Dual mobility total hip replacement in a high risk population

Area of Science:

• Orthopedic surgery
• Biomedical engineering

Background:

• High-risk patients undergoing total hip replacement often require deep hip flexion during activities like sitting and praying.
• Dual mobility implants offer a wider range of motion and may reduce dislocation risk in these patients.

Purpose of the Study:

• To evaluate the outcomes of dual mobility total hip replacement in a high-risk population.
• To assess the efficacy of the dual mobility cup system in preventing dislocation during extreme hip flexion.

Main Methods:

• A total of 65 patients (35 primary, 30 complex total hip replacements) were included, utilizing the Avantage Privilege dual mobility cup system.
• Both cemented acetabular and bimetric femoral components were used, with fixation method determined by canal type.
• Ten cases underwent fluoroscopic examination for range of motion and impingement assessment.

Main Results:

• One case of dislocation occurred in the complex total hip replacement group, indicating a low prevalence.
• Fluoroscopic evaluation revealed no impingement between the prosthesis neck and acetabular shell at the extremes of motion.

Conclusions:

• Dual mobility total hip replacement demonstrates a low dislocation rate in high-risk patients, even with activities involving deep hip flexion.
• This implant system is considered a preferred option for patients undergoing complex total hip replacement procedures.