Thompson Hemiarthroplasty for Femoral Neck Fracture Is Associated With Increased Risk of Dislocation

Area of Science:

• Orthopedic Surgery
• Biomaterials Science

Background:

• Hip hemiarthroplasty is a common procedure for femoral neck fractures.
• Dislocation is a significant complication following hip hemiarthroplasty.

Purpose of the Study:

• To evaluate patient factors, prosthesis selection, and implant characteristics influencing hip hemiarthroplasty dislocation risk.
• To identify specific implants associated with increased dislocation rates.

Main Methods:

• Retrospective review of 4116 hip hemiarthroplasties for femoral neck fractures (2009-2017).
• Analysis of patient demographics, implant types (Furlong, Exeter, Thompson, Austin-Moore), and dislocation events.
• Statistical analysis to determine predictors of dislocation.

Main Results:

• A 1.5% dislocation rate (63/4116) was observed.
• Thompson hemiarthroplasties showed significantly higher dislocation rates (3.7%) compared to other implants.
• Patient age, gender, cognitive status, and ASA grade were not significant predictors of dislocation.

Conclusions:

• Thompson hip hemiarthroplasties are associated with increased dislocation risk.
• Implant choice is a critical factor in managing dislocation risk after hip hemiarthroplasty.