低黏度树脂黏结剂对盐酸或磷酸联合传统黏结剂酸蚀牙釉质后金属托槽黏结效果的影响。

J Adhes Dent. 2013 Dec;15(6):575-81. doi: 10.3290/j.jad.a29607.

PURPOSE

This study investigated the effect of a low-viscosity adhesive resin (Icon) applied after either hydrochloric (HCl) or phosphoric acid (H3PO4) on the adhesion of metal brackets to enamel. Failure types were analyzed.

MATERIALS AND METHODS

The crowns of bovine incisors (N = 20) were sectioned mesio-distally and inciso-gingivally, then randomly assigned to 4 groups according to the following protocols to receive mandibular incisor brackets: 1) H3PO4 (37%)+TransbondXT (3M UNITEK); 2) H3PO4 (37%)+Icon+TransbondXT; 3) HCl (15%)+Icon (DMG)+TransbondXT 4) HCl (15%)+Icon+Heliobond (Ivoclar Vivadent)+TransbondXT. Specimens were stored in distilled water at 37°C for 24 h and thermocycled (5000x, 5°C to 55°C). The shear bond strength (SBS) test was performed using a universal testing machine (1 mm/min). Failure types were classified according to the Adhesive Remnant Index (ARI). Contact angles of adhesive resins were measured (n = 5 per adhesive) on ceramic surfaces.

RESULTS

No significant difference in SBS was observed, implying no difference between combinations of adhesive resins and etching agents (p = 0.712; ANOVA). The Weibull distribution presented significantly lower Weibull modulus (m) of group 3 (m = 2.97) compared to other groups (m = 5.2 to 6.6) (p < 0.05). The mean SBS results (MPa) in descending order were as follows: group 4 (46.7 ± 10.3) > group 1 (45.4 ± 7.9) > group 2 (44.2 ± 10.6) > group 3 (42.6 ± 15.5). While in groups 1, 3, and 4 exclusively an ARI score of 0 (no adhesive left on tooth) was observed, in group 2, only one specimen demonstrated score 1 (less than half of adhesive left on tooth). Contact angle measurements were as follows: Icon (25.86 ± 3.81 degrees), Heliobond (31.98 ± 3.17 degrees), TransbondXT (35 ± 2.21 degrees).

CONCLUSION

Icon can be safely used with the conventional adhesives tested on surfaces etched with either HCl or H3PO4.

目的

本研究旨在探讨盐酸（HCl）或磷酸（H3PO4）处理后应用低粘度树脂胶（Icon）对金属托槽与牙釉质黏附力的影响。分析了失效类型。

材料与方法

将牛切牙的牙冠（N = 20）沿近远中向和切龈向分段，然后根据以下方案随机分为 4 组，分别接受下颌切牙托槽：1）H3PO4（37%）+TransbondXT（3M UNITEK）；2）H3PO4（37%）+Icon+TransbondXT；3）HCl（15%）+Icon（DMG）+TransbondXT；4）HCl（15%）+Icon+Heliobond（Ivoclar Vivadent）+TransbondXT。将标本在 37°C的蒸馏水中储存 24 小时，然后进行热循环（5000x，5°C 至 55°C）。使用万能试验机（1mm/min）进行剪切黏结强度（SBS）测试。根据黏附残余指数（ARI）对失效类型进行分类。对陶瓷表面的黏附树脂的接触角进行测量（每个黏附剂 n = 5）。

结果

SBS 无显著差异，表明黏附树脂和酸蚀剂的组合无差异（p = 0.712；ANOVA）。威布尔分布显示，与其他组相比，第 3 组的威布尔模数（m）明显较低（m = 2.97）（p < 0.05）。SBS 结果（MPa）的平均值按降序排列如下：第 4 组（46.7 ± 10.3）>第 1 组（45.4 ± 7.9）>第 2 组（44.2 ± 10.6）>第 3 组（42.6 ± 15.5）。第 1、3 和 4 组仅观察到 ARI 评分 0（牙上无残留黏附剂），而第 2 组仅有一个标本显示评分 1（牙上残留不到一半的黏附剂）。接触角测量结果如下：Icon（25.86 ± 3.81 度）、Heliobond（31.98 ± 3.17 度）、TransbondXT（35 ± 2.21 度）。