NDLI: A finite element analysis of bone plates available for prophylactic internal fixation of the radial osteocutaneous donor site using the sheep tibia model.

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A finite element analysis of bone plates available for prophylactic internal fixation of the radial osteocutaneous donor site using the sheep tibia model.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Avery, C. M. E. Bujtár, Péter Simonovics, János Dézsi, Tamás Váradi, Károly Sándor, George K. B. Pan, Jingzhe
Description	Country affiliation: United kingdom Author Affiliation: Avery CM ( University Hospitals of Leicester, Department of Maxillofacial Surgery, Leicester, United Kingdom. chrisavery@doctors.org.uk)
Abstract	INTRODUCTION: The strengthening effect of prophylactic internal fixation (PIF) with a bone plate at the radial osteocutaneous flap donor site has previously been demonstrated using the sheep tibia model of the human radius. This study investigated whether a finite element (FE) model could accurately represent this biomechanical model and whether stress or strain based failure criteria are most appropriate. METHODS: An FE model of an osteotomised sheep tibia bone was strengthened using 4 types of plates with unilocking or bicortical screw fixation. Torsion and 4-point bending simulations were performed. The maximum von Mises stresses and strain failure criteria were studied. RESULTS: The strengthening effects when applying stress failure criteria [factor 1.76-4.57 bending and 1.33-1.80 torsion] were comparable to the sheep biomechanical model [factor 1.73-2.43 bending and 1.54-2.63 torsion]. The strongest construct was the straight 3.5mm stainless steel unilocking plate. Applying strain criteria the strongest construct was the straight 3.5mm stainless DCP plate with bicortical screw fixation. CONCLUSIONS: The FE model was validated by comparison with the sheep tibia model. The complex biomechanics at the bone-screw interface require further investigation. This FE modelling technique may be applied to a model of the human radius and other sites.
File Format	HTM / HTML
ISSN	13504533
Issue Number	10
Volume Number	35
e-ISSN	18734030
Journal	Medical Engineering & Physics
Language	English
Publisher	Elsevier
Publisher Date	2013-10-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Biomedical Engineering Discipline Physics Discipline Biophysics Bone Plates Finite Element Analysis Fracture Fixation, Internal Instrumentation Radius Sheep Surgical Flaps Tibia Surgery Animals Compressive Strength Materials Testing Stress, Mechanical Injuries Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Biophysics Biomedical Engineering

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