Department of Operative Dentistry, Biomaterials Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Clin Exp Dent Res. 2022 Dec;8(6):1575-1581. doi: 10.1002/cre2.651. Epub 2022 Aug 25.
Effective bond strength of composite resin restoration leads to its durability, so evaluation of dentin surface treatment with enzymes and laser for higher bond strength is an important factor.
Sixty human molar teeth were cut at a depth of 2 mm of occlusal part and divided into six groups (n = 10). G1: etched with 37% phosphoric, G2 and G3: 10% papain or bromelain enzymes were used on the dentinal surface, G4: 10% papain and bromelain enzyme mixture were used for. Then, the specimens were washed with distilled water. In G5 and G6: Er:YAG or Co2 lasers were used on the dentin surface. An adhesive system was applied and then nanohybrid composite was placed in teflon mold and light cured. Samples were subjected to a shear bond strength (SBS) test by universal testing machines. Statistical analysis was performed, using one-way analysis of variance and Tukey HSD tests (p < .05).
The mean SBS in G1 was significantly higher in comparison with the other groups (p < .0001). On the other hand, a comparison of mean SBS between groups 2, 3, 4, and 5 shows no significant differences (p = .221). The mean SBS in group 6 (Co2 laser) was significantly lower in comparison with the other groups (p < .0001).
Results showed that SBS of composite resin to dentin was not significantly affected, using either bromelain or papain 10% enzymes or erbium laser. Co2 laser had a negative effect on dentin and decreased the SBS. Phosphoric acid has the best result.
复合树脂修复的有效粘结强度使其具有耐用性，因此评估酶和激光处理牙本质表面以提高粘结强度是一个重要因素。
将 60 个人类磨牙在咬合面深度 2mm 处切割，并分为 6 组（n=10）。G1：用 37%磷酸酸蚀；G2 和 G3：牙本质表面使用 10%木瓜蛋白酶或菠萝蛋白酶；G4：使用 10%木瓜蛋白酶和菠萝蛋白酶混合物；然后用蒸馏水冲洗标本。在 G5 和 G6 中：牙本质表面使用 Er:YAG 或 Co2 激光。应用粘结系统，然后将纳米复合树脂放入特氟龙模具中光固化。通过万能试验机对样品进行剪切粘结强度（SBS）测试。使用单因素方差分析和 Tukey HSD 检验进行统计分析（p<0.05）。
与其他组相比，G1 的平均 SBS 显著更高（p<0.0001）。另一方面，组 2、3、4 和 5 之间平均 SBS 的比较无显著差异（p=0.221）。与其他组相比，G6（Co2 激光）的平均 SBS 显著更低（p<0.0001）。
结果表明，使用 10%的菠萝蛋白酶或木瓜蛋白酶或铒激光处理牙本质，对复合树脂与牙本质的 SBS 没有显著影响。Co2 激光对牙本质有负面影响，降低了 SBS。磷酸具有最佳效果。
