Open Access
CC BY-NC-ND 4.0 · Rev Bras Ortop (Sao Paulo) 2019; 54(03): 295-302
DOI: 10.1055/s-0039-1691762
Artigo Original | Original Article
Sociedade Brasileira de Ortopedia e Traumatologia. Published by Thieme Revnter Publicações Ltda Rio de Janeiro, Brazil

Comparison of Wear Rate between Ceramic-on-Ceramic, Metal on Highly Cross-linked Polyethylene, and Metal-on-Metal Bearings[]

Article in several languages: português | English
1   Departamento de Cirurgia Ortopédica, Nagoya University Graduate School of Medicine, Tsurumai-cho, Showa-ku, Nagoya, Japão
,
Taisuke Seki
1   Departamento de Cirurgia Ortopédica, Nagoya University Graduate School of Medicine, Tsurumai-cho, Showa-ku, Nagoya, Japão
,
Daigo Morita
1   Departamento de Cirurgia Ortopédica, Nagoya University Graduate School of Medicine, Tsurumai-cho, Showa-ku, Nagoya, Japão
,
Daigo Komatsu
1   Departamento de Cirurgia Ortopédica, Nagoya University Graduate School of Medicine, Tsurumai-cho, Showa-ku, Nagoya, Japão
,
Yasuhiko Takegami
1   Departamento de Cirurgia Ortopédica, Nagoya University Graduate School of Medicine, Tsurumai-cho, Showa-ku, Nagoya, Japão
,
Naoki Ishiguro
1   Departamento de Cirurgia Ortopédica, Nagoya University Graduate School of Medicine, Tsurumai-cho, Showa-ku, Nagoya, Japão
› Author Affiliations
Further Information

Publication History

19 January 2018

10 July 2018

Publication Date:
27 June 2019 (online)

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Abstract

Objective 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 (MoP), ceramic-on-ceramic (CoC), and metal-on-metal (MoM) bearings. Our aim was to calculate the 5- to 10-year wear rate and the incidence rate of osteolysis for 3 types of bearings.

Methods A total of 77 patients underwent MoP, 105 underwent ceramic CoC, and 55 underwent MoM THAs. The average patient age at the time of surgery was 64.7, 55.9, and 59.9 years old in the MoP, CoC, and MoM bearings, respectively. Clinical and radiologic measurements at a mean follow-up of 7.6 years were analyzed.

Results 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 bearings, and MoM bearings, with that of CoC bearings being significantly lower than the others. Osteolysis (14.5%) among MoM bearings was significantly more frequently observed compared with the others. Kaplan-Meier survival at 10 years with implant loosening, or revision THA as the endpoint, was 96.1% (95% confidence interval [CI]: 88.4–98.7) for MoP, 98.6% (95% CI: 90.3–98.6) for CoC bearing, and 98.2% (95% CI: 88.0–99.7) for MoM bearings (p = 0.360).

Conclusion Excellent clinical and radiological outcomes were obtained for MoP and CoC bearings.

The present study was conducted at the Department of Orthopedic Surgery of the Nagoya University Graduate School of Medicine, Tsurumai-cho, Showa-ku Nagoya, Japan.