Trevor H Magee, Jordan F Schaeffer, Daniel S Buck, Jeremy M Gililland and Aaron A Hofmann
Dislocation is one of the most common complications of total hip arthroplasty. The diameter of the femoral head is one of the more important of the variables under the control of the surgeon. We followed 527 total hip arthroplasties in 469 patients after primary total hip arthroplasty with femoral head sizes ranging from 28 to 44 mm. All surgeries were performed by a single surgeon at one institution. The operative approach was the posterior approach in all patients. The patients were followed at defined intervals and asked about dislocation. There was a mean follow up of 60 months with a range of 12 to 138 months. In total hip arthroplasty, utilizing the posterior approach, we found no statistically significant association between the risk of dislocation and femoral head size.