Journal Article

The mechanical behaviour of human mandibles studied by electronic speckle pattern interferometry

JF Román, P Fernández, V Moreno, M Abeleira, M Gallas and D Suárez

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 21, issue 4, pages 413-421
Published in print August 1999 | ISSN: 0141-5387
Published online August 1999 | e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/21.4.413
The mechanical behaviour of human mandibles studied by electronic speckle pattern interferometry

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An understanding of the mechanical behaviour of the human mandible during mastication may be useful in several specific medical fields that examine the maxillofacial area. In this research, the Electronic Speckle Pattern Interferometry Optical Technique was applied to study a dry mandible under external stress. Two images of the mandible, i.e. an image of the relaxed mandible and another of the mandible under stress, were processed using this technique and provided information concerning the most stressed areas of the bone. The advantage of interferometric analysis is that it can be carried out in real time on a mandible to which progressively greater stress has been applied. This research may be of value in maxillofacial surgery, for example, in the diagnosis and treatment of fractured mandibles, and in oral surgery and orthodontics, where it can provide information concerning stress dispersion when an osteointegrated implant or orthodontic appliance is placed in the mouth. One of the most important conclusions to be drawn from the experiments of tension, compression, and in- and out-of-plane deformations is that the capability of the mandible to bend is superior to its capability to stretch. Several quantitative results support this conclusion.

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Subjects: Restorative Dentistry and Orthodontics

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