[Investigations of strength of tibia osteosynthesis (author's transl)].

Transverse strength of tibia osteosynthesis with wire bracings, nails, screws and self-tensed pressure plates was determined in biomechanical researches. The mechanical limits determined of the various kinds of osteosynthesis were compared with calculated transverse moments that are found at early mobilisation. The osteosynthesis with 3 single wire bracings shows neither sufficient rotary nor bending stability, however, the osteosynthesis with 3 twin wire bracings appears to be sufficient providing participation of medical guidance and possible inactive support is assured. The osteosynthesis with the modified Küntscher nail is only stable under additional utilization of bone weight and muscle power. The nailing is not stable without muscular guarantee. The osteosynthesis with screws and self-tensed pressure plates is sufficient stable, additional application of the broad plate is not necessary because of over dimension.