Department of Restorative Dentistry, Division of Operative Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Department of Restorative Dental Science, Division of Endodontics, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Photodiagnosis Photodyn Ther. 2021 Mar;33:102159. doi: 10.1016/j.pdpdt.2020.102159. Epub 2020 Dec 26.
The aim of present ex-vivo study was to assess and evaluate the influence of alternative dentinal conditioning methods- Er,Cr:YSGG (ECL) and Photodynamic therapy (PDT) in comparison to traditional etching regimes- Self Etch Resin (SER) and total etch and rinse (TER) on the bond values of Bioactive restorative material (BA) and Multicore (MC) bulk filled resin composite restorations.
Eighty caries free mandibular molars were disinfected and embedded in acrylic resin up to Cemento enamel junction (CEJ). Buccal surfaces of all samples were grounded to depth of 2 mm. Specimens were divided into eight groups (n = 20) based on surface treatment received. Samples in group 1 and 2 conditioned with ECYL, group 3 and 4 pre-treated with methylene blue photosensitizer (MBP), group 5 and 6 surfaces conditioned with TER and samples in group 7 and 8 conditioned with SER. Dentin bonding agent was applied and samples of group 1, 3, 5 and 7 were bonded with BA and 2,4,6,8 bonded to MC. Samples were placed in universal testing machine for SBS testing. Data was assessed using analysis of variance (ANOVA) and Tukey multiple comparisons test.
Specimens in group 6 treated with TER and bonded with MC demonstrated maximum SBS (19.61 ± 0.587 MPa). Whereas, group 3 dentin conditioned to MBP and bonded to BA displayed lowest bond values (12.01 ± 0.892 MPa). Samples in group 3 and group 4 dentin treated with MBP bonded to MC (13.68 ± 0.221 MPa) and BA (12.01 ± 0.892 MPa) displayed comparable bond integrity (p > 0.05) CONCLUSION: Dentin pre-treated with TER still remains the gold standard. ECYL as an alternative approach to condition dentin has shown potential and can be recommended in clinical settings. MC as bulk fill composite is recommended over BA irrespective of dentine conditioning technique. MBP as dentin conditioner needs further investigation.
本离体研究旨在评估和比较替代牙本质处理方法-Er,Cr:YSGG（ECL）和光动力疗法（PDT）与传统酸蚀处理方法-自酸蚀树脂（SER）和全酸蚀-冲洗（TER）对生物活性修复材料（BA）和多管（MC）块状填充树脂复合材料修复体的粘结值的影响。
将 80 颗无龋下颌磨牙消毒并嵌入丙烯酸树脂中，直至牙釉质牙骨质界（CEJ）。所有样本的颊面均磨至 2mm 深度。根据所接受的表面处理，将样本分为 8 组（n=20）。第 1 组和第 2 组用 ECL 处理，第 3 组和第 4 组用亚甲蓝光敏剂（MBP）预处理，第 5 组和第 6 组用 TER 处理，第 7 组和第 8 组用 SER 处理。然后应用牙本质粘结剂，第 1 组、第 3 组、第 5 组和第 7 组用 BA 粘结，第 2 组、第 4 组、第 6 组和第 8 组用 MC 粘结。将样本放入万能试验机进行 SBS 测试。使用方差分析（ANOVA）和 Tukey 多重比较检验对数据进行评估。
用 TER 处理并用 MC 粘结的第 6 组样本显示出最大的 SBS（19.61±0.587MPa）。而用 MBP 处理牙本质并用 BA 粘结的第 3 组样本显示出最低的粘结值（12.01±0.892MPa）。第 3 组和第 4 组用 MBP 预处理并用 MC（13.68±0.221MPa）和 BA（12.01±0.892MPa）粘结的样本显示出相似的粘结完整性（p＞0.05）。
用 TER 预处理的牙本质仍然是金标准。ECL 作为一种替代牙本质处理方法显示出了潜力，可以在临床环境中推荐使用。MC 作为块状填充复合材料，无论牙本质处理技术如何，都优于 BA。MBP 作为牙本质处理剂需要进一步研究。
