In vitro cyclic testing of the Exeter stem after cement within cement revision.
Cement-within-cement (C-C) revision arthroplasty minimizes the complications associated with removal of secure polymethylmethacrylate. Failure at the interfacial region between new and old cement mantles remains a theoretical concern. This article assesses the cyclic fatigue properties of bilaminar cement mantles after C-C revision in vitro with the Exeter stem. Seven Exeter stems were cemented into Sawbone femurs and removed, and new undersized stems were cemented into the preserved mantle. The new constructs were loaded for 1,000,000 cycles at body temperature. Cement mantles were inspected postcycling. In no case was there delamination or failure of the cement mantle. The findings support the hypothesis that use of a thin revision cement mantle in conjunction with a polished double-tapered stem is not detrimental to the overall success of the implant. In the presence of a secure cement-bone interface in suitable patients, we recommend C-C revision techniques using double-tapered polished femoral stems.
Queensland University of Technology, School of Engineering Systems and Institute of Health and Biomedical Innovation, Brisbane, Australia.
Lance Jon
LJ
Wilson
Cameron Gordon Roodveldt
CG
Bell
Patrick
P
Weinrauch
Ross
R
Crawford
D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001696:Biomechanical Phenomena; D001843:Bone Cements; D002484:Cementation / Q000379:methods*; D006622:Hip Prosthesis; D008422:Materials Testing; D011474:Prosthesis Design; D012086:Reoperation
D001843:Bone Cements