Polymerization Shrinkage and Flexural Modulus of Flowable Dental Composites
AUTOR(ES)
Xavier, Janaína Cavalcanti, Monteiro, Gabriela Queiroz de Melo, Montes, Marcos Antonio Japiassú Resende
FONTE
Materials Research
DATA DE PUBLICAÇÃO
2010-09
RESUMO
Linear polymerization shrinkage (LPS), flexural strength (FS) and modulus of elasticity (ME) of low-viscosity resin composites (Admira Flow™, Grandio Flow™/VOCO; Filtek Z350 Flow™/3M ESPE; Tetric Flow™/Ivoclar-Vivadent) was evaluated using a well-established conventional micro-hybrid composite as a standard (Filtek Z250™/3M ESPE). For the measurement of LPS, composites were applied to a cylindrical metallic mould and polymerized (n = 8). The gap formed at the resin/mould interface was observed using SEM (1500×). For FS and ME, specimens were prepared according to the ISO 4049 specifications (n = 10). Statistical analysis of the data was performed with one-way ANOVA and the Tukey test. The conventional resin presented significantly lower LPS associated with high FS and ME, but only the ME values of the conventional resin differed significantly from the low-viscosity composites. The relationship between ME and LPS of low-viscosity resin composites when used as restorative material is a critical factor in contraction stress relief and marginal leakage.
Documentos Relacionados
- Evaluation of linear polymerization shrinkage, flexural strength and modulus of elasticity of dental composites
- Silorane- and high filled-based"low-shrinkage" resin composites: shrinkage, flexural strength and modulus
- Shrinkage stress and elastic modulus assessment of bulk-fill composites
- Polymerization shrinkage stress of composites photoactivated by different light sources
- Polymerization Shrinkage of Bulk Fill Composites and its Correlation with Bond Strength