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DOI: 10.1055/s-0044-1788290
Avaliação do comportamento mecânico dos tendões patelar e semitendinoso utilizando a elastografia por ondas de cisalhamento (SSI) e testes de tração
Article in several languages: português | English Suporte Financeiro Os autores declaram que não receberam suporte financeiro de agências dos setores públicos, privados, ou sem fins lucrativos para a realização deste estudo.
Resumo
Objetivo Analisar as propriedades mecânicas dos tendões patelar (TP) e semitendinoso (ST) obtidos de cadáveres humanos congelados enquanto ainda frescos, provenientes de banco de tecidos, utilizando elastografia por ondas de cisalhamento (supersonic shearwave imaging, SSI, em inglês) e testes de tração.
Métodos Sete amostras de TP e cinco de ST foram testadas em máquina de tração e simultaneamente avaliadas por SSI. As medidas geradas possibilitaram comparar o comportamento mecânico dos tendões por curva stress x strain e módulo de cisalhamento (μ) em repouso. Também foi analisada a relação stress x μ sob tensão, e testada a relação entre esses parâmetros. Os resultados foram submetidos a análise estatística pelos testes t não-pareado com correção de Welch, correlação de Pearson e regressão linear para estimativa do módulo de Young (E).
Resultados O μ dos TP e ST em repouso foi, respectivamente, de 58,86 ± 5,226 kPa e 124,3 ± 7,231 kPa, com diferença estatisticamente significativa. O coeficiente de correlação entre stress e μ dos TP e ST foi classificado como muito forte. O E calculado dos TP e ST foi, respectivamente, de 19,97 kPa e 124,8 kPa, com diferença estatisticamente significativa.
Conclusão O ST foi mais rígido do que o TP nos testes de tração e nas avaliações por SSI. O μ esteve diretamente relacionado com o stress a que o tendão é submetido.
Relevância clínica Avaliar as propriedades mecânicas dos tendões mais utilizados como enxerto nas cirurgias de reconstrução ligamentar do joelho.
Trabalho desenvolvido no Serviço de Traumato-Ortopedia do Hospital Universitário Clementino Fraga Filho da Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil.
Publication History
Received: 20 November 2023
Accepted: 18 March 2024
Article published online:
04 September 2024
© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution 4.0 International License, permitting copying and reproduction so long as the original work is given appropriate credit (https://creativecommons.org/licenses/by/4.0/)
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