[Experimental findings and a new screw endoprosthesis of the hip joint].
Based on his own experimental findings, the author provides strong evidence for negative consequences of the deranged vascular network of haversian systems while screwing the screw pedicles of hip joint endoprostheses into the endostalic margin of the cortical layer of the diaphysis. It is shown that it is not advisable to use a endoprosthetic assembly unit in the intertrochanteric area for biomechanical reasons. The latest endoprosthesis of the author's own design, which has a monolithic transition of the neck into the pedicle, is described, with emphasis on driving the endoprosthetic screw pedicle into the diaphysis rather than on its screwing. The prosthesis has a pedicle with a specific trapezoidal thread and a knock-down mobility unit.
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D000818:Animals; D001696:Biomechanical Phenomena; D001863:Bone Screws / Q000009:adverse effects; D004285:Dogs; D006622:Hip Prosthesis / Q000009:adverse effects / Q000295:instrumentation*