Ceramic-on-Polyethylene Bearing

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A recent report from the Department of Orthopedics and the Intensive Care Unit in Zhongnan Hospital of Wuhan University have found that ceramic-on-ceramic (COC) bearing surfaces in primary total hip arthroplasty (THA) increased the risk of total implant fracture significantly compared to ceramic-on-polyethylene (COP) bearing surfaces.

The purpose of this study was to evaluate the reliability and durability of COC vs COP bearing surfaces in THA. The researchers performed a meta-analysis comparing clinical and radiographic outcomes achieved by the two bearing surfaces. However, no significant differences were observed between bearing surfaces with regard to revision, osteolysis and radiolucent lines, loosening, dislocation or deep infection.

Patients who received COC bearing surfaces also demonstrated no increased risk for deep venous thrombosis, pulmonary embolus, heterotopic ossification, trochanteric bursitis or leg-length discrepancy compared with those who received COP bearing surfaces.

Total hip arthroplasty has become a common treatment for end-stage hip joint diseases. With advancing implant designs and surgical techniques used in THA, bearing surface wear and wear-induced osteolysis have become the major limitations for long-term prosthesis survivorship, especially in young, active patients.

For more information on this study, please visit the Orthopedics journal.

Correspondence should be addressed to: Liaobin Chen, MD, PhD, Department of Orthopedics, Zhongnan Hospital of Wuhan University, 169# Donghu Rd, Wuchang District, Wuhan, 430071, People’s Republic of China ( [email protected]).

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