AIM The aim of the study was to investigate the shear bond strength (SBS) and compressive strength (CS) of Er Cr YSGG laser (ECL) treated, re-bonded lithium disilicate (LD) ceramic in comparison to standard conventional conditioning (hydrofluoric acid (HFA) and silane). METHODS One hundred LD ceramic disks were divided equally for SBS and CS testing. Eighty samples were conventionally surface treated and bonded to resin cement followed by de-bonding of the cement build-up. All de-bonded specimens were divided into four groups based on re-bonding surface treatments (HFA, primer, adhesive, and ECL). Resin cement build-ups were performed in 40 specimens for SBS testing (universal testing machine); however, the remaining 40 specimens were tested for CS. Ten specimens each were used as controls (surface treatment was performed once and no primary resin cement bonding) for SBS and CS assessment. Surface topography was assessed using a scanning electron microscope. RESULTS The maximum and minimum SBS values were shown by groups: control (33.42 ± 3.28 megapascals (MPa)); and ECL (17.50 ± 2.22 MPa) respectively. The maximum and minimum CSs were displayed by specimens in the ECL group (439.45 ± 70.68 MPa) and the control group (237.28 ± 19.96 MPa), respectively. For ECL specimens, SBS was significantly lower and CS was significantly higher as compared to control specimens. CONCLUSIONS Application of the Er Cr YSGG laser significantly improved the CS of de-bonded ceramic specimens. However, it did not show a positive influence on the bond integrity of re-bonded ceramics in comparison to conventional surface treatment regimes.

中文翻译：

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重新粘合、表面处理和 Er Cr YSGG 激光处理的二硅酸锂陶瓷的粘合完整性和抗压强度

目的 本研究的目的是研究 Er Cr YSGG 激光 (ECL) 处理的再粘合二硅酸锂 (LD) 陶瓷与标准常规调理（氢氟酸）相比的剪切粘合强度 (SBS) 和抗压强度 (CS) (HFA) 和硅烷)。方法 一百个 LD 陶瓷盘被平均分配用于 SBS 和 CS 测试。80 个样品经过常规表面处理并粘合到树脂水泥上，然后对水泥堆积物进行脱粘。基于再粘合表面处理（HFA、底漆、粘合剂和 ECL），所有去粘合试样分为四组。对 40 个 SBS 测试（通用试验机）试样进行了树脂水泥堆积；然而，剩下的 40 个样本进行了 CS 测试。10 个样品分别用作 SBS 和 CS 评估的对照（表面处理一次，没有初级树脂水泥粘合）。使用扫描电子显微镜评估表面形貌。结果 最大和最小 SBS 值按组显示：对照组（33.42 ± 3.28 兆帕（MPa））；和 ECL (17.50 ± 2.22 MPa)。ECL 组 (439.45 ± 70.68 MPa) 和对照组 (237.28 ± 19.96 MPa) 的样本分别显示最大和最小 CSs。对于 ECL 标本，与对照标本相比，SBS 显着降低，CS 显着升高。结论 Er Cr YSGG 激光的应用显着提高了脱粘陶瓷样品的 CS。然而，