How plate positioning impacts the biomechanics of the open wedge tibial osteotomy; a finite element analysisReportar como inadecuado




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Published in: Comput Methods Biomech Biomed Engin, vol. 8, num. 5, p. 307-13 Publication date: 2005

A numerical model of the medial open wedge tibial osteotomy based on the finite element method was developed. Two plate positions were tested numerically. In a configuration, (a), the plate was fixed in a medial position and (b) in an anteromedial position. The simulation took into account soft tissues preload, muscular tonus and maximal gait load.The maximal stresses observed in the four structural elements (bone, plate, wedge, screws) of an osteotomy with plate in medial position were substantially higher (1.13-2.8 times more) than those observed in osteotomy with an anteromedial plate configuration. An important increase (1.71 times more) of the relative micromotions between the wedge and the bone was also observed. In order to avoid formation of fibrous tissue at the bone wedge interface, the osteotomy should be loaded under 18.8% (approximately 50 kg) of the normal gait load until the osteotomy interfaces union is achieved.

Keywords: Osteotomy ; Biomechanics ; Finite element analysis ; Bone tissue engineering ; Plate position Note: EPFL, Laboratory for Orthopedic Research, Lausanne, Switzerland. 1025-5842 (Print) Journal Article Reference LBO-ARTICLE-2005-001doi:10.1080/10255840500322433





Autor: Blecha, L. D.; Zambelli, P. Y.; Ramaniraka, N. A.; Bourban, P. E.; Manson, J. A.; Pioletti, Dominique P.

Fuente: https://infoscience.epfl.ch/record/88227?ln=en







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