Restorative Dental Sciences Department, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Dental Practioner Private Practice, Riyadh Saudi Arabia.
Photodiagnosis Photodyn Ther. 2022 Jun;38:102792. doi: 10.1016/j.pdpdt.2022.102792. Epub 2022 Mar 5.
The present study aimed to assess the influence of methylene blue (MBP), Riboflavin, and indocyanine green (ICG) on the bond strength of caries affected dentin (CAD) when bonded to resin-modified glass ionomer cement (RMGIC).
Human third molars with caries lesions were isolated and collected scrutinized based on ICDAS criteria. The teeth were cleaned using a periodontal scaler and disinfected. All samples were positioned in polyvinyl up to the cementoenamel junction. The samples were randomly distributed into five groups based on the pretreatment regime. Samples in group 1, were pretreated with MBP; group 2, polyacrylic acid (PAA) group 3, ICG, group 4, Riboflavin photosensitizer, and group 5, 37% phosphoric acid (PA). All samples were bonded with RMGIC. 10 samples were subjected to the universal testing machine for shear bond strength (SBS) testing. Five samples from each group were placed in fuchsine dye for the microleakage assessment. Comparison of means and standard deviations (SD) of SBS and microleakage in investigated groups was performed using analysis of variance (ANOVA) and Tukey's post hoc test at a significance level (p = 0.05) RESULTS: The highest micro shear bond values were observed in group 2 (CAD conditioned with PAA) (14.26±1.67 MPa). Whereas, the lowest bond values were found in group 1 (treated with MBP) (8.82±1.08 MPa). CAD conditioned with different photosensitizers i.e., MBP, ICG, and Riboflavin before bonding to RMGIC displayed comparable bond values (8.82±1.08 MPa), (9.47±0.21 MPa), and (11.23±0.47 MPa) respectively (p>0.05). Samples conditioned with 37% PA showed significantly higher microleakage scores compared to other surface-treated groups (p<0.05).
Caries-affected dentin conditioned with polyacrylic acid demonstrated low microleakage and high bond strength.
本研究旨在评估亚甲蓝（MBP）、核黄素和吲哚菁绿（ICG）对黏结于树脂改良型玻璃离子水门汀（RMGIC）的龋损牙本质（CAD）的黏结强度的影响。
从患有龋病的第三磨牙中分离并收集符合 ICDAS 标准的牙齿。使用牙周刮治器清洁牙齿并进行消毒。所有样本均置于聚氯乙烯中直至牙釉牙骨质界。根据预处理方案，将样本随机分为五组。第 1 组样本用 MBP 预处理；第 2 组用聚丙烯酸（PAA）处理；第 3 组用 ICG 处理；第 4 组用核黄素光敏剂处理；第 5 组用 37%磷酸（PA）处理。所有样本均用 RMGIC 黏结。将 10 个样本置于万能试验机上进行剪切黏结强度（SBS）测试。每组取 5 个样本置于品红染料中进行微渗漏评估。使用方差分析（ANOVA）和 Tukey 事后检验对研究组的 SBS 和微渗漏均值和标准差（SD）进行比较，显著性水平为 p=0.05。
第 2 组（用 PAA 处理的 CAD）的微剪切黏结值最高（14.26±1.67 MPa）。而第 1 组（用 MBP 处理）的黏结值最低（8.82±1.08 MPa）。在黏结 RMGIC 之前用不同光敏剂处理的 CAD，即 MBP、ICG 和核黄素，其黏结值相当（8.82±1.08 MPa）、（9.47±0.21 MPa）和（11.23±0.47 MPa）（p>0.05）。用 37%PA 处理的样本显示出比其他表面处理组更高的微渗漏评分（p<0.05）。
用聚丙烯酸处理的龋损牙本质表现出低微渗漏和高黏结强度。
