[The external ring fixation--experimental studies of bending stability in distraction osteosyntheses].

There is a high axial load for lower leg distractive osteosyntheses with external fixation systems. In searching for a high rigidity comparative investigations on the stability with different external fixators were carried out by an own-developed material testing machine. Our anular fixator showed more rigidity than a three-dimensional ASIF-external fixateur. The use for infected fractures by changing the treatment, pseudarthrosis and also distractive osteosyntheses with weight bearing (for example Ilisarov-method) is possible.