Citation

Gialain IO, Coto NP, Driemeier L, Noritomi PY, Dias RB. Dent. Traumatol. 2016; 32(5): 409-415.

Affiliation

Faculdade de Odontologia da Universidade de São Paulo, São Paulo, Brazil.

Copyright

(Copyright © 2016, John Wiley and Sons)

DOI

10.1111/edt.12265

PMID

26948056

Abstract

BACKGROUND/AIM: The aim of this study was to evaluate the compressive and tensile stresses on dentin and enamel in five different situations: no mouthguard and mouthguards from 1 mm thickness up to 4 mm thickness, using finite element analysis.

MATERIALS AND METHODS: A three-dimensional geometry of an upper right central incisor was obtained from a computed tomography and transformed into a mesh separating enamel from dentin. A mouthguard was created covering the buccal surface of the enamel in different thicknesses, and a rubber ball with a velocity of 5 m s(-1) was made as the impact object.

RESULTS: The maximum principal stress and the minimal principal stress were evaluated in all situations on dentin and enamel. Both maximum and minimal stress on enamel had the greatest value on the control situation (no mouthguard), and their value decreased as the mouthguard thickness increased. The reduction ranged from 66.62% to 85.5% for compressive stress and from 9.76% to 33.37% for tensile stress on enamel. The results for dentin were similar among the situations with or without mouthguards.

CONCLUSION: The mouthguard had beneficial effect considering the stresses on enamel, and between the mouthguard thickness of 3 and 4 mm, there was minimum difference.

© 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

Language: en