Surface texture analysis of different focal knee resurfacing implants after 6 and 12 months in vivo in a goat model.

Autor:	Aşık EE; Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands., Damen AHA; Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands., van Hugten PPW; Department of Orthopaedic Surgery, Maastricht University Medical Center, Maastricht, The Netherlands., Roth AK; Department of Orthopaedic Surgery, Maastricht University Medical Center, Maastricht, The Netherlands., Thies JC; DSM Biomedical BV, Geleen, The Netherlands., Emans PJ; Department of Orthopaedic Surgery, Maastricht University Medical Center, Maastricht, The Netherlands., Ito K; Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands., van Donkelaar CC; Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands., Pastrama M; Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands.
Jazyk:	angličtina
Zdroj:	Journal of orthopaedic research : official publication of the Orthopaedic Research Society [J Orthop Res] 2022 Oct; Vol. 40 (10), pp. 2402-2413. Date of Electronic Publication: 2022 Feb 06.
DOI:	10.1002/jor.25274
Abstrakt:	The clinical success of osteochondral implants depends significantly on their surface properties. In vivo, an implant may roughen over time which can decrease its performance. The present study investigates whether changes in the surface texture of metal and two types of polycarbonate urethane (PCU) focal knee resurfacing implants (FKRIs) occurred after 6 and 12 months of in vivo articulation with native goat cartilage. PCU implants which differed in stem stiffness were compared to investigate whether the stem fixating the implant in the bone influences surface topography. Using optical profilometry, 19 surface texture parameters were evaluated, including spatial distribution and functional parameters obtained from the material ratio curve. For metal implants, wear during in vivo articulation occurred mainly via material removal, as shown by the significant decrease of the core-valley transition from 91.5% in unused implants to 90% and 89.6% after 6 and 12 months, respectively. Conversely, for PCU implants, the wear mechanism consisted in either filling of the valleys or flattening of the surface by dulling of sharp peaks. This was illustrated in the change in roughness skewness from negative to positive values over 12 months of in vivo articulation. Implants with a softer stem experienced the most deformation, shown by the largest change in material ratio curve parameters. We therefore showed, using a detailed surface profilometry analysis, that the surface texture of metal and two different PCU FKRIs changes in a different way after articulation against cartilage, revealing distinct wear mechanisms of different implant materials. (© 2022 The Authors. Journal of Orthopaedic Research ® published by Wiley Periodicals LLC on behalf of Orthopaedic Research Society.)
Databáze:	MEDLINE
Externí odkaz:	Plný text