[5 years' experiences with the Gersthof polyethylene peg-anchored acetabulum]

Area of Science:

• Orthopedic surgery
• Biomaterials science
• Medical device engineering

Context:

• The acetabular socket is a critical component in hip replacement surgery.
• Cement-free fixation methods are increasingly explored to improve implant longevity.
• The "Model Gersthof" socket utilizes a spherical polyethylene design with external pegs for cementless anchoring.

Purpose:

• To evaluate the radiological stability and survival rate of the cement-free "Model Gersthof" acetabular socket.
• To assess the incidence of aseptic loosening as a primary indicator of implant failure.
• To provide long-term performance data for a specific cementless acetabular component design.

Summary:

• A total of 1316 cement-free "Model Gersthof" acetabular sockets were implanted between July 1979 and October 1986.
• Radiological instability, defined as aseptic loosening, was the main criterion for evaluating socket performance.
• After a five-year follow-up period, the observed survival rate for this acetabular socket design was 92% ± 2.9%.

Impact:

• The findings contribute to understanding the long-term efficacy of cement-free acetabular components in hip arthroplasty.
• This data can inform orthopedic surgeons and implant manufacturers regarding the performance of the "Model Gersthof" socket.
• The study highlights the importance of radiological assessment in evaluating the success of cementless hip implants.