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Ceramic-on-ceramic total hip arthroplasty early dislocation rate.

Clifford W Colwell¹, William J Hozack, J Wesley Mesko

¹Shiley Center for Orthopaedic Research & Education at Scripps Clinic, La Jolla, CA 92037, USA. colwell@scripps.edu

Clinical Orthopaedics and Related Research

|August 2, 2007

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Modern ceramic-on-ceramic total hip arthroplasty shows a low early dislocation rate of 1.1% in a 9-year study. This finding supports ceramic bearings as a viable alternative for hip implants, potentially benefiting younger patients.

Area of Science:

Orthopedic Surgery
Biomaterials Science
Implant Wear Analysis

Background:

Conventional total hip arthroplasty (THA) using metal-on-polyethylene bearings faces longevity limitations due to wear debris.
Modern ceramic materials offer enhanced wear resistance and reduced fracture risk, making them promising for extending THA lifespan.
Potential concerns with ceramic bearings include fracture, squeaking, and increased dislocation rates due to design constraints.

Purpose of the Study:

To evaluate the early dislocation rate associated with modern ceramic-on-ceramic total hip arthroplasty.
To assess the safety and efficacy of ceramic bearings in a large patient cohort.

Main Methods:

Retrospective analysis of 1635 ceramic-on-ceramic THA procedures performed between 1996 and 2005.

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Documentation of all dislocation events, including type, treatment, and outcomes.

Main Results:

A total of 18 dislocations (1.1%) were observed: 3 anterior and 15 posterior.
All dislocations were successfully managed, with 1 revision surgery and 17 closed reductions under general anesthesia.

Conclusions:

Ceramic-on-ceramic THA demonstrates a low early dislocation rate, comparable to established bearing surfaces.
This bearing surface is a safe and effective alternative for total hip replacement, particularly for younger, active individuals.
The findings support the use of modern ceramic bearings in THA to improve long-term implant survival.