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Example of a fast healing nonunion. A 47-year-old patient was treated with the instrumented internal fixator for a delayed union, combined with a 17° internal torsional deformity six months after primary osteosynthesis with an unreamed nail and three months after dynamisation. In this graph, (a) the curve of the telemetrically measured elasticity of the osteosynthesis, anteroposterior radiographs (b) pre-operatively with a nail inserted, (c) immediately post-operatively, (d) five weeks post-operatively and (e) nine weeks post-operatively are shown. In this patient, a lag screw was applied, resulting in a high initial stability (low elasticity) which diminished at four weeks.


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An electronically instrumented internal fixator for the assessment of bone healing