[Dislocation of total hip endoprosthesis with special reference to various techniques]

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Clinical Research

Background:

• Total hip replacement (THR) is a common procedure for treating hip arthritis.
• Dislocation is a significant complication following THR, impacting patient outcomes.
• Understanding risk factors is crucial for improving surgical techniques and patient safety.

Purpose of the Study:

• To analyze the incidence of dislocation after primary total hip replacement.
• To compare dislocation rates between posterior and transgluteal surgical approaches.
• To identify factors influencing dislocation risk in THR.

Main Methods:

• Retrospective review of 1238 primary total hip replacements performed between 1980 and 1988.
• Data collection on patient demographics, prosthesis type, surgical approach, and postoperative treatment.
• Statistical analysis to compare dislocation rates between different surgical approaches.

Main Results:

• A total of 26 dislocations (2.1%) were recorded.
• The posterior approach had a significantly higher dislocation rate (3.1%) compared to the transgluteal approach (1.2%).
• No significant differences in dislocation rates were observed based on age, sex, prosthesis type, or postoperative treatment.

Conclusions:

• The posterior approach for primary total hip arthroplasty is associated with a higher risk of dislocation.
• Surgeons should be aware of this increased risk when performing the posterior approach.
• Early postoperative dislocations often occur due to leg rotation or deep sitting positions.