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CC BY-NC-ND 4.0 · Rev Bras Ortop (Sao Paulo) 2021; 56(01): 042-046
DOI: 10.1055/s-0040-1712491
Artigo Original
Joelho

Evaluation of Polyethylene Wear in a Brazilian Ultracongruent Knee Prosthesis with a Rotating Platform[*]

Article in several languages: português | English
José Ricardo Pécora 
1   Grupo do Joelho, Departamento de Ortopedia e Traumatologia, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo (HCFMUSP), São Paulo, SP, Brasil
,
Valéria Romero 
2   Faculdade de Medicina, Universidade de Campinas, Campinas, SP, Brasil
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Abstract

Objective To evaluate the wear of polyethylene in a Brazilian ultracongruent knee prosthesis with a rotating platform (Rotaflex, Víncula, Rio Claro, SP, Brasil).

Methods We used the test method with the loading and preparation parameters mentioned in the standards regulation ISO 14243-1:2009, and the measurement methods mentioned in the standards regulation ISO 14243-2:2009, for the evaluation of the wear behavior of a Brazilian prosthesis with a rotating platform. The equipment used for the wear test was the ISO 14243–1 gait simulator (EndoLab, Riedering, Germany).

Results After 10 million cycles, the evaluation of the polyethylene wear showed a regular appearance of surface wear at a mean rate of 2.56 mg per million cycles.

Conclusion The wear of the polyethylene of the evaluated prosthesis was minimal after the tests performed and with safety limits higher than those recommended by biomechanical engineering.

Keywords

arthroplasty, replacement, knee - knee prosthesis - prosthesis design - prosthesis failure

* Work developed at the Knee Group, Department of Orthopedics and Traumatology, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo (HCFMUSP), São Paulo, SP, Brazil, and at Faculdade de Medicina, Universidade de Campinas, Campinas, SP, Brazil.




Publication History

Received: 04 February 2020

Accepted: 02 March 2020

Article published online:
10 June 2020

© 2020. Sociedade Brasileira de Ortopedia e Traumatologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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