【摘要】 背景:树脂水门汀与牙本质的粘接界面是纤维桩粘接的薄弱环节,进一步提高自粘接树脂水门汀与根管牙本质的粘接强度具有重要的临床意义。目的:探讨磷酸酸蚀、自酸蚀及酸蚀后使用粘接剂预处理栓道根管牙本质,对自粘接树脂水门汀Embrace CoreTM Resin Cement粘接纤维桩粘接强度的影响。方法:取25颗离体人下颌单根管尖牙或前磨牙,常规根管充填与桩道预备后,随机分为5组进行不同根管内壁处理(n=5):Ⅰ组(对照组)采用生理盐水冲洗;Ⅱ组采用35%磷酸酸蚀15 s;Ⅲ组采用CLEARFILTM SE BOND牙质黏结预处理剂自酸蚀20 s;Ⅳ组采用35%磷酸酸蚀15 s后,涂布single bond 2粘接剂;Ⅴ组采用CLEARFILTM SE BOND牙质黏结预处理剂自酸蚀20 s后,涂布CLEARFILTM SE BOND黏合剂。5组标本使用自粘接树脂水门汀EmbraceC oreTM Resin Cement粘接纤维桩,以微推出实验法测试粘接强度,体视显微镜观察破坏方式。结果与结论:(1)Ⅰ-Ⅴ组粘接强度分别为(8.66±2.43),(7.05±3.03),(7.37±2.83),(9.88±2.93),(10.04±2.86)MPa。Ⅱ组、Ⅳ组、Ⅴ组粘接强度与Ⅰ组比较差异有显著性意义(P<0.05),Ⅲ组粘接强度与Ⅰ组比较差异无显著性意义(P>0.05);(2)Ⅰ组、Ⅱ组、Ⅲ组的破坏模式以A1和A2型破坏为主,B1和B2型破坏较少;Ⅳ组及Ⅴ组的破坏模式仍以A1和A2型破坏为主,但A1和A2型破坏数量减少,B1型破坏和B2型破坏数量增多;(3)结果表明,使用磷酸或自酸蚀处理剂预处理桩道根管牙本质均不能提高EmbraceC oreTM Resin Cement粘接纤维桩的粘接强度,酸蚀处理后使用相应的粘接剂可提高其粘接强度。更多还原

【Abstract】 BACKGROUND: The bonding interface of resin cements with dentin is unstables, therefore, improvement on the bonding strength is of great significance.OBJECTIVE: To evaluate the effects of different pretreatments to post space on bonding strength of the self-adhesive resin cement Embrace CoreTM Resin Cement to fiber posts after phosphoric acid etching or self-etching. METHODS: Twenty-five human mandible canines or premolars with single-rooted canal were selected. After conventional root canal treatment and post space preparation, they were randomly divided into five groups(n=5 per group): group I(control group): 0.9% normal saline irrigation; group II: etching with 35% phosphoric acid for 15 seconds; group III: self-etching with CLEARFILTM SE BOND binder for 20 seconds; group IV: etching with 35% phosphoric acid for 15 seconds and bonding with single bong 2; group V: self-etching with CLEARFILTM SE BOND binder for 20 seconds and bonding with CLEARFILTM SE BOND binder. Fiber posts were edusing self-adhesive resin cement Embrace CoreTM Resin Cement. The thin-slice push-out test was performed to record the bonding strengths, and the failure modes of fiber posts were observed by stereomicroscope. RESULTS AND CONCLUSION: The bond strength of groups I-V were as follows:(8.66±2.43),(7.05±3.0),(7.37±2.83),(9.88±2.9), and(10.04±2.86) MPa. Groups II, IV and V showed significantly different bond strength from the group I(P < 0.05), but there were no significant differences between groups III and I(P > 0.05). The main failure models in the groups I, II and III were A1 and A2, and less B1 and B2 appeared. The failure modes in the groups IV and V also focused on the A1 and A2, but B1 and B2 increased gradually. These results indicate that neither the pretreatments by phosphoric acid etching nor by self-etching in root canal dentin can improve the bonding strength of Embrace CoreTM Resin Cement to fiber posts, but the use of binder relative to phosphoric acid etching or self-ctching is helpful.更多还原