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[Total hip prosthesis with metal-on-metal slide matching--current developments based on long-term observations]
1Klinik am Rosenberg, St. Gallen/Heiden.
Therapeutische Umschau. Revue Therapeutique
|July 1, 1995
Summary
Early metal-on-metal hip implants had issues but improved designs show reduced wear compared to polyethylene, offering a viable alternative. These advanced metal-on-metal hip prostheses demonstrate promising long-term performance and durability.
Area of Science:
- Biomaterials Science
- Orthopedic Surgery
- Mechanical Engineering
Context:
- Early metal-on-metal (MoM) artificial hip joints faced challenges leading to their replacement by polyethylene acetabular cups.
- Long-term follow-up revealed that some initial MoM hip implants performed exceptionally well, defying initial concerns.
Purpose:
- To investigate the reasons behind the successful long-term performance of early MoM hip implants.
- To re-evaluate the potential of MoM hip joint technology with advancements in design and manufacturing.
Summary:
- Improved machining and precise fitting of MoM hip implants address earlier shortcomings.
- Advanced MoM designs exhibit significantly lower wear rates compared to polyethylene counterparts.
- The author has developed and successfully implanted novel MoM prostheses.
Impact:
- Reintroduction of MoM hip implants as a potentially superior option for artificial hip joints.
- Potential for enhanced longevity and reduced revision rates in hip replacement surgery.
- Highlights the importance of manufacturing precision and fit in implant performance.