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Medium to long-term results with the cementless threaded Acetabular Munich II type cup
C Pellengahr1, B Wegener, H Anetzberger
1Orthopädische Klinik und Poliklinik, Klinikum Grosshadern, Ludwig-Maximilians-Universität, München, Germany.
Acta Chirurgica Belgica
|October 8, 2004
Summary
The Aesculap Munich II threaded acetabular cup shows improved clinical and radiographic results compared to the type I cup in hip arthroplasty. This cementless threaded cup represents an advance in acetabular component development.
Area of Science:
- Orthopedic Surgery
- Biomaterials Engineering
Background:
- Limited data exists on the outcomes of screwed acetabular cups in hip arthroplasty compared to press-fit designs.
- Threaded acetabular cups offer an alternative fixation method in total hip replacement.
Purpose of the Study:
- To evaluate the clinical and radiographic outcomes of the cementless, threaded Aesculap Munich II acetabular cup.
- To compare the performance of the Aesculap Munich II cup with the smooth-surfaced Aesculap Munich I threaded cup.
Main Methods:
- Retrospective analysis of 51 primary total hip replacements using cementless Aesculap Munich II threaded cups.
- Comparison with 53 primary total hip replacements using Aesculap Munich I threaded cups.
- Clinical and radiographic assessment with a mean follow-up of 7.9 years for type II and 10.2 years for type I cups.
Main Results:
- The Aesculap Munich II cup demonstrated encouraging improvements in the Merle d'Aubigné Score compared to the type I cup.
- Two Aesculap Munich II cups required revision, and four showed radiographic signs of loosening.
- Intermediate results for the type II cup were favorable compared to smooth-surfaced screwed rings and comparable to cemented and press-fit cups.
Conclusions:
- The threaded Aesculap Munich II acetabular cup appears to be a significant advancement in threaded cup technology.
- Its intermediate outcomes suggest favorable performance in cementless total hip arthroplasty.