Tim Holsgrove

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In-Vitro Study of Medial Strain Distribution in the Femur during Impaction Bone Grafting in Relation to Revision Hip Arthroplasty Procedures
The aim of this study was to investigate the strain distribution on the medial side of the femur during impaction grafting and the subsequent stability of the stem under uniaxial cyclic loading. The Exeter IBG technique was used in conjunction with Howmedica X-change instrumentation. SawbonesA composite femora were used. An impactometer, which provides a known impaction energy and momentum, was used to standardize the impaction process. In-vitro medial hoop strains and the number of impacts were recorded. A drop height of 260 mm was found to provide sufficient energy for impaction without introducing excessive strains to achieve implant stability.

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