Department of Restorative Dental Science, Division of Endodontics, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Department Of Operative Dentistry, Dow International Dental College, Karachi, Pakistan.
Photodiagnosis Photodyn Ther. 2021 Jun;34:102341. doi: 10.1016/j.pdpdt.2021.102341. Epub 2021 May 13.
The aim was to compare Photodynamic therapy (PDT) as an adjunct to NaOCl and EDTA on the extrusion bond strength (EBS) of AH Plus (AH), Sealapex (SA) and MTA Fillapex (MF) root canal sealers.
Root canal treatment for human teeth (n = 60) using protaper universal system was performed followed by irrigation with NaOCl/ EDTA. Samples were divided (n = 30) based on disinfection technique, NaOCl/EDTA and NaOCl/EDTA with PDT (Curcumin-PS-CP) as an adjunct. Specimens were divided in three subgroups (n = 10) based on sealers used (Gp 1-Na-E-AH, Gp 2-Na-E-PDT-AH, Gp 3-Na-E-SA, Gp 4-Na-E-PDT-SA, Gp 5-Na-E-MF & Gp 6-Na-E-PDT-MF). Canals were dried and obturated followed by sectioning at coronal and middle third. EBS testing was performed using a universal testing machine (UTM) and modes of failure were assessed. Analysis of variance (ANOVA) and Tukey multiple comparison tests were used to compare the means of EBS. (p < 0.05).
Sealers showed a significant influence on EBS, as Gp 1 (Co: 9.21 ± 0.62, Mid: 8.54 ± 0.55) and Gp 2 (Co: 7.11 ± 0.68, Mid: 7.30 ± 0.37) showed higher EBS than Gp 3 (Co: 5.21 ± 0.63, Mid: 4.36 ± 0.83) and Gp 4 (Co: 5.39 ± 0.72, Mid: 4.46 ± 0.74). Gp 5 (Co: 9.04 ± 0.13, Mid: 8.14 ± 0.91) and Gp 6 (Co: 8.67 ± 0.42, Mid: 8.07 ± 0.07) exhibited higher EBS than Gp 3 and Gp 4 specimens. Adjunctive use of PDT for AH sealer (Gp 2) showed decreased EBS compared to Gp 1 specimens. EBS remained comparable for both MTA-Fillapex and Sealapex with and without PDT.
AH Plus (Gp 1 and 2) and MTA-Fillapex (Gp 5 and 6) sealers displayed better EBS compared to Sealapex (Group 3 and 4). Adjunctive Application of PDT (CP) did not show a significant improvement in bond strength of sealers to root dentin.
比较光动力疗法（PDT）作为附加物联合 NaOCl 和 EDTA 对 AH Plus（AH）、Sealapex（SA）和 MTA Fillapex（MF）根管封闭剂的挤出粘结强度（EBS）的影响。
使用 Protaper 通用系统对人牙进行根管治疗（n = 60），然后用 NaOCl/EDTA 冲洗。根据消毒技术、NaOCl/EDTA 和 NaOCl/EDTA 联合 PDT（姜黄素-PS-CP）作为附加物将样本分为（n = 30）。根据使用的封闭剂将样本分为三组（n = 10）（Gp 1-Na-E-AH、Gp 2-Na-E-PDT-AH、Gp 3-Na-E-SA、Gp 4-Na-E-PDT-SA、Gp 5-Na-E-MF 和 Gp 6-Na-E-PDT-MF）。根管干燥并封闭后，在冠部和中部进行切割。使用万能试验机（UTM）进行 EBS 测试，并评估失效模式。使用方差分析（ANOVA）和 Tukey 多重比较检验来比较 EBS 的平均值。（p < 0.05）。
封闭剂对 EBS 有显著影响，Gp 1（Co：9.21 ± 0.62，Mid：8.54 ± 0.55）和 Gp 2（Co：7.11 ± 0.68，Mid：7.30 ± 0.37）的 EBS 高于 Gp 3（Co：5.21 ± 0.63，Mid：4.36 ± 0.83）和 Gp 4（Co：5.39 ± 0.72，Mid：4.46 ± 0.74）。Gp 5（Co：9.04 ± 0.13，Mid：8.14 ± 0.91）和 Gp 6（Co：8.67 ± 0.42，Mid：8.07 ± 0.07）的 EBS 高于 Gp 3 和 Gp 4 标本。AH 封闭剂（Gp 2）附加 PDT 的使用与 Gp 1 标本相比，EBS 降低。MTA-Fillapex 和 Sealapex 无论是否使用 PDT，其 EBS 均相当。
与 Sealapex（第 3 组和第 4 组）相比，AH Plus（第 1 组和第 2 组）和 MTA-Fillapex（第 5 组和第 6 组）封闭剂的 EBS 更好。PDT（CP）的附加应用并未显示对封闭剂与根管牙本质粘结强度的显著改善。
