Correlation between polymerization shrinkage stress and C-factor depends upon cavity compliance

Dental Materials : Official Publication of the Academy of Dental Materials
Zhengzhi Wang, Martin Y M Chiang

Abstract

The literature reports inconsistent results regarding using configuration factor (C-factor) as an indicator to reflect the generation of polymerization shrinkage stress (PS) from dental restorative composites due to the constraint of cavity configuration. The current study aimed at unraveling the complex effects of C-factor on PS based on analytical and experimental approaches together, such that the reported inconsistency can be explained and a significance of C-factor in clinic can be comprehensively provided. Analytical models based on linear elasticity were established to predict PS measured in instruments (testing systems) with different compliances, and complex effects of C-factor on PS were derived. The analyses were validated by experiments using a cantilever beam-based instrument and systematic variation of instrumental compliance. For a general trend, PS decreased with increasing C-factor when measured by instruments with high compliance. However, this trend gradually diminished and eventually reversed (PS became increased with increasing C-factor) by decreasing the system compliance. Our study indicates that the correlation between PS and C-factor are highly dependent on the compliance of testing instrument for PS me...Continue Reading

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Citations

Feb 27, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Zhengzhi Wang, Martin Y M Chiang
Jul 4, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Seung-Hoon HanSung-Ho Park
Mar 3, 2018·Journal of Functional Biomaterials·Diane R BienekDrago Skrtic
Jan 3, 2021·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Ghalia BhadilaHockin H K Xu
Nov 9, 2017·Dental Materials : Official Publication of the Academy of Dental Materials·Xiaohong WangJirun Sun
Feb 27, 2021·Scientific Reports·Raju RajuB Gangadhara Prusty
Jun 9, 2020·Dental Materials : Official Publication of the Academy of Dental Materials·Jing FuAlex S L Fok

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