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Published on: September 7, 2022
Early dislocation rate in ceramic-on-ceramic total hip arthroplasty
Kenny Mai1, Mary E Hardwick, Richard H Walker
1Division of Orthopaedics, Scripps Clinic, 10666 North Torrey Pines Road, MS116, La Jolla, CA 92037, USA.
Summary
Modern ceramic-on-ceramic total hip arthroplasty (THA) shows low early dislocation rates. This advanced bearing surface offers potential for longer-lasting hip replacements, especially for active individuals.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
- Medical Engineering
Background:
- Metal-on-polyethylene bearings in total hip arthroplasty (THA) generate wear debris, potentially limiting implant longevity.
- Ceramic bearing surfaces offer superior wear resistance and low fracture risk, enhancing THA durability.
- Concerns exist regarding ceramic-on-ceramic THA, including potential for increased dislocation due to component limitations.
Purpose of the Study:
- To prospectively evaluate the early dislocation incidence of a specific ceramic-on-ceramic THA system.
- To assess the safety and efficacy of ceramic-on-ceramic bearings in a large patient cohort.
Main Methods:
- Prospective study of 336 consecutive ceramic-on-ceramic THA procedures performed between 1997 and 2005.
- Data collection focused on early postoperative dislocation events and component integrity.
- All dislocations were managed with closed reduction.
Main Results:
- A low early dislocation rate of 0.6% (2 out of 336 cases) was observed during the first postoperative year.
- No dislocations occurred after the first postoperative year.
- No component fractures or revisions were reported in the series.
Conclusions:
- Ceramic-on-ceramic THA demonstrates a low incidence of early dislocation.
- This bearing surface is a viable option for extending THA longevity, particularly for younger, active patients.
- The findings support the safety and effectiveness of ceramic-on-ceramic articulation in total hip replacement.