A visco-elastic model for the prediction of orthodontic tooth movement

An Van Schepdael, Kris De Bondt, Liesbet Geris and Jos Vander Sloten

Computer Methods in Biomechanics and Biomedical Engineering, 2014, vol. 17, issue 6, 581-590

Abstract: This study presents a biomechanical model of orthodontic tooth movement. Although such models have already been presented in the literature, most of them incorporate computationally expensive finite elements (FE) methods to determine the strain distribution in the periodontal ligament (PDL). In contrast, the biomechanical model presented in this work avoids the use of FE methods. The elastic deformation of the PDL is modelled using an analytical approach, which does not require setting up a 3D model of the tooth. The duration of the lag phase is estimated using the calculated hydrostatic stresses, and bone remodelling is predicted by modelling the alveolar bone as a viscous material. To evaluate the model, some typically used motion patterns were simulated and a sensitivity analysis was carried out on the parameters. Results show that despite some shortcomings, the model is able to describe commonly used motion patterns in orthodontic tooth movement, in both single- and multi-rooted teeth.

Date: 2014
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DOI: 10.1080/10255842.2012.703182

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