PMID: 20635048Jul 17, 2010Paper

The effect of light transmission of canal posts on the depth of cure of resin composite

Shanghai kou qiang yi xue = Shanghai journal of stomatology
Yi-xi Luo

Abstract

To evaluate the efficacy of roots reinforced by light-cured composite resin through three different posts in simulated teeth. Simulated metal mold as flared canal was filled with resin composite in which three kinds of posts were inserted into the center separately and photopolymerized through them. Cured resins were sectioned vertically, then invested and polished. Hardness measurements were made from up to bottom per 1mm at two horizontal distances (d1=0.5mm,d2=1.5mm) from the central post. SAS 6.12 software package was used for statistical analysis. With the increase in width, there was no difference for decrease among the three groups. There was difference in the width of cure between d1 and d2 in 3 groups. As the depth increased, difference of decrease was found among the three groups. Decline of light-transmitting post was the minimal,while that of post B(match-post) was the maximal.There was significant difference in the depth of cure between the light-transmitting post and two control posts (P<0.05). The results suggest that light-transmitting post has a remarkable utility compared with the control posts.Using light-transmitting post reconstructing flared roots may reaches a better outcome.

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