Comparison of Wear Rate between Ceramic on Ceramic, Metal on Highly Cross-Linked Polyethylene and Metal on Metal Bearings: A 5-10-Year Follow-Up Study

Yoshitoshi Higuchi, Taisuke Seki, Daigo Morita, Daigo Komatsu, Takehiro Kasai, Yasuhiko Takegami and Naoki Ishiguro

Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Japan

^*Correspondance to: Yoshitoshi Higuchi 

 PDF  Full Text DOI: 10.25107/2474-1647.1915

Abstract

Currently, there is a lack of evidence on the medium-term follow-up of cementless total hip arthroplasty (THA) using metal-on highly cross-linked polyethylene bearing (MoP), ceramic on ceramic bearing (CoC), and metal on metal (MoM) bearings at more than 5 years follow-up. Our aim was to calculate the 5 to 10-year wear rate and incidence rate of osteolysis for three types of THAs. Seventy-seven patients (68 women, 9 men) underwent MoP THAs, 105 (85 women, 20 men) underwent CoC THAs and 55 (11 women, 44 men) underwent MoM THAs. The average patient age at the time of surgery was 64.7, 55.9, and 59.9 years in the MoP, CoC, and MoM THA groups, respectively. Clinical and radiologic measurements at a mean follow-up of 7.6 years (range, 5 to 10 years) were analyzed. The mean postoperative Harris hip scores showed no difference among the groups. The mean annual liner wear rates were 0.0160, 0.0040 and 0.0054 mm/year in MoP, CoC and MoM THAs, with that of CoC THAs being significantly lower than the others. Osteolysis (14.5%) among MoM THAs was significantly more frequently observed compared with MoP and CoC THAs. Kaplan-Meier survival at 10 years with regard to implant loosening, or revision THA as the endpoint, was 96.1% (95% CI: 88.4 to 98.7) for MoP, 98.6% (95% CI: 90.3 to 98.6) for CoC, and 98.2% (95% CI: 88.0 to 99.7) for MoM (p=0.360). Excellent clinical and radiological outcomes were obtained for MoP and CoC of bearings.

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Cite the article

Higuchi Y, Seki T, Morita D, Komatsu D, Kasai T, Takegami Y, et al. Comparison of Wear Rate between Ceramic on Ceramic, Metal on Highly Cross-Linked Polyethylene and Metal on Metal Bearings: A 5-10-Year Follow-Up Study. Clin Surg. 2018; 3: 1915.