Hashem Mohamed, El-Hejazi Ahmed A, Niaz Muhammad Omar, Alsadon Omar, Alolayani Bader M, Fouad H
Dental Health Department, College of Applied Medical Sciences, King Saud University, P.O Box 10219, Riyadh, 11433, Saudi Arabia.
Operative and Esthetic Dentistry, College of Dentistry, King Saud University, Saudi Arabia.
Photodiagnosis Photodyn Ther. 2020 Jun;30:101733. doi: 10.1016/j.pdpdt.2020.101733. Epub 2020 Apr 23.
The aim of the present study was to establish an assessment regarding the efficacy of final disinfection protocols and sealers on the bond strength (BS) of root canal (RC) filling materials on root dentin which has already been treated with photobiomodulation (PBT) or photodynamic therapy (PBT) respectively.
One-hundred and twenty root canals were included in the present study. The selected teeth were cleaned and shaped to accept the obturation. The prepared specimens were subjected to laser therapy (PBT and PDT) and were randomized into three groups (n = 20/group) on the basis of irrigation technique: Group 1: distilled water (DW) + ultrasonic irrigation (UI); Group 2: 17 % EDTA; Group 3: 0.2 % Chlorhexidine digluconate (CHx) respectively. Each specific group was further divided into two subgroups (n = 10), based on endodontic sealing agent incorporated during obturation: AH Plus or MTA Fillapex. The push-out test was used to gauge the BS, whereas the evaluation was done with the help of two-way ANOVA which was followed by a subsequent Tukey post-hoc test. The chi-square test was used to calculate the mode of failure in the selected specimens (α = 5%).
The final irrigation protocols of 17 % EDTA and CHX helped to enhance the BS of RC filling material with either sealer agent used (p < 0.05), whereas, AH Plus reported an increase in the values of BS as compared to its counterpart, MTA Fillapex (p < 0.05). Increased values of cohesive failure were associated with all the groups, irrespective of the tested final irrigation protocols and RC sealer agents (p < 0.05). There was no significant difference between the laser therapies among all the groups (p < 0.05).
The use of 17 % EDTA and CHX and sealing material AH Plus increased the BS of the obturation on radicular dentin previously subjected to either of the mentioned laser therapies. Furthermore, no significant effect on the BS was observed with the use of lasers in the study.
本研究的目的是对根管（RC）充填材料与已分别接受光生物调节（PBT）或光动力疗法（PDT）治疗的牙根牙本质之间的粘结强度（BS），建立关于最终消毒方案和封闭剂疗效的评估。
本研究纳入了120个根管。将所选牙齿进行清洁和预备以接受充填。对制备好的标本进行激光治疗（PBT和PDT），并根据冲洗技术随机分为三组（每组n = 20）：第1组：蒸馏水（DW）+超声冲洗（UI）；第2组：17%乙二胺四乙酸（EDTA）；第3组：0.2%葡萄糖酸洗必泰（CHx）。根据充填时使用的根管封闭剂，每个特定组进一步分为两个亚组（每组n = 10）：AH Plus或MTA Fillapex。采用推出试验来测量粘结强度，而评估借助双向方差分析进行，随后进行Tukey事后检验。采用卡方检验计算所选标本的失败模式（α = 5%）。
17% EDTA和CHX的最终冲洗方案有助于提高使用任何一种封闭剂时RC充填材料的粘结强度（p < 0.05），而与MTA Fillapex相比，AH Plus的粘结强度值有所增加（p < 0.05）。无论测试的最终冲洗方案和RC封闭剂如何，所有组的内聚性失败值均增加（p < 0.05）。所有组之间的激光治疗无显著差异（p < 0.05）。
使用17% EDTA和CHX以及封闭材料AH Plus可提高先前接受上述任何一种激光治疗的牙根牙本质上充填物的粘结强度。此外，本研究中使用激光对粘结强度未观察到显著影响。
