The effects of optical conductivity of the fiber posts on the polymerization of resin cement in root canals
10.3969/j.issn.1001-3733.2017.04.004
- VernacularTitle:纤维桩导光性对根管内树脂水门汀聚合的影响
- Author:
Yu XIONG
;
Ling LUO
;
Xin WANG
;
Hui WANG
- Keywords:
Optical conductivity;
Light-curing;
Resin cement;
Fiber post;
Microhardness
- From:
Journal of Practical Stomatology
2017;33(4):447-450
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the effects of 2 kinds of fiber posts with different optical conductivity on the polymerization of resin cement in deep root canal.Methods:16 human premolars with single root were decoronated and randomly divided into 2 groups(n=8),which were restored using fiber posts with and without optical conductivity(i-TFC optical fiber post and Panavia post) respectively.Fiber posts were luted with light-curing resin cement and light cured.3 dentin slabs with fiber posts located at cervical,middle and apical 1/3 were harvested from each root.Knoop microhardness(HK) of the resin cement in each slab was measured using microindentation and the relative curing rate (RCR) was also examined,data were submitted to two-way ANOVA.Results:As the depth in the canal increased,the HK and RCR of the resin cement was decreased in both groups.At the cervical and middle 1/3 HK and RCR were not statistically different between the 2 groups(P＞0.05).At the apical 1/3 of the optical and Panavia group,the RCR of the resin cement was 69.89％ and 50.05％ (P＜0.05),the HK was 33.25 ± 3.04 and 23.08 ± 5.93 (P＜0.05),respectively.Conclusion:The optical fiber post is useful in promoting the polymerization of the resin cement in deep root canal.
