Shaping ability of reciprocating single-file and full-sequence rotary instrumentation systems in simulated curved canals

 

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ABSTRACT

Objective: The purpose of this study was to evaluate the shaping ability of three nickel-titanium systems in simulated curved canals. Materials and Methods: Sixty simulated canals were prepared to apical size 25 with Reciproc, S5, and twisted file (TF) instruments. Standardized pre and postoperative images were taken using a digital camera, were superimposed and aberrations were recorded. Material removal was measured at five points: The canal orifice, halfway to the orifice, beginning of the curve, the apex of the curve, and end-point. The data were analyzed using Kolmogorov–Smirnov, analysis of variance, and Tukey tests. Results: The mean total width of the prepared canals in the Reciproc group was greater than the TF and S5 groups at halfway to the orifice, the beginning of the curve, the apex of the curve, and the end-point (P < 0.05). Mean absolute transportation was always <0.16 mm; however, significant differences occurred between the three systems at the orifice, halfway to the orifice, and the beginning of the curve (P < 0.05). TF created minimal absolute transportation at halfway to the orifice and the beginning of the curve, and greater absolute transportation at the orifice compared with the Reciproc and S5 instruments. However, the difference between the S5 and TF groups was not statistically significant at halfway to the orifice (P > 0.05). Conclusions: Under the conditions of the study, Reciproc produced widest canal shapes. TF provided more centered apical preparation and maintained the original canal shape well.

