Department of Restorative Dental Sciences, College of Dentistry, King Saud University, P. O. Box 60169, Riyadh 11545, Saudi Arabia; Engr. Abdullah Bugshan research chair for Dental and Oral Rehabilitation, King Saud University, Riyadh 11545, Saudi Arabia.
Photodiagnosis Photodyn Ther. 2021 Dec;36:102512. doi: 10.1016/j.pdpdt.2021.102512. Epub 2021 Sep 3.
The study aimed to determine the influence of Er, Cr: YSGG (ECL), methylene blue photosensitizer (MBP), and curcumin photosensitizer (CP) disinfection on CAD and its bond strength and microleakage to bioactive (BA) and multicore (MC) bulk-fill composite.
Sixty carious mandibular molars were collected based on the criteria of ICDAS Code 6 (International Caries Detection and Assessment system). Specimens were embedded in polyvinyl pipes up to CEJ and subjected to preparation of standard class II cavity leaving CAD in situ for bonding. All samples were randomly assigned to eight groups based on disinfection regimes and type of bulk-fill material. Samples in group 5 and 6 didn't undergo any disinfection; group 1: ECL + BA, group 2: ECL+ MC; group 3 MBP + BA, group 4: MBP + MC; group 5: Conventional Etch and Rinse + BA (Control), group 6 Conventional Etch and Rinse + MC (Control); group 7: CP +BA and group 8 CP+MC. Specimens were tested for SBS using a universal testing machine and the debonded surfaces were evaluated under a stereomicroscope to determine modes of failure. A dye penetration test was performed for microleakage assessment. For intergroup comparison test analysis of variance (ANOVA) was performed using means and standard deviation from each group. Tukey HSD was used for multiple group comparison tests. The level of significance was established at p < 0.05.
The maximum mean bond strength was shown by group 6 (18.96 ± 0.31 MPa) conventional etch and rinse+ MC (control). Whereas, the minimum SBS was recorded in specimens of group 7 CP +BA (13.04 ± 0.81 MPa). SBS values among group 3 (14.05 ± 0.10 MPa- MBP+BA), group 4 (13.66 ± 0.39- MBP+MC) group 7 (13.04 ± 0.81 MPa- CP +BA and group 8 (14.21 ± 0.59 MPa- CP+MC) were found to be comparable (p>0.05). There was no statistically significant difference among the study groups concerning microleakage (p >0.05).
CAD treated with ECL for the adhesive bonding of BA and conventional bulk-fill composite MC has shown potential to be used clinically. Moreover, MBP and CP for conditioning of CAD need further investigation.
本研究旨在探讨 Er,Cr:YSGG（ECL）、亚甲蓝光敏剂（MBP）和姜黄素光敏剂（CP）消毒对 CAD 及其与生物活性（BA）和多芯（MC）块状填充复合材料的粘结强度和微渗漏的影响。
根据 ICDAS 代码 6（国际龋齿检测和评估系统）的标准，从 60 颗下颌磨牙中收集龋齿样本。将样本嵌入聚氯乙烯管中直至 CEJ，并进行标准 II 类洞制备，保留原位 CAD 进行粘结。所有样本均根据消毒方案和块状填充材料类型随机分为 8 组。第 5 组和第 6 组未进行任何消毒；第 1 组：ECL+BA，第 2 组：ECL+MC；第 3 组：MBP+BA，第 4 组：MBP+MC；第 5 组：常规酸蚀冲洗+BA（对照），第 6 组：常规酸蚀冲洗+MC（对照）；第 7 组：CP+BA，第 8 组：CP+MC。使用万能试验机测试样本的 SBS 值，并在立体显微镜下评估离解表面以确定失效模式。进行染料渗透试验以评估微渗漏。采用方差分析（ANOVA）对组间比较进行检验，采用每组的平均值和标准差进行分析。采用 Tukey HSD 进行多组比较检验。显著性水平设为 p<0.05。
常规酸蚀冲洗+MC（对照）组 6 的最大平均粘结强度最高（18.96±0.31 MPa）。而 CP+BA 组的 SBS 值最低（13.04±0.81 MPa）。第 3 组（MBP+BA）、第 4 组（MBP+MC）、第 7 组（CP+BA）和第 8 组（CP+MC）的 SBS 值分别为 14.05±0.10 MPa、13.66±0.39 MPa、13.04±0.81 MPa 和 14.21±0.59 MPa，差异无统计学意义（p>0.05）。各组间微渗漏无统计学差异（p>0.05）。
CAD 经 ECL 处理后，可用于 BA 和常规块状填充复合材料 MC 的粘结，具有临床应用潜力。此外，CP 和 MBP 对 CAD 的处理需要进一步研究。
