Journal article
Shrinkage, stress, and modulus of dimethacrylate, ormocer, and silorane composites
Journal of conservative dentistry, Vol.18(5), pp.384-388
09/01/2015
DOI: 10.4103/0972-0707.164051
PMCID: PMC4578183
PMID: 26430302
Abstract
to evaluate the shrinkage, polymerization stress, elastic and bulk modulus resulting from composites formulated by siloranes, 2(nd) generation ormocers, and dimethacrylates.
The bonded disc method was used to evaluate volumetric shrinkage. The polymerization stress was evaluated by mean of the Bioman. Cylindrical specimens (5 mm thickness and 6 mm diameter) were submitted to gradual loading. Young's and bulk modulus were obtained from the slope of the stress/strain curve. Data were analyzed using one-way analysis of variance and Tukey's test (5%).
Grandio and ormocer showed significant higher elastic and bulk modulus. Silorane presented significant lowest bulk modulus and maximum shrinkage. Ormocer and silorane presented lower values for the maximum rate of shrinkage. Extra-low shrinkage (ELS) composite presented the greatest maximum shrinkage. The higher maximum rate of shrinkage was attained by Grandio and ELS, statistically similar from each other. The silorane showed lower values of maximum stress and maximum rate of stress. The higher values of maximum stress were presented by ELS and Grandio, statistical similar between them. Grandio showed the significantly greatest maximum rate of stress.
Silorane showed to promote lower shrinkage/stress among the composites, with the lowest elastic modulus. Ormocer showed lower shrinkage/stress than methacrylates despite of its high modulus.
Details
- Title: Subtitle
- Shrinkage, stress, and modulus of dimethacrylate, ormocer, and silorane composites
- Creators
- Atais Bacchi - Faculdade MeridionalVictor Pinheiro Feitosa - Universidade Federal do CearáAndrea Soares Quirino da Silva Fonseca - University of AmsterdamLarissa Maria Assad Cavalcante - Universidade Federal FluminenseNikolaos Silikas - University of ManchesterLuis Felipe Jochins Schneider - University of Amsterdam
- Resource Type
- Journal article
- Publication Details
- Journal of conservative dentistry, Vol.18(5), pp.384-388
- Publisher
- Medknow
- DOI
- 10.4103/0972-0707.164051
- PMID
- 26430302
- PMCID
- PMC4578183
- ISSN
- 0972-0707
- eISSN
- 0974-5203
- Language
- English
- Date published
- 09/01/2015
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984654466702771
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