CORR Insights®: No Increase in Survival for 36-mm versus 32-mm Femoral Heads in Metal-on-polyethylene THA: A Registry Study

摘要

We are seeing more orthopaedic surgeons choosing to use the largest femoral head possible when performing THAs, undoubtedly to prevent against dislocation. Ironically, the founder of the operation, John Charnley, decreased the size of the head from 40 mm to 22 mm to reduce the frictional torque and thicken the cemented acetabulum polyethylene. Thanks to the development of highly crosslinked polyethylene (HXLPE), orthopaedic surgeons are far less concerned about friction [ ] than they seem to be about dislocation. But is our increased use of large femoral heads (> 32 mm) as a way of preventing a dislocation an overreaction? That is the question Tsikandylakis and colleagues [ ] addressed in the current study comparing 36 mm heads to 32 and 28 mm heads with data from the Combined Scandinavian Registries.