Related Experiment Video
Updated: Jun 13, 2026
09:08
Biotribological Testing and Analysis of Articular Cartilage Sliding against Metal for Implants
Published on: May 14, 2020
[Ten years experience with the cementless alloclassic cup according to zweymüller.]
1Orthopädische Schwerpunktabteilung, A. ö. Krankenhaus Zwettl, Osterreich.
Summary
This study on cementless hip replacements found the Zweymüller cup offers excellent long-term results with 90% good outcomes. Low polyethylene wear and good bone integration were key advantages.
Area of Science:
- Orthopaedic Surgery
- Biomaterials Science
Context:
- Cementless hip replacement has been performed for over 15 years.
- A retrospective analysis of 206 primary cement-free total hip endoprostheses implanted between 1987 and 1989 was conducted.
Purpose:
- To critically analyze the long-term clinical and radiological outcomes of cementless total hip endoprostheses.
- To evaluate the efficacy and complications associated with the cementless Alloclassic cup by Zweymüller.
Summary:
- 133 hips (64.6%) were evaluated after an average of 10.7 years post-surgery.
- 90% of cases showed very good to good clinical results (Merle d'Aubigne score).
- Average polyethylene wear was 1 mm, with 3% cup complications and 6.7% reoperations.
Impact:
- The cementless Alloclassic cup demonstrates ideal primary stability, simple surgical technique, optimal bony incorporation, and low polyethylene wear.
- Recommendations include changing the head size to 28 mm and considering metal-metal or ceramic-ceramic pairings for young, active patients.
