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Primary hybrid THA using a polymethyl methacrylate‐precoated stem: A single‐center experience with a 10‐year minimum follow‐up
Author(s) -
Kim Wanlim,
Yoon Pil Whan,
Kwak Hong Suk,
Yoo Jeong Joon,
Kim Hee Joong,
Yoon Kang Sup
Publication year - 2017
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.33626
Subject(s) - polymethyl methacrylate , center (category theory) , medicine , materials science , composite material , chemistry , polymer , crystallography
The high failure rate of cemented femoral components in the 1970s facilitated the improvement of the cementing technique and surface finishes such as polymethylmethacrylate (PMMA)‐precoated stems, reporting a survival rate of >95% at 10 years from some studies. However, controversy persists regarding whether precoated femoral stems are associated with a longer revision‐free prosthesis survival. The purpose of this study was to evaluate the clinical and radiological outcomes of PMMA‐precoated femoral stems, and analyze factors associated with implant survival. We retrospectively reviewed 73 primary hybrid total hip arthroplasties performed using PMMA‐precoated femoral stems. The mean age of the patients was 61 years. During the mean follow‐up period of 13 years, 18 hips (24.7%) underwent aseptic loosening, and all of the loosened stems were subjected to revision surgery 8.8 years (range 4.6–15.5 years) from the index surgery. Younger age and poor cementing were significantly associated with aseptic loosening ( P = 0.013 and P < 0.001, respectively). However, the aseptic loosening rate was also high at 13.1% even with a good cementing technique. In conclusion, the PMMA‐precoated stem failed to show expected advantages and needs to be replaced with other surface finish stem designs. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1300–1306, 2017.