02 Novembre 2018

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Strength distribution on TMJ using mandibular advancement device for OSAS treatment: a finite element study

Original article

Giorgia Crivellin, Giovanni Bruno, Alberto De Stefani, Alida Mazzoli, Marco Mandolini, Agnese Brunzini, Antonio Gracco

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Objective  The aim of this study is the evaluation of the temporomandibular joint stress distribution during the use of a Mandibular Advancement Device.
Materials and methods  This study is made using Finite Element Method (FEM). Dental casts, advancement bite, CBCT and MRI were taken in a 27-year-old woman. A Somnodent device was scanned and associated with a three-dimensional cranium.

FEM analysis was made using ANSYS software with 1 and 2 mm of advancement.
Results  The articular disc showed values range between 0.099-6.39 and 0.5-2.02 MPa for an advancement of 1 and 2 mm respectively. The condyle load distribution showed values range between 0.0037-7.50 and 0.0020-10.0 MPa for an advancement of 1 and 2 mm respectively.
Conclusions  Values obtained are significantly lower than limit values of the condyle and articular disc. Slight mandibular advancement can be consider a safe procedure even for the long period and should not cause permanent side effects.

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doi: https://doi.org/10.19256/d.cadmos.09.2018.04