Pécora J D, Cussioli A L, Guerişoli D M, Marchesan M A, Sousa-Neto M D, Brugnera Júnior A
Faculty of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
Braz Dent J. 2001;12(1):27-30.
The effect of Er:YAG laser application and EDTAC on the adhesion of epoxy resin-based endodontic sealers to human dentin was evaluated in vitro. A total of 99 extracted human maxillary molars with their crowns worn flat were used. The teeth were divided into 3 groups: group 1, the dentin surface received no treatment; group 2, EDTAC was applied to the dentin surface for 5 min; group 3, the dentin surface received Er:YAG laser application (2.25 W potency; 11 mm focal distance; 4 Hz frequency; 200 mJ energy; 62 J total energy; 313 mean impulse). Three teeth from each group were analyzed by scanning electron microscopy for changes in dentin surface. The epoxy resin root canal sealers used were: AH Plus, Topseal, Sealer 26, AH 26, and Sealer Plus. The zinc oxide eugenol-based sealer Fillcanal was used as control. Adhesion was measured with a Universal testing machine. The results showed a statistically significant difference at the level of 1% among the dentin treatments. The dentin treated with Er:YAG laser showed greater adhesion with the sealers than dentin treated with EDTAC which was greater than dentin that received no treatment. The Tukey test showed the formation of 5 groups in decreasing order of adhesion: AH Plus, Topseal and Sealer 26, AH 26, Sealer Plus, and Fillcanal (Grossman cement).
体外评估了铒钇铝石榴石（Er:YAG）激光应用和乙二胺四乙酸（EDTAC）对环氧树脂类根管封闭剂与人类牙本质黏附力的影响。总共使用了99颗上颌磨牙，其牙冠已磨平。这些牙齿被分为3组：第1组，牙本质表面未接受处理；第2组，EDTAC应用于牙本质表面5分钟；第3组，牙本质表面接受Er:YAG激光照射（功率2.25W；焦距11mm；频率4Hz；能量200mJ；总能量62J；平均脉冲313）。每组取三颗牙齿通过扫描电子显微镜分析牙本质表面的变化。所使用的环氧树脂根管封闭剂有：AH Plus、Topseal、Sealer 26、AH 26和Sealer Plus。以氧化锌丁香酚类封闭剂Fillcanal作为对照。使用万能试验机测量黏附力。结果显示，在牙本质处理组之间，1%水平上存在统计学显著差异。与接受EDTAC处理的牙本质相比，经Er:YAG激光处理的牙本质与封闭剂的黏附力更强，而接受EDTAC处理的牙本质又强于未接受处理的牙本质。Tukey检验显示，按黏附力从高到低形成了5组：AH Plus、Topseal和Sealer 26、AH 26、Sealer Plus以及Fillcanal（格罗斯曼黏固粉）。
