Finite element analysis of three patterns of internal fixation of fractures of the mandibular condyle |
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Authors: | Peter Aquilina Uphar Chamoli William CH Parr Philip D Clausen Stephen Wroe |
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Institution: | 1. Department of Oral & Maxillofacial Surgery, Westmead Hospital, Sydney, Australia;2. Computational Biomechanics Research Group, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney 2052, Australia;3. School of Engineering, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia;4. St. George Clinical School, University of New South Wales, Sydney 2052, Australia;5. Department of Plastic, Reconstructive and Faciomaxillary Surgery, The Nepean Hospital, Sydney, Australia |
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Abstract: | The most stable pattern of internal fixation for fractures of the mandibular condyle is a matter for ongoing discussion. In this study we investigated the stability of three commonly used patterns of plate fixation, and constructed finite element models of a simulated mandibular condylar fracture. The completed models were heterogeneous in the distribution of bony material properties, contained about 1.2 million elements, and incorporated simulated jaw-adducting musculature. Models were run assuming linear elasticity and isotropic material properties for bone. This model was considerably larger and more complex than previous finite element models that have been used to analyse the biomechanical behaviour of differing plating techniques. The use of two parallel 2.0 titanium miniplates gave a more stable configuration with lower mean element stresses and displacements over the use of a single miniplate. In addition, a parallel orientation of two miniplates resulted in lower stresses and displacements than did the use of two miniplates in an offset pattern. The use of two parallel titanium plates resulted in a superior biomechanical result as defined by mean element stresses and relative movement between the fractured fragments in these finite element models. |
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Keywords: | FEA Condyle fractures Biomechanics |
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