Trierveiler Paiva Rafaela Cristina, Solda Caroline, Vendramini Felipe, Vanni José Roberto, Baldissarelli Marcon Flávia, João Fornari Volmir, Martins Hartmann Mateus Silveira
Board Certified in Endodontics by Centro de Estudos Odontológicos Meridional , Passo Fundo, RS, Brazil.
Department of Endodontics at Centro de Estudos Odontológicos Meridional, Passo Fundo, RS, Brazil.
Iran Endod J. 2018 Summer;13(3):351-355. doi: 10.22037/iej.v13i3.18020.
Different techniques have been proposed to help achieving apical patency during endodontic treatment and retreatment. The objective of this study was to compare reestablishment of apical patency in teeth previously subjected to root canal treatment using manual and reciprocating instruments.
A total of 40 single-rooted extracted human mandibular incisors were selected and prepared using the Hero 642 sequence to 45/0.02 and obturated using Tagger's hybrid technique to 1 mm short of the apex. Teeth were divided into two groups according to the type of instrument used to regain patency: group 1, hand K-files and group 2, reciprocating WaveOne Primary files (25/0.08). Fisher's exact test was used in the statistical analysis. In group1, apical patency was regained in 9 of the 20 teeth tested (46%), compared to 20 teeth (100%) in group 2. The difference between the groups was significant (<0.0001).
Our study shows that reciprocating instrumentation is more successful in regaining apical patency in single-rooted, previously treated teeth.
在牙髓治疗和再治疗过程中，人们提出了不同的技术来帮助实现根尖通畅。本研究的目的是比较使用手动器械和往复式器械在先前接受过根管治疗的牙齿中重新建立根尖通畅的情况。
总共选择40颗拔除的单根人下颌切牙，使用Hero 642序列预备至45/0.02，并使用Tagger混合技术充填至距根尖1mm处。根据用于恢复通畅的器械类型将牙齿分为两组：第1组，手动K锉；第2组，往复式WaveOne Primary锉（25/0.08）。统计分析采用Fisher精确检验。在第1组中，测试的20颗牙齿中有9颗（46%）恢复了根尖通畅，而第2组为20颗（100%）。两组之间的差异具有统计学意义（<0.0001）。
我们的研究表明，在单根、先前治疗过的牙齿中，往复式器械在恢复根尖通畅方面更成功。
