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1. WO1996003939 - ASYMMETRIC FEMORAL PROSTHESIS

Publication Number WO/1996/003939
Publication Date 15.02.1996
International Application No. PCT/US1995/009705
International Filing Date 01.08.1995
Chapter 2 Demand Filed 09.02.1996
IPC
A61F 2/38 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters 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
02Prostheses implantable into the body
30Joints
38for elbows or knees
CPC
A61F 2/3859
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters 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
02Prostheses implantable into the body
30Joints
38for elbows or knees
3859Femoral components
A61F 2/3877
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS 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
2Filters 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
02Prostheses implantable into the body
30Joints
38for elbows or knees
3877Patellae or trochleae
Applicants
  • SMITH & NEPHEW RICHARDS, INC. [US/US]; 1450 Brooks Road Memphis, TN 38116-1892, US (AllExceptUS)
  • RIES, Michael [US/US]; US (UsOnly)
  • SCHUMACHER, Brian [US/US]; US (UsOnly)
Inventors
  • RIES, Michael; US
  • SCHUMACHER, Brian; US
Agents
  • KRIEGER, Paul, E. ; Pravel, Hewitt, Kimball & Krieger 10th floor 1177 West Loop South Houston, TX 77027-9095, US
Priority Data
08/285,91704.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ASYMMETRIC FEMORAL PROSTHESIS
(FR) PROTHESE FEMORALE ASYMETRIQUE
Abstract
(EN)
A knee prosthesis includes a femoral prosthesis member (60) having anterior (12), distal (15), and posterior (13, 14) articulating surface portions. The articulating surface portions comprising a pair of condylar surface portions (13, 14, 61, 62) that are positioned at differing distances from the non-articulating surface plane. In one form the posterolateral articulating surface is a greater distance away from the anterior non-articulating surface than the posteromedial articulating surface (Figs. 1 and 15). The femoral prosthesis has a non-articulating surface that includes a plurality of intersecting surfaces including at least distal (23, 24), anterior (17, 18), and posterior (20, 21) surfaces for receiving the patient's distal femur after it has been surgically prepared. A tibial component (50) has concave articulating surfaces that receive the femoral component articulating surface portions during use. The angle of femoral rotation generally about the mechanical axis generally changes when going through a normal range of motion of the patient's knee while maintaining alignment of the femoral and tibial articular surfaces. The femoral prosthesis also has a proximal anterior region (65) that is concave (Fig. 19). An improved patella groove design is also shown (Figs. 20-24).
(FR)
Prothèse du genou comprenant un élément de prothèse fémorale (60) comportant des parties de surfaces articulaires antérieure (12), distale (15), et postérieures (13, 14). Les parties de surfaces articulaires comprennent une paire de parties de surface condyliennes (13, 14, 61, 62) qui sont positionnées à des distances différentes du plan de surface non articulaire. Dans une forme d'exécution, la surface articulaire postérolatérale est située à une plus grande distance de la surface antérieure non articulaire que la surface articulaire postéromédiale (fig. 1 et 15). La prothèse fémorale présente une surface non articulaire qui comporte un ensemble de surfaces d'intersection comprenant au moins des surfaces distales (23, 24), antérieures (17, 18) et postérieure (20, 21) recevant la partie distale du fémur du patient après sa préparation chirurgicale. Un composant tibial (50) présente des surfaces articulaires concaves recevant les parties de surfaces articulaires du composant fémoral pendant l'utilisation. L'angle de rotation fémorale généralement autour de l'axe mécanique change généralement dans une plage de mouvements normaux du genou du patient, tout en maintenant l'alignement des surfaces articulaires fémorales et tibiales. Cette prothèse fémorale présente également une région antérieure proximale (65) qui est concave (fig. 19). On présente également une structure perfectionnée à cannelure patellaire (fig. 20-24).
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