de Souza Fabrício Dias, Pécora Jesus Djalma, Silva Ricardo Gariba
University of São Paulo Faculty of Dentistry, Ribeirão Preto, Brazil.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2005 Jan;99(1):125-8. doi: 10.1016/j.tripleo.2004.06.066.
To evaluate coronal microleakage in filled root canals that received different biomechanical preparations and application of liquid adhesives over the root filling and the pulp chamber walls.
Root canals of 94 extracted canine teeth were filled after being biomechanically prepared with 1% sodium hypochlorite and divided into 3 groups. In 2 groups attempts were made to remove the smear layer with either 17% EDTA or Er:YAG laser irradiation (10 Hz, 250 mJ input, 112 mJ output). Liquid adhesive (Super Bonder and Single Bond adhesive) was applied and the teeth were immersed for 90 days in India ink.
Statistically significant differences were found for the different preparations, the use of liquid adhesives, and the different liquid adhesives. The use of Er:YAG laser, EDTA, and the liquid adhesive reduced coronal microleakage (P < .01).
Because of the risk of coronal microleakage, endodontically treated teeth should be restored as quickly as possible.
评估接受不同生物力学预备并在根管充填物及髓室壁上应用液体黏结剂的根管内充填后的冠部微渗漏情况。
94颗拔除的犬牙根管先用1%次氯酸钠进行生物力学预备，然后充填，并分为3组。在2组中，分别尝试用17%乙二胺四乙酸（EDTA）或铒钇铝石榴石（Er:YAG）激光照射（10赫兹，250毫焦输入，112毫焦输出）去除玷污层。应用液体黏结剂（强力黏合剂和单组分黏合剂），并将牙齿浸泡在印度墨水中90天。
在不同预备方法、液体黏结剂的使用以及不同液体黏结剂之间发现了具有统计学意义的差异。使用Er:YAG激光、EDTA和液体黏结剂可减少冠部微渗漏（P < 0.01）。
由于存在冠部微渗漏的风险，根管治疗后的牙齿应尽快修复。
