Shrinkage Stress Analysis of the Restored-Tooth Structure by the Finite Element Method
The purpose of this paper is to investigate the influence of interphase properties on restored-tooth structure due to polymerization shrinkage of resin-based composite. The stress within the restored tooth structure built up from the polymerization shrinkage of the restorative composite was computed accounting for the time-dependent and viscoelastic behavior of the composite. A sensitivity study was performed to examine the relative influence of geometric and material parameters of an interphase on the shrinkage stress development. It was found that a correlation exists between material and geometry properties at the restoration-tooth interface and higher shrinkage stresses were located at the interphase due to polymerization shrinkage. The varying material and geometry properties of restoration-tooth interface seemed to have a conclusive effect on the interfacial stress system, as well as on the longevity of the restoration.
Sihai Jiao, Zhengyi Jiang and Jinglong Bu
G. P. Chen et al., "Shrinkage Stress Analysis of the Restored-Tooth Structure by the Finite Element Method", Advanced Materials Research, Vols. 146-147, pp. 1792-1796, 2011