Effect of different bonding procedure and root region on bond strength of fiber posts to root canal

Abstract

Abstract: PURPOSE: To evaluate the effect of different bonding procedure and different root region on the bond strength of fiber posts to root canal. METHODS: Forty-two extracted intact human maxillary central incisors were endodontically treated with post spaces be prepared and divided into 6 groups randomly. The fiber posts were then luted with the following different bonding procedures. Group Ⅰ: total etch dentin bonding agent Luxabond + self-adhesive system Rely XTM Unicem; Group Ⅱ: total etch dentin bonding agent Luxabond + dual-cure rein cement Luxacore; Group Ⅲ: self etch dentin bonding agent Contax + self -adhesive system Rely X TM Unicem; Group Ⅳ:self etch dentin bonding agent Contax + dual -cure rein cement Luxacore; GroupⅤ:self-adhesive system Rely X TM Unicem; Group Ⅵ:dual-cure rein cement Luxacore. After dowel cementation, thin-slice push-out test was performed. The bonding interface and dentin surface were examined under scanning electron microscope. The data was statistically analyzed using SPSS13.0 software package. RESULTS: The results showed that different bonding procedures had significant different impacts on the bond strength (P<0.05).GroupⅠand Group Ⅲ had significantly higher bond strength compared with other groups. Resin tags of dentin bonding interface were observed in GroupⅠand GroupⅡ and intimate adaptations of resin cement with the substrate were revealed. CONCLUSIONS: Coupled with total etch or self etch dentin bonding agent, self- adhesive system Rely X TM Unicem can improve the bonding strength of fiber posts obviously.

Key words: Bond strength, Fiber posts, Push-out test

CLC Number:

R783.3

ZHANG Xian-fang, XU Pei-cheng, QIAN Wen-hao. Effect of different bonding procedure and root region on bond strength of fiber posts to root canal[J]. Shanghai Journal of Stomatology, 2014, 23(3): 294-299.

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