Cemented calcar replacement femoral component in revision hybrid total hip arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomaterials Engineering

Background:

• Revision total hip arthroplasty (rTHA) presents complex challenges, especially concerning femoral component fixation.
• Cemented femoral components are utilized in hybrid rTHA, but their long-term durability requires evaluation.

Purpose of the Study:

• To assess the intermediate- to long-term survival and identify failure predictors of cemented calcar replacement femoral components in hybrid rTHA.

Main Methods:

• A retrospective study of 52 hips in 50 patients undergoing hybrid rTHA with cemented calcar replacement femoral components.
• Follow-up averaged 11.4 years, with Kaplan-Meier survival analysis used to determine outcomes.
• Statistical analysis identified factors associated with component failure.

Main Results:

• Six components (12%) required revision due to aseptic loosening, periprosthetic fracture, or deep infection.
• One additional component was found to be loose.
• Previous revision history, poorer preoperative femoral bone stock, and poor postoperative cement mantle grading were significant predictors of failure (P < .005).

Conclusions:

• Cemented calcar replacement femoral components demonstrate a 15-year survival rate of 90% for mechanical failure in hybrid rTHA.
• This fixation method is a reasonable choice for initial revision procedures, particularly in older, less active patient populations.