Understanding the Effect of Thermal Treatment on the Physico-Mechanical Properties of Light-Cured Composites for use in Indirect Restorations.
(2021) European Journal of Prosthodontics and Restorative Dentistry — Vol. 29, n° 1, p. 35-45 (2021)
Files
2021_Hardy_Eur_J_Prosthodont_Restor_Dent_Ab.pdf
Abstract Scopus
Open Access - Adobe PDF
- 320.2 KB
Details
- Authors
- Abstract
- OBJECTIVES: To study the potential benefits of a post-cure thermal treatment on key physico-mechanical properties of light-cured resin-based composites for use in indirect restorations, a CAD/CAM composite block being used as control. MATERIAL AND METHODS: Six commercial composites were light-cured before being thermally treated in a furnace at 90°C during 15 minutes (CAD/CAM composite used as a control). The properties measured with or without thermal treatment were: degree of conversion, flexural strength, elastic modulus, Vickers microHardness, organic mass content and eluted and absorbed mass before and after storage in ethanol. The data were analysed using one-way ANOVA, and Weibull distributions. RESULTS: A general increase in the properties measured was observed for all materials after thermal treatment, except a general decrease in mass elution and absorption (most statistically significant: p⟨0.05). Weibull analysis showed a tendency (p⟩0.05) of increased reliability of the flexural strength after thermal treatment for all materials. CONCLUSION: The present data revealed clear physico-mechanical improvements after thermal treatment of light-cured composites. Such method could hence be beneficially used to produce indirect restorations as compared to stratifying and light-curing the same composites in situ. However, most properties of the control CAD/CAM composite were higher, but CAD/CAM technologies aren't available everywhere.
- Affiliations
Citations
Hardy, C., Dive, D., Leloup, G., Leprince, J., & Randolf, L. (2021). Understanding the Effect of Thermal Treatment on the Physico-Mechanical Properties of Light-Cured Composites for use in Indirect Restorations. European Journal of Prosthodontics and Restorative Dentistry, 29(1), 35-45. https://doi.org/10.1922/EJPRD_2143Hardy11 (Original work published 2021)