[Basic studies on ultrasonic surgery. II. Studies on the stability after ultrasonic osteosynthesis in various forms of fractures in vitro].

Investigations on the load capacity of an ultrasonic weld in transverse fractures, oblique fractures, and multiple fragment fractures by means of homologous bone fragments and Fimomed were taken up in vitro on 84 human femur diaphyses. It was possible to demonstrate the essential influence of the form of the fracture on the stability of the weld. The mechanical density was the highest in transverse fractures, small in oblique fractures, and the smallest in multiple fragment fractures. Conclusions were drawn up for the clinical use.