Evaluation of polymerization shrinkage stress in silorane-based composites.
10.5395/JKACD.2011.36.3.188
- Author:
Seung Ji RYU
1
;
Ji Hoon CHEON
;
Jeong Bum MIN
Author Information
1. Department of Conservative Dentistry, Chosun University School of Dentistry, Gwangju, Korea. minjb@chosun.ac.kr
- Publication Type:Original Article
- Keywords:
Methacrylate composite;
Polymerization shrinkage stress;
Silorane composite;
Strain gauge
- MeSH:
Composite Resins;
Elastic Modulus;
Light;
Polymerization;
Polymers;
Sprains and Strains
- From:Journal of Korean Academy of Conservative Dentistry
2011;36(3):188-195
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVES: The purpose of this study was to evaluate the polymerization shrinkage stress among conventional methacrylate-based composite resins and a silorane-based composite resin. MATERIALS AND METHODS: The strain gauge method was used for the determination of polymerization shrinkage strain. Specimens were divided by 3 groups according to various composite materials. Filtek Z-250 (3M ESPE) and Filtek P-60 (3M ESPE) were used as a conventional methacrylate-based composites and Filtek P-90 (3M ESPE) was used as a silorane-based composites. Measurements were recorded at each 1 second for the total of 800 seconds including the periods of light application. The results of polymerization shrinkage stress were statistically analyzed using One way ANOVA and Tukey test (p = 0.05). RESULTS: The polymerization shrinkage stress of a silorane-based composite resin was lower than those of conventional methacrylate-based composite resins (p < 0.05). The shrinkage stress between methacrylate-based composite resin groups did not show significant difference (p > 0.05). CONCLUSIONS: Within the limitation of this study, silorane-based composites showed lower polymerization shrinkage stress than methacrylate-based composites. We need to investigate more into polymerization shrinkage stress with regard to elastic modulus of silorane-based composites for the precise result.
