两种树脂水门汀在不同粘结策略下对牙本质粘结强度的比较。

Department of Dental Materials and Prosthodontics, São José dos Campos Dental School, São Paulo State University (UNESP), São Paulo, Brazil.

J Esthet Restor Dent. 2010 Aug;22(4):262-8. doi: 10.1111/j.1708-8240.2010.00349.x.

PURPOSE

This study evaluated the microtensile bond strength of two resin cements to dentin either with their corresponding self-etching adhesives or employing the three-step "etch-and-rinse" technique. The null hypothesis was that the "etch-and-rinse" adhesive system would generate higher bond strengths than the self-etching adhesives.

MATERIALS AND METHODS

Thirty-two human molars were randomly divided into four groups (N = 32, n = 8/per group): G1) ED Primer self-etching adhesive + Panavia F; G2) All-Bond 2 "etch-and-rinse" adhesive + Panavia F; G3) Multilink primer A/B self-etching adhesive + Multilink resin cement; G4) All-Bond 2 + Multilink. After cementation of composite resin blocks (5 x 5 x 4 mm), the specimens were stored in water (37 degrees C, 24 hours), and sectioned to obtain beams (+/-1 mm(2) of adhesive area) to be submitted to microtensile test. The data were analyzed using 2-way analysis of variance and Tukey's test (alpha = 0.05).

RESULTS

Although the cement type did not significantly affect the results (p = 0.35), a significant effect of the adhesive system (p = 0.0001) was found on the bond strength results. Interaction terms were not significant (p = 0.88751). The "etch-and-rinse" adhesive provided significantly higher bond strength values (MPa) with both resin cements (G2: 34.4 +/- 10.6; G4: 33.0 +/- 8.9) compared to the self-etching adhesive systems (G1: 19.8 +/- 6.6; G3: 17.8 +/- 7.2) (p < 0.0001). Pretest failures were more frequent in the groups where self-etching systems were used.

CONCLUSION

Although the cement type did not affect the results, there was a significant effect of changing the bonding strategy. The use of the three-step "etch-and-rinse" adhesive resulted in significantly higher bond strength for both resin cements on dentin.

CLINICAL SIGNIFICANCE

Dual polymerized resin cements tested could deliver higher bond strength to dentin in combination with "etch-and-rinse" adhesive systems as opposed to their use in combination with self-etching adhesives.

目的

本研究评估了两种树脂水门汀与相应的自酸蚀黏结剂或采用三步“酸蚀-冲洗”技术联合使用时对牙本质的微拉伸黏结强度。零假设为“酸蚀-冲洗”黏结系统产生的黏结强度高于自酸蚀黏结剂。

材料和方法

32 颗人磨牙随机分为四组（N = 32，n = 8/组）：G1）ED 底漆自酸蚀黏结剂+ Panavia F；G2）All-Bond 2“酸蚀-冲洗”黏结剂+ Panavia F；G3）Multilink 底漆 A/B 自酸蚀黏结剂+ Multilink 树脂水门汀；G4）All-Bond 2+Multilink。复合树脂块（5x5x4mm）黏结后，将样本储存在水中（37°C，24 小时），并切成小条（+/-1mm²的黏结面积）进行微拉伸测试。使用双因素方差分析和 Tukey 检验（α=0.05）对数据进行分析。

结果

尽管黏结剂类型对结果没有显著影响（p=0.35），但黏结系统（p=0.0001）对黏结强度结果有显著影响。交互项无显著差异（p=0.88751）。与自酸蚀黏结系统（G1：19.8±6.6；G3：17.8±7.2）相比，“酸蚀-冲洗”黏结系统联合两种树脂水门汀时（G2：34.4±10.6；G4：33.0±8.9）提供了更高的黏结强度值（MPa）（p<0.0001）。使用自酸蚀系统时，预测试失败更频繁。