Dislocation following total hip replacement: causes and cures.

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Hip dislocation is a frequent cause of patient and surgeon dissatisfaction after hip replacement.
• Identifying causative factors is crucial for effective prevention strategies.

Purpose of the Study:

• To comprehensively review and understand the multifactorial causes of hip dislocation following hip replacement surgery.
• To provide insights for preventing dislocation through improved surgical techniques and patient management.

Main Methods:

• Literature review and analysis of patient, surgeon, and implant-related factors contributing to hip dislocation.
• Examination of biomechanical and technical aspects influencing joint stability post-arthroplasty.

Main Results:

• Patient factors (age, comorbidities, gender, laxity, revision status, abductor issues, education) and surgeon factors (experience, approach, component positioning, impingement) are significant.
• Implant design (head-neck region, skirts) and positioning (offset, leg length, liner placement) play a critical role.
• Late dislocations can occur due to polyethylene wear, soft-tissue disruption, or infection.

Conclusions:

• Multifactorial understanding of hip dislocation is essential for effective prevention.
• Meticulous pre-operative planning, accurate component placement, and robust patient education are vital for minimizing dislocation incidence.