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Weber rotation total hip replacement: a prospective 5- to 20-year followup study
P T de Jong1, H M van der Vis, F H R de Man
1Department of Orthopedic Surgery Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. ptdejong@tiscali.nl
Clinical Orthopaedics and Related Research
|March 17, 2004
Summary
This study evaluated the long-term outcomes of cemented total hip replacements using the Weber Rotation prosthesis. Results show good implant survival rates, with cementing technique and acetabular component design impacting loosening rates.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
- Medical Device Engineering
Background:
- The Weber Rotation prosthesis was utilized for primary total hip replacements between 1974 and 1989.
- A standardized operative technique was employed, with modifications to the stem introduced in 1978.
Purpose of the Study:
- To assess the long-term clinical and radiologic outcomes of cemented total hip replacements.
- To determine the survivorship of the Weber Rotation prosthesis, including its components (stem and socket).
- To identify factors influencing implant loosening and revision rates.
Main Methods:
- A cohort of 315 primary total hip replacements (274 patients) was followed retrospectively.
- Routine clinical and radiologic examinations were performed postoperatively.
- Survivorship analyses were conducted using revision for aseptic loosening and radiologic evidence of loosening as end points.
Main Results:
- Overall survivorship with revision for aseptic loosening was 93% at 10 years and 78% at 15 years.
- Component survival at 15 years: socket 89%, stem 81%.
- Radiographic loosening at 15 years: socket 85%, stem 72%.
- Improved socket survival (100% at 10 years, 98% at 13 years) observed with a modified cementing technique and hemispheric socket.
Conclusions:
- The cementing technique and acetabular component design are critical factors influencing aseptic loosening in cemented total hip arthroplasty.
- The Weber Rotation prosthesis demonstrated acceptable long-term survivorship, particularly with optimized cementing and socket design.