Wang Xiaoli, Cheng Xiaogang, Liu Baogang, Liu Xin, Yu Qing, He Wenxi
1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University , Xi'an, P.R. China .
2 Department of Stomatology, Lishilu Outpatient Department, Chinese PLA Second Artillery Corps , Beijing, P.R. China .
Photomed Laser Surg. 2017 Dec;35(12):688-694. doi: 10.1089/pho.2017.4266. Epub 2017 Apr 5.
The purpose of this study was to evaluate the effect of laser-activated irrigations (LAI) by using the Erbium: Yttrium Aluminum Garnet (Er:YAG) laser and the Erbium Chromium: Yttrium Scandium Gallium Garnet (Er,Cr:YSGG) laser on removing smear layer (SL) from the root canal wall.
LAI has been proposed as an adjuvant to conventional protocols of endodontic treatment to enhance the disinfection, which is a promising protocol for SL removal.
SL was generated by preparing the root canals of extracted human teeth to a #35/.04 M3 instrument. The SL then received treatments of one of the following: (A) NaOCl, 5.25% sodium hypochlorite (NaOCl) for 60 sec; (B) EDTA, 17% ethylenediamine tetraacetic acid (EDTA) for 60 sec; (C) NaOCl+EDTA, NaOCl, and EDTA for 30 sec each; (D) LAI+NaOCl, LAI with NaOCl for 60 sec; (E) LAI+EDTA, LAI with EDTA for 60 sec; and (F) LAI+NaOCl+EDTA, LAI with NaOCl, and EDTA for 30 sec each. Efficacies of SL removal were evaluated by using a five-grade scoring system under scanning electron microscopy.
The laser activations significantly enhanced the effect of the NaOCl, EDTA, and NaOCl+EDTA irrigations in removing SL. The efficacies of SL removal were presented in a descending order of LAI+NaOCl+EDTA, LAI+EDTA>LAI+NaOCl, NaOCl+EDTA>EDTA>NaOCl.
Among the treatments, the LAI+NaOCl+EDTA was the most effective protocol in removing SL from the entire root canal wall, which may be effective for root canal treatment.
本研究旨在评估使用铒：钇铝石榴石（Er:YAG）激光和铒铬：钇钪镓石榴石（Er,Cr:YSGG）激光进行激光活化冲洗（LAI）对去除根管壁玷污层（SL）的效果。
LAI已被提议作为传统牙髓治疗方案的辅助手段以增强消毒效果，这是一种很有前景的去除SL的方案。
通过用#35/.04 M3器械预备拔除的人牙根管来生成SL。然后SL接受以下处理之一：（A）次氯酸钠（NaOCl），5.25%次氯酸钠（NaOCl）处理60秒；（B）乙二胺四乙酸（EDTA），17%乙二胺四乙酸（EDTA）处理6秒；（C）NaOCl + EDTA，NaOCl和EDTA各处理30秒；（D）LAI + NaOCl，LAI联合NaOCl处理60秒；（E）LAI + EDTA，LAI联合EDTA处理60秒；以及（F）LAI + NaOCl + EDTA，LAI联合NaOCl和EDTA各处理30秒。在扫描电子显微镜下使用五级评分系统评估SL的去除效果。
激光活化显著增强了NaOCl、EDTA和NaOCl + EDTA冲洗去除SL的效果。SL去除效果按以下降序排列：LAI + NaOCl + EDTA、LAI + EDTA > LAI + NaOCl、NaOCl + EDTA > EDTA > NaOCl。
在这些处理中，LAI + NaOCl + EDTA是从整个根管壁去除SL最有效的方案，这可能对根管治疗有效。
