Mamede-Neto Iussif, Borges Álvaro Henrique, Alencar Ana Helena Gonçalves, Duarte Marco Antonio Hungaro, Sousa Neto Manoel Damião, Estrela Carlos
Department of Stomatologic Sciences, School of Dentistry, Federal University of Goiás, Goiânia, GO, Brazil.
School of Dentistry, University of Cuiabá, Cuiabá, MT, Brazil.
Open Dent J. 2018 Jan 29;12:32-45. doi: 10.2174/1874210601812010032. eCollection 2018.
To evaluate transportation (T) and centering ability (CA) of root canal preparations using continuous or reciprocating nickel-titanium endodontic files.
Ninety-six mesiobuccal root canals of mandibular first and second molars were randomly divided into 6 groups (n=16) according to the rotary file used: 1. ProTaper Next; 2. ProTaper Gold; 3. Mtwo; 4. BioRaCe; 5. WaveOne Gold; 6. Reciproc. Root canals were prepared according to manufacturer's instructions. Cone beam computed tomography scans were obtained before and after root canal preparation. Measurements were made at six different reference points: 2, 3 and 4 mm from the apex and 2, 3 and 4 mm below furcation in different directions.
The greatest Mesiodistal (MD) Transportation (T) was found for Reciproc files (<0.05), and the greatest buccolingual (BL) T, for Reciproc, ProTaper Gold and ProTaper Next files (<0.05). The greatest Mesiodistal (MD) Centering Ability (CA) was found for BioRaCe files (<0.05), and the greatest Buccolingual (BL) CA, for BioRaCe and Mtwo files (<0.05).
All systems produced root canal transportation. No file system achieved perfect CA of root preparation. Reciproc files had the greatest MD T and BL T. BioRaCe files had the greatest MD CA, whereas BL CA was similar for BioRaCe and Mtwo files.
评估使用连续旋转或往复旋转镍钛根管锉进行根管预备时的偏移（T）和定心能力（CA）。
将下颌第一、二磨牙的96个近中颊根管根据使用的旋转锉随机分为6组（n = 16）：1. ProTaper Next；2. ProTaper Gold；3. Mtwo；4. BioRaCe；5. WaveOne Gold；6. Reciproc。按照制造商说明进行根管预备。在根管预备前后进行锥形束计算机断层扫描。在六个不同参考点进行测量：根尖上方2、3和4毫米处以及不同方向分叉下方2、3和4毫米处。
Reciproc锉的近远中（MD）偏移（T）最大（<0.05），Reciproc、ProTaper Gold和ProTaper Next锉的颊舌（BL）偏移最大（<0.05）。BioRaCe锉的近远中（MD）定心能力（CA）最大（<0.05），BioRaCe和Mtwo锉的颊舌（BL）定心能力最大（<0.05）。
所有系统均产生了根管偏移。没有锉系统在根管预备中达到完美的定心能力。Reciproc锉的MD偏移和BL偏移最大。BioRaCe锉的MD定心能力最大，而BioRaCe和Mtwo锉的BL定心能力相似。
