polietileno tibial móvel na artroplastia total do joelho mobile polyethylene bearing in total knee replacement
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2009
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Abstract
O desgaste do polietileno tibial utilizado nas artroplastias de joelho origina partículas que, quando fagocitadas, dão início à cascata de eventos biológicos que levam à osteólise e consequente afrouxamento dos componentes da prótese. Assim sendo, alternativas para o polietileno têm sido pesquisadas com o objetivo de minimizar o desgaste e, com isso, aumentar a durabilidade das artroplastias. Uma dessas opções é a utilização de polietilenos tibiais móveis, que apresentam maior conformidade do que os polietilenos fixos, ao mesmo tempo em que permitem autoalinhamento rotacional entre os componentes, melhorando, dessa forma, a cinética e a cinemática da prótese. São apresentados aqui, de forma resumida, porém abrangente, o conceito, os fundamentos biomecânicos, as indicações, os resultados esperados e complicações dos polietilenos tibiais móveis nas artroplastias totais do joelho.
Debris of polyethylene tibial bearings have been recognized as a major cause for the onset of the cascade of biological events leading to osteolysis and loosening of prosthetic components after total knee arthroplasty. Since then, research has been focused on alternative bearing surfaces in order to minimize the amount and rate of polyethylene wear off and, in doing so, increasing the survivorship rate for knee arthroplasties. One such option is to have a mobile tibial bearing allowing more conformity and rotational self-alignment of the components, improving kinetics and kinematics of the prosthesis. The authors present a resumed but throughout and comprehensive review of the rationale, biomechanics fundamentals, indications, pitfalls, outcomes and complications for the use of mobile tibial bearings in total knee replacement.
Debris of polyethylene tibial bearings have been recognized as a major cause for the onset of the cascade of biological events leading to osteolysis and loosening of prosthetic components after total knee arthroplasty. Since then, research has been focused on alternative bearing surfaces in order to minimize the amount and rate of polyethylene wear off and, in doing so, increasing the survivorship rate for knee arthroplasties. One such option is to have a mobile tibial bearing allowing more conformity and rotational self-alignment of the components, improving kinetics and kinematics of the prosthesis. The authors present a resumed but throughout and comprehensive review of the rationale, biomechanics fundamentals, indications, pitfalls, outcomes and complications for the use of mobile tibial bearings in total knee replacement.
| Reference Key |
cobra2009revistapolietileno
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|---|---|
| Authors | ;Hugo Alexandre de Araújo Barros Cobra;Idemar Monteiro da Palma |
| Journal | scientific american |
| Year | 2009 |
| DOI |
10.1590/S0102-36162009000600003
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| URL | |
| Keywords |
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