Navarra Chiara Ottavia, Goracci Cecilia, Breschi Lorenzo, Vichi Alessandro, Corciolani Gabriele, Cadenaro Milena, Ferrari Marco
Department of Biomedicine, Division of Dental Sciences and Biomaterials, University of Trieste, Italy.
Am J Dent. 2012 Feb;25(1):17-20.
To assess the degree of conversion (DC) at different levels of a resin-based luting agent used with different commercial posts.
A resin-based luting agent (Variolink II) was light-cured in a simulated dowel space in combination with different fiber posts: GC Fiber Post (GC), DT Light Safety Lock (SL), RelyX Fiber Post (RX), Reforpost (RE), DT Light Post Illusion (LPI), FRC Postec Plus (FP), Radix (RA), Snowpost (SP), Dentin Post X (DP), Macrolock Illusion (MI), and Composipost (CP). After 24 hours, DC was assessed through micro-Raman analysis at the coronal, middle, and apical thirds. Two-way ANOVA and Tukey test were used for post-hoc comparisons (P<0.05).
The results demonstrated that the post-type, dowel space level, and between-factor interaction were statistically significant (P<0.001). Differences in DC were observed at different depths for RX, RE, LPI, SL, DP, MI and CP, decreasing from the coronal to the apical third. Although the resin-based luting agent should be able to polymerize in absence of light, a higher DC was found following light irradiation (with a decreasing effect from the coronal to the apical third).
