Finite element analysis of stress distribution in intact and porcelain veneer restored teeth

• Published in: Computer methods in biomechanics and biomedical engineering 2012-08, Vol.15 (8), p.795-800
• Main Authors: Matson, M. R., Lewgoy, H. R., Barros Filho, D. A., Amore, R., Anido-Anido, A., Alonso, R. C.B., Carrilho, M. R.O., Anauate-Netto, C.
• Format: Article
• Language: English
• Subjects: Bite Force; Computer Simulation; dental porcelain; Dental Porcelain - chemistry; Dental Stress Analysis - methods; Dental Veneers; Finite Element Analysis; Humans; Incisor - physiology; Incisor - surgery; mechanical stress; Models, Biological; Stress, Mechanical
• ISSN: 1025-5842; 1476-8259
• DOI: 10.1080/10255842.2011.561013

The aim of this study was to investigate the stress distribution generated in a veneer restoration of an upper central incisor compared to intact teeth using the finite element analysis after applying a lingual buccal loading at the incisal edge. Methods: Two models were developed: one model contained enamel, dentine, cementum, periodontal ligament, cortical and trabecullar bones, and the other model was a veneer restoration; both models were developed using MSC/Nastran software (MacNeal-Schwendler Corporation, Los Angeles, CA, USA) as the pre- and post-processor. A 10-N load was applied at the incisal edge from the lingual to the buccal side to simulate oral conditions in this area (protrusion). Results: Von Mises stresses were then analysed for three different regions: A-B (enamel elements under the veneer or second enamel layer), A′-B′ (buccal enamel and/or veneer element layer) and C-D (lingual enamel elements layer). A higher stress mode was observed for both models at the lingual cervical region. Conclusions: The presence of a veneer restoration on the incisors is a good alternative to mimic the behaviour of enamel under protrusion loading conditions. The use of veneers to replace enamel during rehabilitations is recommended.