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Pitfalls during biomechanical testing — Evaluation of different fixation methods for measuring tendons endurance properties

Hangody, Gy and Pánics, G and Szebényi, G and Kiss, R and Hangody, L and Pap, K (2016) Pitfalls during biomechanical testing — Evaluation of different fixation methods for measuring tendons endurance properties. Physiology International, 103 (1). pp. 86-93. ISSN 2498-602X

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Abstract

The goal of the study was to find a proper technique to fix tendon grafts into an INSTRON loading machine. From 8 human cadavers, 40 grafts were collected. We removed the bone-patella tendon-bone grafts, the semitendinosus and gracilis tendons, the quadriceps tendon-bone grafts, the Achilles tendons, and the peroneus longus tendons from each lower extremity. We tested the tendon grafts with five different types of fixation devices: surgical thread (Premicron 3), general mounting clamp, wire mesh, cement fixation, and a modified clamp for an INSTRON loading machine. The mean failure load in case of surgical thread fixation was (381N ± 26N). The results with the general clamp were (527N ± 45N). The wire meshes were more promising (750N ± 21N), but did not reach the outcomes we desired. Easy slippages of the ends of the tendons from the cement encasements were observed (253N ± 18N). We then began to use Shi’s clamp that could produce 977N ± 416N peak force. We combined Shi’s clamp with freezing of the graft and the rupture of the tendon itself demonstrated an average force of 2198 N ± 773N. We determined that our modified frozen clamp fixed the specimens against high tensile forces.

Item Type: Article
Subjects: R Medicine / orvostudomány > R1 Medicine (General) / orvostudomány általában
Depositing User: Ágnes Sallai
Date Deposited: 08 Jun 2016 07:22
Last Modified: 31 Mar 2017 23:15
URI: http://real.mtak.hu/id/eprint/35672

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