Biomecánica del fémur y húmero del zorro cangrejero (Cerdocyon thous, Linnaeus 1776) en ensayos de flexión de tres puntos y compresión axial

Autores/as

DOI:

https://doi.org/10.33448/rsd-v11i5.28144

Palabras clave:

Biología ósea; Mecánica de fractura; Ortopedia; Microscopía electrónica de barrido.

Resumen

El presente estudio se realizó con el objetivo de evaluar el comportamiento mecánico del fémur y húmero de Cerdocyon thous mediante ensayos de flexión en tres puntos y compresión axial. Para ello se utilizaron 13 fémures y 15 húmeros en la prueba de flexión, y 14 fémures y 15 húmeros en la prueba de compresión; una vez finalizadas las pruebas, se recogieron fragmentos óseos para su evaluación mediante microscopía óptica convencional y de luz polarizada, y microscopía electrónica de barrido. Se observó que el húmero es más resistente en relación al fémur en ambas pruebas, y que la longitud y el peso del hueso, además del ancho de la diáfisis, influyen en el comportamiento mecánico. La evaluación microscópica mostró que, en la superficie craneal de los huesos fracturados bajo flexión, la fractura fue causada por el mecanismo de desviación, mientras que la superficie caudal se rompió por delaminación. En huesos sometidos a compresión axial, las fracturas diafisarias ocurrieron por deflexión, mientras que las fracturas fisarias fueron causadas por varios mecanismos. No hubo correlación significativa entre la disposición de las fibras de colágeno o el contenido de minerales sobre las propiedades mecánicas obtenidas en ambos ensayos. Se puede concluir que existen diferencias significativas en el comportamiento mecánico del fémur y húmero de C. thous, donde el húmero es más resistente que el fémur tanto en cargas de flexión como de compresión. Dichos datos nos permiten predecir el comportamiento mecánico óseo de C. thous ante traumatismos por impactos de flexión y compresión, como los resultantes del pisoteo.

Citas

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09/04/2022

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PASTOR, F. M.; RESENDE, G. de O.; ALVES, R. C.; NUNES, L. de C.; FRANCO, G. G. .; BOELONI, J. N.; SERAKIDES, R.; SILVA, M. A. da . Biomecánica del fémur y húmero del zorro cangrejero (Cerdocyon thous, Linnaeus 1776) en ensayos de flexión de tres puntos y compresión axial. Research, Society and Development, [S. l.], v. 11, n. 5, p. e34511528144, 2022. DOI: 10.33448/rsd-v11i5.28144. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/28144. Acesso em: 20 jul. 2024.

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Ciencias Agrarias y Biológicas