System for producing a knee-joint endoprosthesis
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United States of America Patent
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-
Feb 16, 1999
Issued Date -
N/A
app pub date -
Nov 8, 1996
filing date -
Nov 23, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
System to produce a knee-joint endoprosthesis with joint elements (10) are constructed to be attached to the lower end of the femur, and have a convexly curved joint bearing surface. Bearing elements (12) are constructed to be attached to the upper end of the tibia (11). A meniscus (14) is movably disposed between each femoral joint element (10) and tibial bearing element (12) and are provided on its upper and lower sides with sliding surfaces complementary in shape to the associated joint bearing surface of the femoral joint element (10) and the associated bearing surface of the tibial bearing element (12), respectively. The peripheral or sagittally outer boundary (16) of the sliding surfaces (15) of the menisci (14) that face the femoral joint elements (10) is higher than their central or sagittally inner boundary. The system is designed for modular, universally compatible supplementation to form a total knee prosthesis, revision prosthesis or femoropatellar joint prosthesis.
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