Mit Hilfe eines Kniesimulators soll das tribologische Verhalten einzelner Prothesenmodelle ermittelt werden. Hierfür ist es erforderlich, die Bewegungs-und Belastungsverläufe des natürlichen Knies möglichst genau nachzuahmen. Um die tribologischen Auswirkungen konstruktiver Details von verschiedenartigen Prothesenmodellen zu erfassen, dient eine systematische Konstruktionsanalyse. Die damit erarbeiteten Haupteinflußgrößen können zur Optimierung von neuen Prothesen beitragen.By means of a knee Simulator the tribological behaviour of different types of prostheses shall be investigated. Therefore it is necessary to simulate the movement :and loading pattern of a natural knee äs exact äs possible. To Understand the tribological effects of design details of different prosthesis models a systematical construction analysis ist foreseen. The main influence Parameters, worked out herewith, can contribute to optimize new prostheses.
In some theoretical and clinical examinations a supporting screw in condylar and other angular plate osteosyntheses devices is proposed to increase the weight bearing capacity. We examined the weight bearing of a condylar plate with "U" and double "T" blade profile with and without supporting screw. The weight bearing capacity in the condylar plate with "U" profile was 450 +/- 350 N without and 550 +/- 450 N with supporting screw. In the condylar plate groups with "double T" profile the weight bearing capacity was 1350 +/- 1250 N in the group without and 1400 +/- 1300 N in the group with supporting screw. We concluded that the introduction of a supporting screw cannot improve significantly the weight bearing capacity of condylar plate osteosynthesis.
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