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Case Reports in Orthopedics
Volume 2017 (2017), Article ID 2576196, 4 pages
Case Report

Natural Remission of Major Periprosthetic Osteolysis following Total Hip Arthroplasty with Metal-on-Metal Bearings

Joint Reconstruction Center, Funabashi Orthopedic Hospital, Funabashi, Japan

Correspondence should be addressed to Tatsuya Tamaki

Received 16 May 2017; Accepted 5 September 2017; Published 4 October 2017

Academic Editor: Paul E. Di Cesare

Copyright © 2017 Tatsuya Tamaki and Kazuhiro Oinuma. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The natural course of adverse events following the use of metal-on-metal (MoM) bearings in total hip arthroplasty (THA) is not well known. In this article, we report the case of a patient with asymptomatic major acetabular osteolysis following MoM THA that diminished gradually without any surgical intervention. A 58-year-old male underwent one-stage bilateral MoM THA for bilateral osteoarthritis. Four years after THA, major acetabular osteolysis developed in his right hip without any local or systemic symptoms. The patient underwent a careful radiographic and clinical observation without any surgical intervention because he did not want to undergo revision surgery. The lesion gradually diminished after 7 years, and most of the osteolytic area was replaced by newly formed bone at 10 years. He continues to be followed with no evidence of cup loosening or migration. Our observation suggests that a periprosthetic osteolytic change related to the use of MoM bearings has the potential for natural remission.