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Degradation resistance of ormocer- and dimethacrylate-based matrices with different filler contents
- Source :
-
Journal of Dentistry . Jan2012, Vol. 40 Issue 1, p86-90. 5p. - Publication Year :
- 2012
-
Abstract
- Abstract: Objectives: To investigate the influence of matrix and filler content on degradation resistance of an experimental pure-ormocer and an dimethacrylate-based composite derived from a commercially available material. Materials and methods: A dimethacrylate- Grandio (GR) and a model pure ormocer-based-matrix ORMOCER (ORM) were used. Each material had three different types according to their filler content (% w/w): regular (87% and 86%), flowable (80% and 79%) and fissure sealer (70% and 69%) for GR and ORM respectively. Disc-shaped (1mm thickness×10mm diameter) samples were prepared for each material (n =6). Water sorption and solubility tests were adapted from ISO4049. To evaluate porosity, specimens were scanned at a resolution of 19.4μm and 3D reconstructions were made. The volume ratio of pores in the specimens were calculated and expressed as percentages. The results were submitted to 2-way ANOVA (factors: matrix and filler content) and Tukey post-hoc statistic test (p =0.05). Results: Filler content influenced the water sorption for the ormocer-matrix and the water solubility for the dimethacrylates. ORMOCER regular was a less porous material compared to flowable and sealer formulations. On the other hand, the filler content had no effect on porosity for Grandio. Conclusion: Modifications made in the pure ormocer-matrix formulation were not significantly important to produce a more water-stable material compared to the dimethacrylate-matrix composite materials. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03005712
- Volume :
- 40
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Dentistry
- Publication Type :
- Academic Journal
- Accession number :
- 70043493
- Full Text :
- https://doi.org/10.1016/j.jdent.2011.10.012