Department of Prosthodontics, Faculty of Dentistry, Erzincan Binali Yıldırım University, Erzincan, Turkey.
Department of Prosthodontics, Faculty of Dentistry, Akdeniz University, Antalya, Turkey.
Photobiomodul Photomed Laser Surg. 2023 Sep;41(9):501-508. doi: 10.1089/photob.2022.0154. Epub 2023 Aug 31.
This study aimed to investigate the effects of laser irradiation applied to zirconia and tooth surfaces on shear bond strength (SBS) compared with acid etching and sandblasting. The effect of laser irradiation on the bond strength between zirconia and adhesives is a controversial issue for dentin surface treatments. In addition, the effects of different combinations of surface treatments to increase adhesion on both the zirconia and dentin surfaces remain unclear. A total of 90 tooth samples were assigned into groups according to various pretreatments: control group was left untreated, acid etching, and Erbium, Chromium:Yttrium Scandium Gallium Garnet (Er,Cr:YSGG) laser irradiation group (15 Hz, 2 W). In addition, the zirconia specimens were separated into three groups ( = 10) according to the different surface treatments performed: sandblasting (120 μm AlO), Er,Cr:YSGG laser (15 Hz, 2 W), and as untreated surface. The zirconia samples were cemented to the dentin surface using dual-cure resin cement and subjected to an SBS test at a speed of 0.5 mm/min under a universal testing machine until fractures occurred in the bonding surface. The highest SBS values were observed in Group tooth acid (TA)-zirconia Er,Cr:YSGG laser (ZL), followed by Group tooth Er,Cr:YSGG laser (TL)-zirconia sandblasting (ZS) and Group TA-zirconia control (ZC). The lowest SBS values were found in Group TA-ZS. Significant intergroup difference was noted between Group TA-ZL, Group tooth control (TC)-ZC, Group TL-ZS, and Group TC-ZC. However, no significant difference was noted between Group TA-ZL, Group TL-ZS, and Group TA-ZC. Acid etching and laser treatments applied to the dentin and zirconia surfaces were found to be effective techniques for improving the zirconia-dentin bond, respectively. Clinical Trial Registration number: 33216249-604.01.02-E.24308.
本研究旨在探讨与酸蚀和喷砂相比，激光照射应用于氧化锆和牙面时对剪切结合强度（SBS）的影响。激光照射对牙本质表面处理后氧化锆和粘结剂之间粘结强度的影响是一个有争议的问题。此外，不同表面处理组合对提高氧化锆和牙本质表面粘结力的效果尚不清楚。
总共 90 个牙样本根据不同的预处理分为几组：对照组未处理，酸蚀组和铒铬：钇钪石榴石（Er，Cr：YSGG）激光照射组（15 Hz，2 W）。此外，根据不同的表面处理方法，将氧化锆样本分为三组（n = 10）：喷砂（120μm AlO），铒铬：钇钪石榴石激光（15 Hz，2 W）和未处理表面。使用双固化树脂粘结剂将氧化锆样本粘结到牙本质表面上，并在万能试验机上以 0.5 mm/min 的速度进行 SBS 测试，直到粘结面发生断裂。
SBS 值最高的是牙酸（TA）-氧化锆铒铬：钇钪石榴石激光（ZL）组，其次是牙铒铬：钇钪石榴石激光（TL）-氧化锆喷砂（ZS）组和 TA-氧化锆对照组（ZC）。TA-ZS 组的 SBS 值最低。TA-ZL 组、牙对照组（TC）-ZC 组、TL-ZS 组和 TC-ZC 组之间存在显著的组间差异。但是，TA-ZL 组、TL-ZS 组和 TA-ZC 组之间没有显著差异。
酸蚀和激光处理应用于牙本质和氧化锆表面被发现是提高氧化锆-牙本质粘结的有效技术。临床试验注册号：33216249-604.01.02-E.24308。
