[Methods for increasing fatigue strength of osteosynthesis plates].
For years metal implants are used for osteosynteses with good success. But there have been always fractures of implants, which need reosteosynteses in most cases. In publications an inadmissible high mechanical stress in the implants is responsible for the early failure. This stress is preponderant a reversed bending stress and leads then to fatigue fracture. In the technical practice shot peening and coining are used with success to improve the fatigue behaviour of dynamic stressed parts. It was obvious to research the effect of this treatments on the fatigue behaviour of implants too. Therefore reversed bending experiments of implants were carried out in the original state, after coining and after definite shot peening to obtain statistical calculated S-N-curves. The reversed bending amplitude without fracture of the coining implants increased 37% in opposition to original state. After shot peening this value even increased 111%.
D001860:Bone Plates; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D006801:Humans; D013314:Stress, Mechanical
Verfahren zur Erhöhung der Ermüdungsfestigkeit von Osteosyntheseplatten.