Department of Endodontics, Faculty of Dentistry, Van Yüzüncü Yıl University, Van, Turkey.
Department of Endodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong.
Eur Endod J. 2020 Dec;5(3):264-270. doi: 10.14744/eej.2020.92905.
To investigate the influence of sonic agitation or laser-activated irrigation techniques on the removal chlorhexidine (CHX) and modified triple antibiotic paste (mTAP) on the sealer penetration depth and dislocation resistance of Guttaflow Bioseal.
Single-rooted mandibular premolars (n=96) were prepared with rotary nickel titanium instruments and randomly divided into two groups (n=48) based on the intracanal medicaments used: Group 1, mTAP; Group 2, CHX gel. After 7 days, the specimens in each group were divided into three subgroups (n=16) based on the supplementary irrigation technique used to remove the medicaments: laser activated irrigation (Er, Cr: YSGG laser, Waterlase MD, Biolase Technology Inc., San Clemente, CA, USA), sonic agitation (EndoActivator, Dentslpy Sirona Endodontics, PA, USA) and syringe-and-needle irrigation (control) techniques. Canals were filled with single matched-taper gutta-percha cone and a calcium silicate-based sealer (GuttaFlow® Bioseal, Coltène/Whaledent, Langenau, Germany). At the end of three weeks, sealer penetration was investigated using confocal microscopy (n=6), and dislocation resistance was calculated by measuring the push-out bond strength (n=10). Statistical analysis was performed using three-way analysis of variance (ANOVA) and Tukey post-hoc test (P=0.05).
Laser activated irrigation resulted in significantly higher depth of sealer penetration compared to sonic agitation and syringe irrigation (P<0.01). The average sealer penetration depths were recorded as 846.6 µm, 786.5 µm and 505 µm in the Er,Cr: YSGG laser, EndoActivator and control groups, respectively. The mean bond strength obtained in group 3 (syringe-and-needle irrigation) was significantly less than the other groups (P<0.05). The mean values were 9.08 in the Er,Cr: YSGG laser group, 8.44 in the EndoActivator group and 5.08 in the needle group.
Er,Cr;YSGG laser irrigation to remove the medicaments was advantageous to other irrigation techniques in sealer penetration and dislocation resistance of the sealer.
研究超声震荡或激光激活冲洗技术对 Guttaflow Bioseal 封闭剂的渗透深度和脱位阻力的影响，以及对洗必泰（CHX）和改良三联抗生素糊剂（mTAP）的去除效果。
将 96 颗下颌前磨牙随机分为两组（n=48），根据根管内使用的药物进行分组：第 1 组，mTAP；第 2 组，CHX 凝胶。7 天后，每组样本根据补充冲洗技术的不同进一步分为 3 个亚组（n=16）：激光激活冲洗（Er,Cr: YSGG 激光，Waterlase MD，Biolase Technology Inc.，San Clemente，CA，USA）、超声震荡（EndoActivator，Dentsply Sirona Endodontics，PA，USA）和注射器-针头冲洗（对照组）技术。采用同种锥形牙胶尖和钙硅酸钠基封闭剂（GuttaFlow® Bioseal，Coltène/Whaledent，Langenaau，Germany）进行根管充填。3 周后，使用共聚焦显微镜观察封闭剂的渗透深度（n=6），通过测量推出粘结强度计算脱位阻力（n=10）。采用三因素方差分析（ANOVA）和 Tukey 事后检验（P=0.05）进行统计学分析。
激光激活冲洗组的封闭剂渗透深度显著高于超声震荡组和注射器冲洗组（P<0.01）。Er,Cr: YSGG 激光组、EndoActivator 组和对照组的平均封闭剂渗透深度分别为 846.6 µm、786.5 µm 和 505 µm。第 3 组（注射器-针头冲洗）的粘结强度显著低于其他组（P<0.05）。Er,Cr: YSGG 激光组的平均粘结强度为 9.08，EndoActivator 组为 8.44，针头组为 5.08。
与其他冲洗技术相比，Er,Cr: YSGG 激光冲洗在封闭剂的渗透和封闭剂的脱位阻力方面具有优势。
