Zurich cementless hip prosthesis and other modern trends in orthopedic surgery
نویسنده
چکیده
New concepts disclaim the use of cementum. They either use press fit or screw fixation to anchor the implants.The most important characteristics of the Zurich Cementless hip prosthesis, developed between 1993 and 2001, is avoidance of the coupling effect of the medial and lateral femoral cortices, and stress shielding due to compliance mismatch. The stem is fastened to the medial cortex with 4 to 5 screws. This instantly provides a stable fixation, which approximates the normal physiological stress distribution on the proximal femur. It allows bone remodeling around the screws.
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تاریخ انتشار 2010