Moura-Netto Cacio, Pinto Tiago, Davidowicz Harry, de Moura Abilio Albuquerque Maranhão
Department of Endodontics, University of São Paulo, São Paulo, Brazil.
Photomed Laser Surg. 2009 Dec;27(6):891-4. doi: 10.1089/pho.2008.2308.
To evaluate the influence of 810-nm-diode laser irradiation, applied before root canal filling, on apical sealing ability of three different resin-based sealers (AH Plus, EndoRez, and RealSeal).
Lasers have been widely used in endodontics. The dentin wall changes caused by laser irradiation could improve the sealing ability of endodontic cements.
Sixty single-rooted human teeth were divided into six groups, according to the endodontic sealer used and previous 810-nm-diode laser irradiation. The protocol for laser irradiation was 2.5 W in a continuous wave, in scanning mode, with four irradiations per tooth. After sample preparation, they were analyzed according to apical leakage with silver nitrate impregnation.
The RealSeal sealer achieved minimum leakage rates (1.24 mm), with significant differences at the 1% level (Tukey's test, p<0.01) from AH Plus (1.84 mm) in nonirradiated groups. When the laser was used, there were also significant differences at the 5% level (p<0.05) between irradiated groups (1.31 and 1.78 mm, respectively).
The 810-nm-diode laser irradiation did not promote significant differences in apical leakage.
评估在根管充填前应用810纳米二极管激光照射对三种不同树脂类封闭剂（AH Plus、EndoRez和RealSeal）根尖封闭能力的影响。
激光已在牙髓病学中广泛应用。激光照射引起的牙本质壁变化可提高牙髓黏固剂的封闭能力。
根据所使用的牙髓封闭剂和先前的810纳米二极管激光照射情况，将60颗单根人牙分为六组。激光照射方案为连续波2.5瓦，扫描模式，每颗牙照射四次。样本制备后，采用硝酸银浸渍法根据根尖渗漏情况进行分析。
在未照射组中，RealSeal封闭剂的渗漏率最低（1.24毫米），与AH Plus（1.84毫米）相比，在1%水平上有显著差异（Tukey检验，p<0.01）。使用激光时，照射组之间在5%水平上也有显著差异（分别为1.31和1.78毫米，p<0.05）。
810纳米二极管激光照射在根尖渗漏方面未产生显著差异。
