Fig. 4From: Treatment of the surgical neck fracture of the humerus with a novel external fixator in the elderly with osteoporosis: biomechanical analysisCompression and torsion experiments and data acquisition for the external fixator group. A gradually-increasing load from 0 to 200 N was applied at a loading rate of 1.4 mm/min. The values of multiple strain gages at both sides of the broken ends were simultaneously acquired. The specimens were rotated for 6 cycles or until damagedBack to article page