• REFERENCES

• 1 Peters OA. Current challenges and concepts in the preparation of root canal systems: A review. J Endod 2004; 30: 559-67
  CrossrefPubMedGoogle Scholar
• 2 Schilder H. Cleaning and shaping the root canal. Dent Clin North Am 1974; 18: 269-96
  PubMedGoogle Scholar
• 3 Esposito PT, Cunningham CJ. A comparison of canal preparation with nickel-titanium and stainless steel instruments. J Endod 1995; 21: 173-6
  CrossrefPubMedGoogle Scholar
• 4 Perez F, Schoumacher M, Peli JF. Shaping ability of two rotary instruments in simulated canals: Stainless steel ENDOflash and nickel-titanium HERO shaper. Int Endod J 2005; 38: 637-44
  CrossrefPubMedGoogle Scholar
• 5 Thompson SA. An overview of nickel-titanium alloys used in dentistry. Int Endod J 2000; 33: 297-310
  CrossrefPubMedGoogle Scholar
• 6 Alapati SB, Brantley WA, Iijima M, Clark WA, Kovarik L, Buie C. et al. Metallurgical characterization of a new nickel-titanium wire for rotary endodontic instruments. J Endod 2009; 35: 1589-93
  CrossrefPubMedGoogle Scholar
• 7 Plotino G, Grande NM, Porciani PF. Deformation and fracture incidence of reciproc instruments: A clinical evaluation. Int Endod J 2015; 48: 199-205
  CrossrefPubMedGoogle Scholar
• 8 Larsen CM, Watanabe I, Glickman GN, He J. Cyclic fatigue analysis of a new generation of nickel titanium rotary instruments. J Endod 2009; 35: 401-3
  CrossrefPubMedGoogle Scholar
• 9 Huang HM, Chang WJ, Teng NC, Lin HL, Hsieh SC. Structural analysis of cyclic-loaded nickel-titanium rotary instruments by using resonance frequency as a parameter. J Endod 2011; 37: 993-6
  CrossrefPubMedGoogle Scholar
• 10 Calberson FL, Deroose CA, Hommez GM, Raes H, De Moor RJ. Shaping ability of GT^TM Rotary Files in simulated resin root canals. Int Endod J 2002; 35: 607-14
  CrossrefPubMedGoogle Scholar
• 11 Thompson SA, Dummer PM. Shaping ability of hero 642 rotary nickel-titanium instruments in simulated root canals: Part 2. Int Endod J 2000; 33: 255-61
  CrossrefPubMedGoogle Scholar
• 12 Schäfer E, Tepel J, Hoppe W. Properties of endodontic hand instruments used in rotary motion. Part 2. Instrumentation of curved canals. J Endod 1995; 21: 493-7
  CrossrefPubMedGoogle Scholar
• 13 Gergi R, Osta N, Bourbouze G, Zgheib C, Arbab-Chirani R, Naaman A. Effects of three nickel titanium instrument systems on root canal geometry assessed by micro-computed tomography. Int Endod J 2015; 48: 162-70
  CrossrefPubMedGoogle Scholar
• 14 Capar ID, Ertas H, Ok E, Arslan H, Ertas ET. Comparative study of different novel nickel-titanium rotary systems for root canal preparation in severely curved root canals. J Endod 2014; 40: 852-6
  CrossrefPubMedGoogle Scholar
• 15 Giansiracusa RubiniA, Plotino G, Al-Sudani D, Grande NM, Sonnino G, Putorti E. et al. A new device to test cutting efficiency of mechanical endodontic instruments. Med Sci Monit 2014; 20: 374-8
  CrossrefPubMedGoogle Scholar
• 16 Schäfer E, Erler M, Dammaschke T. Comparative study on the shaping ability and cleaning efficiency of rotary Mtwo instruments. Part 1. Shaping ability in simulated curved canals. Int Endod J 2006; 39: 196-202
  CrossrefPubMedGoogle Scholar
• 17 Aydin C, Inan U, Yasar S, Bulucu B, Tunca YM. Comparison of shaping ability of RaCe and hero shaper instruments in simulated curved canals. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2008; 105: e92-7
  CrossrefPubMedGoogle Scholar
• 18 Bürklein S, Benten S, Schäfer E. Shaping ability of different single-file systems in severely curved root canals of extracted teeth. Int Endod J 2013; 46: 590-7
  CrossrefPubMedGoogle Scholar
• 19 Bürklein S, Börjes L, Schäfer E. Comparison of preparation of curved root canals with Hyflex CM and Revo-S rotary nickel-titanium instruments. Int Endod J 2014; 47: 470-6
  CrossrefPubMedGoogle Scholar
• 20 Saleh AM, Vakili GilaniP, Tavanafar S, Schäfer E. Shaping ability of 4 different single-file systems in simulated S-shaped canals. J Endod 2015; 41: 548-52
  CrossrefPubMedGoogle Scholar
• 21 Baugh D, Wallace J. The role of apical instrumentation in root canal treatment: A review of the literature. J Endod 2005; 31: 333-40
  CrossrefPubMedGoogle Scholar
• 22 Jeon HJ, Paranjpe A, Ha JH, Kim E, Lee W, Kim HC. Apical enlargement according to different pecking times at working length using reciprocating files. J Endod 2014; 40: 281-4
  CrossrefPubMedGoogle Scholar
• 23 Marceliano-Alves MF, Sousa-Neto MD, Fidel SR, Steier L, Robinson JP, Pécora JD. et al. Shaping ability of single-file reciprocating and heat-treated multifile rotary systems: A micro-CT study. Int Endod J. doi: 10.1111/iej.12412. Epub ahead of print [Last accessed on 2014 Nov 14]
  Google Scholar
• 24 Gergi R, Rjeily JA, Sader J, Naaman A. Comparison of canal transportation and centering ability of twisted files, pathfile-ProTaper system, and stainless steel hand K-files by using computed tomography. J Endod 2010; 36: 904-7
  CrossrefPubMedGoogle Scholar
• 25 Zhao D, Shen Y, Peng B, Haapasalo M. Micro-computed tomography evaluation of the preparation of mesiobuccal root canals in maxillary first molars with hyflex CM, twisted files, and K3 instruments. J Endod 2013; 39: 385-8
  CrossrefPubMedGoogle Scholar
• 26 El Batouty KM, Elmallah WE. Comparison of canal transportation and changes in canal curvature of two nickel-titanium rotary instruments. J Endod 2011; 37: 1290-2
  CrossrefPubMedGoogle Scholar
• 27 Nazari MoghadamK, Shahab S, Rostami G. Canal transportation and centering ability of twisted file and reciproc: A cone-beam computed tomography assessment. Iran Endod J 2014; 9: 174-9
  PubMedGoogle Scholar
• 28 Gergi R, Arbab-Chirani R, Osta N, Naaman A. Micro-computed tomographic evaluation of canal transportation instrumented by different kinematics rotary nickel-titanium instruments. J Endod 2014; 40: 1223-7
  CrossrefPubMedGoogle Scholar