Bonding properties of four different cements to glass fiber posts after different treatments
10.3760/cma.j.issn.1002-0098.2014.03.009
- VernacularTitle:老化对四种水门汀与纤维桩粘接性能影响的对比实验
- Author:
Xiaojing LI
1
;
Sanjun ZHAO
;
Lijuan SHEN
;
Shuai XU
;
Jiaqi SUN
;
Jihua CHEN
Author Information
1. 第四军医大学口腔医学院修复科
- Keywords:
Dental cements;
Cementation;
Post and core technique
- From:
Chinese Journal of Stomatology
2014;49(3):166-170
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of four different cements on the bonding effectiveness of root canal dentine and fiber post before and after different treatments.Methods A total of 216 freshly extracted sound single-root-canal mandibular premolars were randomly divided into four groups.After root canal treatment and post space preparation being conducted on the premolars,Fuji Ⅰ,Fuji Cem,RelyX Unicem,RelyX ARC were used respectively to bond fiber posts and were marked with group A,B,C,and D.Microleakage,micromorphology of the bonded interfaces,and pull-out bond strength were evaluated in the immediate group,thermocycling group and thermomechanical loading group.Results In the immediate group,samples in group D showed the highest bond strength [(278 ± 26) N],followed by group C[(219 ±12) N],B[(104 ±23) N] and A[(73 ±8) N].Significant differences were found among all groups (P ＜ 0.05).A significant increase in bond strength was found in group A and B,whereas a decrease tendency was detected in group C and D after different treatments.Scanning electron microscope indicated that some little gaps were observed in group D after treatment,while a more intense bonding interface was found in group A and B.Microleakage scores in group A and B were lower than those in group C and D after aging treatments.Conclusions Resin cement can achieve a better immediate bond strength,while resinmodified resin cement may acquire a better long-term retention.
