The aim of the present study was to evaluate the shear bond strength (SBS) of bioactive cement (BAC) in comparison to conventional dual cure resin-modified glass ionomer cement (RMGIC) with Er,Cr:YSGG laser (ECL) dentin photo biomodulation. Methods: One hundred and twenty extracted human molars were allocated in eight groups (n = 15) based on surface conditioning and cement type. Specimens of groups 2 and 6 were conditioned with ECL whereas, groups 3 and 7 were treated with ECL + ethylenediamine tetra acetic acid (EDTA). Specimens in groups 4 and 8 were surface conditioned by ECL + EDTA + Tetric-N-Bond, and groups 1 and 5 were considered as control (non-surface treated). Cement build-ups were performed on the surface-treated dentin with BAC (groups 1–4) and RMGIC (groups 5–8). A universal testing machine was used to measure the SBS and the mode of failure was evaluated using a stereomicroscope. Statistical analysis was performed using an analysis of variance and Tukey’s post hoc test, at a significance level of p < 0.001. Results: The highest SBS values were observed in group 8, ECL + EDTA + Tetric-N-Bond + RMGIC (21.54 ± 3.524 MPa) and the lowest SBS values were displayed by group 1, with no surface treatment and BAC application (11.99 ± 0.821 MPa). The majority of failures were found to be mixed in lased dentin-treated dentin surfaces. BAC when bonded to dentin surfaces conditioned with ECL showed lower SBS in comparison to RMGIC. Conclusion: Conditioning of dentin with ECL and a bonding agent (Tetric-N-bond) improved bond strength scores for BAC and RMGIC. Use of EDTA improved bond strength values when bonded to BAC and RMGIC; however, this improvement was not statistically significant.

中文翻译：

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Er,Cr: YSGG 激光光生物调制对生物活性和树脂改性玻璃离子水门汀粘接牙本质的影响

本研究的目的是评估生物活性水泥 (BAC) 与常规双固化树脂改性玻璃离子水门汀 (RMGIC) 与 Er,Cr:YSGG 激光 (ECL) 牙本质光生物调制的剪切粘合强度 (SBS) . 方法：根据表面处理和水泥类型，将 120 颗拔除的人类磨牙分为 8 组（n = 15）。第 2 组和第 6 组的标本用 ECL 处理，而第 3 组和第 7 组用 ECL + 乙二胺四乙酸 (EDTA) 处理。第 4 组和第 8 组中的样品通过 ECL + EDTA + Tetric-N-Bond 进行表面处理，第 1 组和第 5 组被认为是对照（非表面处理）。用 BAC（第 1-4 组）和 RMGIC（第 5-8 组）在表面处理的牙本质上进行水泥堆积。使用通用试验机测量 SBS，并使用立体显微镜评估故障模式。使用方差分析和 Tukey 事后检验进行统计分析，显着性水平为 p < 0.001。结果：第 8 组 SBS 值最高，ECL + EDTA + Tetric-N-Bond + RMGIC (21.54 ± 3.524 MPa)，第 1 组 SBS 值最低，未进行表面处理和 BAC 应用 (11.99 ± 0.821 兆帕）。发现大多数故障混合在激光牙本质处理的牙本质表面中。与 RMGIC 相比，当 BAC 与经 ECL 调节的牙本质表面结合时，其 SBS 较低。结论：用 ECL 和粘合剂（Tetric-N-bond）调理牙本质可提高 BAC 和 RMGIC 的粘合强度得分。与 BAC 和 RMGIC 粘合时，使用 EDTA 可提高粘合强度值；然而，这种改善在统计上并不显着。