Abstract

The cervical area of teeth is the most unpredictable region for durable adhesive bonding. This study evaluated the adhesion potential of resin cement to coronal and cervical/root structures with a focus on enamel, dentin and cementum using etch-and-rinse and self-etch adhesive systems. Anterior teeth (N = 60) were randomly divided into six groups for adhesion tests: (a) unprepared enamel (UE), (b) ground enamel (GE), (c) mid-coronal dentin (D), (d) cervical enamel 2 mm above cementoenamel junction (CE), (e) cementoenamel junction (CEJ), and (f) root cementum (RC). Enamel and dentin surfaces were conditioned using either an etch-and-rinse (Syntac Classic-SY) or self-etch (Clearfil S3 Bond Plus-CS3) adhesive system. Resin cement (Variolink Esthetic) was adhered to the different substrates using polyethylene molds and photo-polymerized. Bonded specimens were stored in water for 24 h at 37 °C. Microshear tests (µSBT) were conducted in a Universal Testing Machine (1 mm/min) and failure types were analyzed after debonding. Data were analyzed using two-way ANOVA and t-test (alpha = 0.05). While substrate type (p < 0.001) and adhesive system (p < 0.001) significantly affected the bond results, interaction terms were not significant (p = 0.063). Within SY adhesive system, adhesion to all substrates were not significant ranging between (8.07 ± 2.39–6.80 ± 4.60) (p > 0.05), except for CEJ (5.19 ± 1.39) and RC (4.08 ± 1.13). With the CS3 adhesive system, all groups presented non-significant results (4.15 ± 1.35–6.04 + 2.38) (p > 0.05), except for D (3.57 ± 1.84) and RC (3.21 ± 1.13) (p < 0.05). µSBT values for D (7.19 ± 2.31) and RC (4.08 ± 1.13) were significantly higher for SY compared to that of CS3 (3.57 ± 1.84–3.21 ± 1.13, respectively) (p < 0.05).

摘要

牙齿的颈部区域是最难以预测的持久粘合区域。本研究评估了树脂水门汀对冠状和宫颈/牙根结构的粘附潜力，重点是使用蚀刻和冲洗和自酸蚀粘合剂系统对牙釉质、牙本质和牙骨质的粘附。前牙（N = 60) 随机分为六组进行粘连试验：(a) 未制备的牙釉质 (UE)，(b) 研磨牙釉质 (GE)，(c) 中冠牙本质 (D)，(d) 牙釉质 2 mm 以上牙骨质界 (CE)、(e) 牙骨质界 (CEJ) 和 (f) 牙骨质 (RC)。牙釉质和牙本质表面使用蚀刻和冲洗 (Syntac Classic-SY) 或自蚀刻 (Clearfil S3 Bond Plus-CS3) 粘合剂系统进行调节。使用聚乙烯模具将树脂粘固剂（Variolink Esthetic）粘附到不同的基材上并进行光聚合。粘合的样品在 37°C 的水中储存 24 小时。微剪切试验 (µSBT) 在万能试验机 (1 mm/min) 上进行，在脱粘后分析失效类型。使用双向方差分析和t检验 (alpha = 0.05) 分析数据。而基材类型（p  < 0.001）和粘合剂系统（p  < 0.001）显着影响粘合结果，相互作用项不显着（p  = 0.063）。在 SY 粘合剂系统中， 除 CEJ (5.19 ± 1.39) 和 RC (4.08 ± 1.13) 外，对所有基材的附着力在 (8.07 ± 2.39–6.80 ± 4.60) ( p > 0.05)之间不显着。使用 CS3 粘合剂系统， 除 D (3.57 ± 1.84) 和 RC (3.21 ± 1.13) ( p  < 0.05)外，所有组均呈现非显着结果 (4.15 ± 1.35–6.04 + 2.38) ( p > 0.05)。SY 的 D (7.19 ± 2.31) 和 RC (4.08 ± 1.13) 的 µSBT 值显着高于 CS3（分别为 3.57 ± 1.84–3.21 ± 1.13）（p  < 0.05）。