Wear testing of a canine hip resurfacing implant that uses highly cross-linked polyethylene.

Autor: Warburton KJ; Boise State University, 1910 University Drive, Boise, 83725-2085, Idaho., Everingham JB; Boise State University, 1910 University Drive, Boise, 83725-2085, Idaho., Helms JL; Boise State University, 1910 University Drive, Boise, 83725-2085, Idaho., Kazanovicz AJ; Securos Surgical, 443 Main Street, Fiskdale, 01518, Massachusetts., Hollar KA; Boise State University, 1910 University Drive, Boise, 83725-2085, Idaho., Brourman JD; WestVet Animal Emergency and Specialty Center, 5019 N. Sawyer Ave., Garden City, 83714, Idaho., Fox SM; Securos Surgical, 443 Main Street, Fiskdale, 01518, Massachusetts., Lujan TJ; Boise State University, 1910 University Drive, Boise, 83725-2085, Idaho.
Jazyk: angličtina
Zdroj: Journal of orthopaedic research : official publication of the Orthopaedic Research Society [J Orthop Res] 2018 Apr; Vol. 36 (4), pp. 1196-1205. Date of Electronic Publication: 2017 Nov 14.
DOI: 10.1002/jor.23745
Abstrakt: Hip resurfacing offers advantages for young, active patients afflicted with hip osteoarthritis and may also be a beneficial treatment for adult canines. Conventional hip resurfacing uses metal-on-metal bearings to preserve bone stock, but it may be feasible to use metal-on-polyethylene bearings to reduce metal wear debris while still preserving bone. This study characterized the short-term wear behavior of a novel hip resurfacing implant for canines that uses a 1.5 mm thick liner of highly cross-linked polyethylene in the acetabular component. This implant was tested in an orbital bearing machine that simulated canine gait for 1.1 million cycles. Wear of the liner was evaluated using gravimetric analysis and by measuring wear depth with an optical scanner. The liners had a steady-state mass wear rate of 0.99 ± 0.17 mg per million cycles and an average wear depth in the central liner region of 0.028 mm. No liners, shells, or femoral heads had any catastrophic failure due to yielding or fracture. These results suggest that the thin liners will not prematurely crack after implantation in canines. This is the first hip resurfacing device developed for canines, and this study is the first to characterize the in vitro wear of highly cross-linked polyethylene liners in a hip resurfacing implant. The canine implant developed in this study may be an attractive treatment option for canines afflicted with hip osteoarthritis, and since canines are the preferred animal model for human hip replacement, this implant can support the development of metal-on-polyethylene hip resurfacing technology for human patients. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:1196-1205, 2018.
(© 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc.)
Databáze: MEDLINE
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