Influence of the occlusal contacts in formation of Abfraction Lesions in the upper premolar

Victória Luswarghi Souza Costa, João Paulo Mendes Tribst*, Alexandre Luiz Souto Borges

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Objective: The aim of this study was to observe the influence of different occlusal contacts in a superior pre-molar structure using Finite Element Analysis. Material and Methods: A three-dimensional model of a superior pre-molar was designed to simulate three occlusion situations, namely central occlusion and two types of lateral occlusion contacts. The model presents enamel, dentin, a periodontal ligament and a fixation cylinder separately. All materials were considered isotropic, linear and homogeneous, and the contacts of each structure were perfectly bonded. On analysis software, a load was applied to an occlusal surface at 40° to the long axis on lateral contacts, and directed to the long axis on central occlusion contact. Results: The results were obtained in stress maps and the maximum values were then plotted in table for quantitative comparison, with the enamel concentrating more stress than dentin and the occlusal contact presenting the worst biomechanical behavior. Conclusion: Within the limitations of this study, it is possible conclude that: eccentric contacts have higher potential to develop abfraction lesions on the cervical region of teeth, thus increasing the magnitude of tensile and shear stresses.

Original languageEnglish
Pages (from-to)115-123
Number of pages9
JournalBrazilian Dental Science
Volume20
Issue number4
DOIs
Publication statusPublished - 2017

Bibliographical note

Funding Information:
The authors would like to thank the Foundation for Research Support of the State of São Paulo (FAPESP) for the scholarship, through the process number 2016/20021-0.

Funding Information:
The authors would like to thank the Foundation for Research Support of the State of S?o Paulo (FAPESP) for the scholarship, through the process number 2016/20021-0.

Publisher Copyright:
© 2017, Universidade Estadual Paulista, Institute of Science and Technology of Sao Jose dos Campos. All rights reserved.

Funding

The authors would like to thank the Foundation for Research Support of the State of São Paulo (FAPESP) for the scholarship, through the process number 2016/20021-0. The authors would like to thank the Foundation for Research Support of the State of S?o Paulo (FAPESP) for the scholarship, through the process number 2016/20021-0.

FundersFunder number
Foundation for Research Support of the State of S?o Paulo
Fundação de Amparo à Pesquisa do Estado de São Paulo2016/20021-0

    Keywords

    • Finite Elements Analysis, Abfraction
    • Occlusion, premolar
    • Stress distribution

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