horizontal hinged movement between the intermediate and radial component so as to allow for flexion and extension movement in a first plane and lunar and radiation movement in a second plane. On the opposite side of body 41 to projection 42 is a cylindrical aperture 43 having an annular groove 44 therein. Grooves 45A, 45B provide a keyway from the open end of aperture 43 into the annular groove 44. Carpal body 31 can be releasably connected to the intermediate component 40 by pushing the cylindrical projection 35 into cylindrical aperture 43 with lugs 36A,36B sliding in grooves 45A,45B, and then the body 41 is rotated through 90 degrees so that lugs 36A,36B enter annular groove 44. With lugs 36A36B in annular groove 44, separation of the carpal component from the intermediate component is prevented. In use this allows rotational movement of the carpal component relative to the intermediate component where by to allow small rotational movements of the hand relative to the arm.
The invention may take a form other than that specifically described above. For example the proximal component may connected to the intermediate component by another method. For example the toroidal (or other shape) recess could be on the intermediate component and the toroidal projection on the proximal component. Also other types of joints could be used to allow the distal component to rotate relative to the intermediate component.
Angling of the shaft 22 provides good anatomical compliance and support the prosthesis during flexion and extension to prevent volar dislocation. Also the toroidal projection and recess on the intermediate and proximal component respectively is designed to mimic anatomic movement.
Further modifications will be apparent to those skilled in the art without departing from the scope of the present invention.

Claims (8)

1. A total wrist prosthesis comprising: a) a proximal radial component having a radial body and a stem extending from one side of the body that allows fixation into the distal radius, b) a distal carpal component having a carpal body and one or more stems extending Tom one side of the body that allows fixation into the capitate, and c) an intermediate component, said intermediate being connected to said carpal component so as to allow rotational movement of the carpal component relative to the intermediate component where by to allow small rotational movements of the hand relative to the arm, and said intermediate component being connected to the radial component so as to allow only vertical and horizontal hinged movement between the intermediate and radial component so as to allow for flexion and extension movement in a first plane and lunar and radiation movement in a second plane.
2. A total wrist prosthesis according to claim 1, wherein the carpal component has one or more apertures to receive screws for fixation into one or more carpals.
3. A total wrist prosthesis according to claim I or 2, wherein the radial body has a toroidal concave recess or convex projection on its side remote from its shaft to engage with a toroidal convex projection or concave recess on the intermediate component.
4. A total wrist prosthesis according to claim 3, wherein the radial body has a toroidal concave recess to engage with a toroidal convex projection on the intermediate component.
5. A total wrist prosthesis according to any preceding claim, wherein the carpal body has a projection on its side remote from its shafts which rotates in an aperture in the intermediate component.
6. A total wrist prosthesis according to claim 5, wherein the projection is generally cylindrical having a pair of opposed lugs extending from the cylindrical walls thereof, said projections being engaged in an annular groove in the intermediate component aperture to prevent separation of the carpal component from the intermediate component.
7. A total wrist prosthesis according to claim 6, wherein the projections may slide through a side keyway in the intermediate component and rotate in the groove to assemble the intermediate component and carpal component together. i
S. A total wrist prosthesis substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB0215752A 2002-06-29 2002-06-29 Total wrist prosthesis Pending GB2392097A (en)

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US7625408B2 (en) * 2003-07-22 2009-12-01 Avanta Orthopaedics, Llc Prosthetic wrist implant
FR3005567A1 (en) * 2013-05-16 2014-11-21 Groupe Lepine PROSTHETIC FOR RESURFACING THE DISTAL RADIUS
US9078758B2 (en) 2011-05-12 2015-07-14 Howmedica Osteonics Corp. Wrist implant for carpal hemiarthroplasty
CN105434086A (en) * 2016-02-01 2016-03-30 中南大学湘雅医院 Wrist joint implant
CN105434085A (en) * 2016-01-11 2016-03-30 王金成 3D printed individualized customized full wrist joint and manufacturing method thereof
EP3005989A1 (en) 2014-10-09 2016-04-13 Groupe Lepine Implant for resurfacing the distal radius

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Publication number Priority date Publication date Assignee Title
US7625408B2 (en) * 2003-07-22 2009-12-01 Avanta Orthopaedics, Llc Prosthetic wrist implant
US7628819B2 (en) * 2003-07-22 2009-12-08 Avanta Orthopaedics, Llc Prosthetic wrist implant
US8118876B2 (en) 2003-07-22 2012-02-21 Avanta Orthopaedics, Llc Prosthetic wrist implant
US8758445B2 (en) 2003-07-22 2014-06-24 Avanta Orthopaedics, Llc Prosthetic wrist implant
US9233004B2 (en) 2003-07-22 2016-01-12 Howmedica Osteonics Corp. Prosthetic wrist implant
US9078758B2 (en) 2011-05-12 2015-07-14 Howmedica Osteonics Corp. Wrist implant for carpal hemiarthroplasty
FR3005567A1 (en) * 2013-05-16 2014-11-21 Groupe Lepine PROSTHETIC FOR RESURFACING THE DISTAL RADIUS
FR3005568A1 (en) * 2013-05-16 2014-11-21 Groupe Lepine RESURFACING IMPLANT OF DISTAL RADIUS
EP3005989A1 (en) 2014-10-09 2016-04-13 Groupe Lepine Implant for resurfacing the distal radius
CN105434085A (en) * 2016-01-11 2016-03-30 王金成 3D printed individualized customized full wrist joint and manufacturing method thereof
CN105434086A (en) * 2016-02-01 2016-03-30 中南大学湘雅医院 Wrist joint implant
CN105434086B (en) * 2016-02-01 2017-05-17 中南大学湘雅医院 Wrist joint implant

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