Zielinski Tracie M, Baumgartner J Craig, Marshall J Gordon
Department of Endodontology, Oregon Health & Science University, Portland, Oregon, USA.
J Endod. 2008 Mar;34(3):295-8. doi: 10.1016/j.joen.2007.12.004.
The purpose of this study was to compare the flow of GuttaFlow (Coltène/Whaledent Inc, Cuyahoga Falls, OH) and gutta-percha into lateral grooves and depressions in the apical 7 mm of the root canal system. A maxillary canine was used to fabricate a split-tooth model with depressions and lateral grooves placed in the canal walls at 1 mm, 3 mm, 5 mm, and 7 mm from the working length. The model was obturated with GuttaFlow or gutta-percha and Roth's 801 sealer (Roth International, Chicago, IL). Obturations with gutta-percha were performed by using warm vertical compaction with the System B plugger (Analytic Endodontics, Orange, CA) advanced to 5 mm, 4 mm, or 3 mm from the working length. All obturations with GuttaFlow showed extrusion of material beyond the apex. GuttaFlow completely obturated the grooves and depressions at all levels from the working length, and, at the 1-mm level, GuttaFlow flowed significantly better into grooves. GuttaFlow flowed better than gutta-percha into depressions at the 1-mm level when the System B plugger was inserted to 5 mm and 4 mm from the working length, but no significant differences were seen when the System B plugger was inserted to 3 mm from the working length. Gutta-percha flowed significantly better into grooves and depressions at the 1-mm level when the System B plugger was inserted 3 mm from the working length compared with 5 mm and 4 mm from working length.
本研究的目的是比较GuttaFlow（Coltène/Whaledent公司，俄亥俄州库亚霍加福尔斯）和牙胶向根管系统根尖7mm处侧支沟和凹陷内的充填情况。使用一颗上颌尖牙制作了一个裂牙模型，在距工作长度1mm、3mm、5mm和7mm处的根管壁上设置凹陷和侧支沟。该模型用GuttaFlow或牙胶与Roth's 801封闭剂（Roth International公司，伊利诺伊州芝加哥）进行充填。牙胶充填采用热垂直加压法，使用System B充填器（Analytic Endodontics公司，加利福尼亚州奥兰治）推进至距工作长度5mm、4mm或3mm处。所有使用GuttaFlow的充填均显示材料超出根尖。GuttaFlow完全充填了从工作长度起各水平的沟和凹陷，并且在1mm水平，GuttaFlow向沟内的充填明显更好。当System B充填器推进至距工作长度5mm和4mm处时，在1mm水平GuttaFlow向凹陷内的充填比牙胶更好，但当System B充填器推进至距工作长度3mm处时，未观察到显著差异。与推进至距工作长度5mm和4mm处相比，当System B充填器推进至距工作长度3mm处时，牙胶在1mm水平向沟和凹陷内的充填明显更好。
