State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, School of Stomatology, the Fourth Military Medical University, Xi'an, China.
State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of VIP Dental Care, and School of Stomatology, the Fourth Military Medical University, Xi'an, China.
Photobiomodul Photomed Laser Surg. 2023 Jun;41(6):291-296. doi: 10.1089/photob.2022.0096.
This study aimed to evaluate the effectiveness of photon-induced photoacoustic streaming (PIPS), XP-endo Finisher (XPF), and passive ultrasonic irrigation (PUI) for the removal of root canal filling materials from oval root canals. Various adjunctive irrigation techniques following mechanical preparation have been applied to enhance removal of fillings during root canal retreatment. However, whether there is superiority of one approach over others remains controversial. Thirty extracted single-rooted teeth with oval-shaped canals were instrumented with the ProTaper Next (PTN) system and obturated with the warm vertical compaction technique. After storage at 37°C for 1 month, retreatment was performed with the PTN system up to size X4. The teeth were then randomly assigned into three groups ( = 10) that were, respectively, subjected to supplementary irrigation with different protocols: PIPS, PUI, and XPF, followed by measurement of filling material volumes using high-resolution micro-computed tomography. The PTN preparation resulted in significant reductions in residual filling materials ( < 0.05), whereas PIPS, PUI, and XPF moderately improved the removal of the remnants ( > 0.05). The residual filling materials after supplementary irrigation ranged from 0.384 ± 0.181 to 0.421 ± 0.143 mm in oval canals. There was no significant difference in the effectiveness among the PIPS, PUI, and XPF approaches ( > 0.05). Mechanical preparations are useful for removing most root fillings during retreatment in oval-shaped canals. PIPS can reduce residual root-filling materials to the similar extent as PUI and XPF.
本研究旨在评估光子诱导光声流（PIPS）、XP-endo Finisher（XPF）和被动超声冲洗（PUI）在从椭圆形根管中去除根管充填材料方面的有效性。在根管再治疗中，已经应用了各种辅助冲洗技术来增强对填充物的去除。然而，一种方法是否优于其他方法仍存在争议。
将 30 颗具有椭圆形根管的离体单根牙用 ProTaper Next（PTN）系统进行器械预备并用热垂直加压技术进行根管充填。在 37°C 下储存 1 个月后，用 PTN 系统进行再治疗，直至达到 X4 号。然后将牙齿随机分为三组（每组 10 颗），分别采用不同的方案进行辅助冲洗：PIPS、PUI 和 XPF，然后使用高分辨率微计算机断层扫描测量充填材料的体积。PTN 预备显著减少了残留的充填材料（<0.05），而 PIPS、PUI 和 XPF 则适度改善了残留物的去除（>0.05）。在补充冲洗后，椭圆形根管中的残留充填材料量范围为 0.384±0.181 至 0.421±0.143mm。PIPS、PUI 和 XPF 方法之间的有效性没有显著差异（>0.05）。机械预备在椭圆形根管的再治疗中有助于去除大部分根管充填物。PIPS 可以将残留的根管充填材料减少到与 PUI 和 XPF 相似的程度。
