A mathematical analysis of shrinkage stress development in dental composite restorations during resin polymerization

Dental Materials : Official Publication of the Academy of Dental Materials
Jianying LiSiu Lun Fok

Abstract

To derive an analytical solution of shrinkage stresses in a simplified Class-I composite restoration using a visco-elastic material model. Simplified, multi-layer, circular plane models were used to represent different sections of a tooth with a Class-I restoration: one section is close to the top occlusal surface and the other is at a deeper location of the restoration. The sections are therefore subjected to different stress states, i.e., plane-stress and plane-strain, respectively. The analytical solution obtained was compared with the numerical results from finite element analysis. A sensitivity study was then carried out to examine the relative influence of geometric and material parameters on the shrinkage stress development. The analytical solution for the shrinkage stress agrees reasonably well with the numerical results given by finite element analysis of more realistic geometries. The result shows that the residual stresses deep inside the restoration are much higher than those at the occlusal surface. This is because material at the former location is subjected to a stress state similar to that of equi-triaxial tension, which limits stress relaxation through viscous flow. However, a stress concentration exists at the...Continue Reading

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Citations

Sep 14, 2013·Dental Materials : Official Publication of the Academy of Dental Materials·Alex S L Fok
Dec 4, 2010·Journal of the Formosan Medical Association = Taiwan Yi Zhi·Zhengmei LinJingwei He
Jun 22, 2014·Dental Materials : Official Publication of the Academy of Dental Materials·Flávia P RodriguesRafael Y Ballester
Oct 16, 2010·Journal of Dental Biomechanics·Luis Felipe J SchneiderNick Silikas
Jun 26, 2012·Dental Materials : Official Publication of the Academy of Dental Materials·Jianying LiDavid C Watts
Mar 30, 2012·Dental Materials : Official Publication of the Academy of Dental Materials·Flávia GonçalvesRoberto R Braga
Jul 15, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·Haiyan LiAlex Siu-Lun Fok
Apr 12, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·Nadia EreifejDavid C Watts
Mar 5, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·Flávia GonçalvesRoberto R Braga
Jul 14, 2010·Dental Materials : Official Publication of the Academy of Dental Materials·Li FengAdrian C Shortall
Feb 23, 2010·Dental Materials : Official Publication of the Academy of Dental Materials·Xiaorong WuXueyu Song
May 11, 2015·Dental Materials : Official Publication of the Academy of Dental Materials·Yuping LiAlex Fok
Dec 1, 2009·Journal of Dentistry·Richard P RusinDavid H Pashley
Aug 22, 2016·Journal of the Mechanical Behavior of Biomedical Materials·Maryam KhoroushiPouran Samimi
Nov 26, 2010·Journal of Dental Research·J B C MeiraA Versluis
Feb 23, 2021·Dental Materials : Official Publication of the Academy of Dental Materials·Wondwosen A Aregawi, Alex S L Fok

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