Influence of various physical and mechanical factors on the fate of joint implant and its functional capacities

Abstract

The artificial and natural joints are biomechanically adequate due to their similar technical characteristics. The tribological characteristics are responsible for joint mobility. With high material abrasion resistance, a low friction coefficient cannot be achieved without greasing. If the friction coefficient can be reduced to the level typical of a healthy joint (0.008—0.04), one can expect a relevant decrease in breaking forces resulting in the friction point from slip resistance. In this case the safety margin generated on cement fixation will be sufficient for the service life of an implant to be 2—3 times higher than the currently available (the Chanley joint implants serve as many as 30 years). With these occurring events, the demand will decrease for a small number of cementless fixation joint implants and their application will be associated only with contraindications for cement use.

Keywords

joint endoprosthesis / friction knot / cemented fixation / cobalt / functionality

References

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