System compliance dictates the effect of composite filler content on polymerization shrinkage stress.

ABSTRACT:

Objective

The effect of filler content in dental restorative composites on the polymerization shrinkage stress (PS) is not straightforward and has caused much debate in the literature. Our objective in this study was to clarify the PS/filler content relationship based on analytical and experimental approaches, so that guidelines for materials comparison in terms of PS and clinical selection of dental composites with various filler content can be provided.

Methods

Analytically, a simplified model based on linear elasticity was utilized to predict PS as a function of filler content under various compliances of the testing system, a cantilever beam-based instrument used in this study. The predictions were validated by measuring PS of composites synthesized using 50/50 mixtures

SUBMITTER: Wang Z 

PROVIDER: S-EPMC4861160 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature