Biaxial Flexural strength of restorative resin composites
Authors :
- Kamala Kritopakan
- Rangsima Sakoolnamarka
- Suchit Poolthong
Abstract :
Objective To compare the biaxial flexural strengths of five current restorative resin composites which contain different types of filler and resin matrix.
Materials and methods Five resin composites, namely Admira (Voco), CeramX (Dentsply), Filtek Supreme translucent (3M ESPE), Filtek Supreme standard (3M ESPE) and Z250 (3M ESPE), were used. Fifteen resin composite discs (13 mm in diameter and 2 mm thick) were prepared for each product and stored in 37 °C distilled water prior to testing. The biaxial flexural tests were conducted using the universal testing machine at a cross head speed of 0.5 mm per minute. The statistical analysis used was one-way ANOVA and Tukey’s HSD multiple comparison.
Results Filtek Supreme translucent showed the highest biaxial flexural strength (167.3 MPa). The mean biaxial flexural strengths of Filtek Supreme standard and Z250 were 154.78 and 147.01 MPa, respectively. They were not significantly higher than CeramX.
Conclusion Among the resin composites used in this study, resin composite with small filler particles showed higher biaxial flexural strength than those with larger filler particles. Resin composite with ormocer molecules did not show improved biaxial flexural strength.
(CU Dent J. 2006;29:1-12)
Keywords :
flexural strength; ORMOCER; resin composite
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