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Journal of Long-Term Effects of Medical Implants
SJR: 0.145 SNIP: 0.491 CiteScore™: 0.89

ISSN Imprimir: 1050-6934
ISSN En Línea: 1940-4379

Journal of Long-Term Effects of Medical Implants

DOI: 10.1615/JLongTermEffMedImplants.2014011133
pages 185-188

Catastrophic Stem Taper Wear in Ceramic on Polyethylene Bearing Couple: A Case Report

Atsushi Kusaba
Institute for Joint Replacement and Rheumatology, Ebina General Hospital, Kanagawa, Japan
Mariko Katsui
Department of Orthopaedic Surgery, Showa University Fujigaoka Hospital, Yokohama, Japan
Naoyuki Hakuta
Department of Orthopaedic Surgery, Showa University Fujigaoka Hospital, Yokohama, Japan
Masashi Tsuchida
Department of Orthopaedic Surgery, Showa University Fujigaoka Hospital, Yokohama, Japan
Akihiko Maeda
Department of Orthopaedic Surgery, Showa University Fujigaoka Hospital, Yokohama, Japan
Saiji Kondo
Institute for Joint Replacement and Rheumatology, Ebina General Hospital, Kanagawa, Japan

SINOPSIS

A severe abrasion occurred at the stem taper 13 years after total hip arthroplasty. The bearing couple was 28 mm ceramic on polyethylene. The ceramic head had almost no damage, whereas the stem taper had severe damage. An ectopic bone probably contributed to the abrasion. The ectopic bone had grown to restrict the normal motion in the bearing couple and all stress and torque seemed to concentrate in the junction until the junction obtained mobility instead of the original bearing couple.


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