Instability in total hip arthroplasty: A literature review

Abstract

Purpose: To introduce prevention and treatment methods for instability after total hip arthroplasty (THA) on the basis of the results of several recent studies. Methods: We comprehensively summarized and evaluated the results of several studies on the frequency, causes, countermeasures, and treatments after THA. Results: We found that surgeon experience, mobility of the lumbosacral spine, and femoral head size influence the dislocation rate after THA, and that dual-mobility acetabular components, lipped liners, and intraoperative support systems, including navigation and robotics, can decrease the dislocation rate. Conclusions: Dual-mobility and lipped liners improve stability after THA; however, their indications should be carefully considered. Judicious use of postoperative mobility restriction may benefit some patients.

Keywords

• Dislocation rate after total hip arthroplasty
• Dual mobility acetabular components
• Intraoperative support system