Affiliations: Department of Stomatology, Charles University in Prague, Prague, Czech Republic | Department of Aircraft Strength, National Aerospace University, Kharkov, Ukraine | Faculty of Mathematics and Mechanical Engineering, Kharkov National University, Kharkov, Ukraine | Department of Material Science and Composite Materials, National Aerospace University, Kharkov, Ukraine
Note: [] Address for correspondence: Prof. Vladislav Demenko, PhD, Department of Aircraft Strength, National Aerospace University, KhAI 17, Chkalova str., Kharkov, 61070, Ukraine. Tel.: +380577074888; Fax: +380573151158; E-mail: vladislav.demenko@gmail.com.
Abstract: Mechanical strength of worn hard dental tissues of a tooth crown under its local loading by a hard food particle was evaluated. A mathematical model of a tooth crown was developed as a two-layer elastic solid, which consisted of worn or demineralized worn enamel, and dentine loaded by masticatory forces through a hard food particle in direct contact. A geometrical model of the crown allowed simulation of several stages of enamel wear, resulting in the redistribution of stresses inside the crown tissues. Using finite element method, components of stress state and von Mises equivalent stress along the depth of multi-layer elastic solid were calculated. This methodology allows calculation of limiting values of worn enamel thickness from the viewpoint of dentine overstress prevention.
