Analysis of the preparation obtained by three techniques of root canal instrumentation using computed tomography

Methods Thirty mandibular molar mesiobuccal canals were divided in three groups according to instrumentation technique: Group 1 hand instrumentation with balanced force technique; Group 2 Protaper Universal rotary system following manufacturer's instructions; and Group 3 Protaper Universal rotary system and Gates-Glidden drills. Teeth were evaluated by computed tomography before and after preparation at three axial cuts: 3mm, 5mm, and 7mm from the root apex. Data were subjected to statistical analysis using the F, Chi-Square, Likelihood Ratio Chi-Square, and Mantel-Haenszel Chi-Square tests.

[1]  E Schäfer,et al.  Comparative investigation of two rotary nickel-titanium instruments: ProTaper versus RaCe. Part 1. Shaping ability in simulated curved canals. , 2004, International endodontic journal.

[2]  F. Paqué,et al.  Micro-computed tomography evaluation of the preparation of long oval root canals in mandibular molars with the self-adjusting file. , 2011, Journal of endodontics.

[3]  O. Peters,et al.  ProTaper rotary root canal preparation: effects of canal anatomy on final shape analysed by micro CT. , 2003, International endodontic journal.

[4]  Homan Hossein Javaheri,et al.  A comparison of three Ni-Ti rotary instruments in apical transportation. , 2007, Journal of endodontics.

[5]  O. Peters,et al.  Comparing apical preparations of root canals shaped by nickel-titanium rotary instruments and nickel-titanium hand instruments. , 2001, Journal of endodontics.

[6]  Y. Garip,et al.  The use of computed tomography when comparing nickel-titanium and stainless steel files during preparation of simulated curved canals. , 2001, International endodontic journal.

[7]  T. Attin,et al.  Preparation of oval-shaped root canals in mandibular molars using nickel-titanium rotary instruments: a micro-computed tomography study. , 2010, Journal of endodontics.

[8]  P Martus,et al.  Comparative study of six rotary nickel-titanium systems and hand instrumentation for root canal preparation. , 2005, International endodontic journal.

[9]  G. Cheung,et al.  Micro-computed tomographic comparison of nickel-titanium rotary versus traditional instruments in C-shaped root canal system. , 2010, Journal of endodontics.

[10]  O A Peters,et al.  Effects of four Ni-Ti preparation techniques on root canal geometry assessed by micro computed tomography. , 2001, International endodontic journal.

[11]  David D Roland,et al.  The effect of preflaring on the rates of separation for 0.04 taper nickel titanium rotary instruments. , 2002, Journal of endodontics.

[12]  J. Leeb.  Canal orifice enlargement as related to biomechanical preparation. , 1983, Journal of endodontics.

[13]  Ove A Peters,et al.  Effects of root canal preparation on apical geometry assessed by micro-computed tomography. , 2009, Journal of endodontics.

[14]  D. Watts,et al.  A microcomputed tomography scanning study of root canal space: changes after the ultrasonic removal of fractured files. , 2009, Journal of endodontics.

[15]  S. W. Schneider,et al.  A comparison of canal preparations in straight and curved root canals. , 1971, Oral surgery, oral medicine, and oral pathology.

[16]  F S Weine,et al.  The effect of preparation procedures on original canal shape and on apical foramen shape. , 1975, Journal of endodontics.

[17]  Manoel Eduardo de Lima Machado,et al.  Eficácia da técnica seriada convencional e das técnicas escalonadas ápico-cervical e cévico-apical no preparo químico-cirúrgico de canais curvos , 1995 .

[18]  Roberto Brandão Garcia,et al.  Avaliação radiográfica do desvio apical do canal radicular após a instrumentação manual com limas Flexofile, Flex-R e Onyx-R e o sistema mecânico rotatório Profile , 1999 .

[19]  D C Brown,et al.  A reconstructed computerized tomographic comparison of Ni-Ti rotary GT files versus traditional instruments in canals shaped by novice operators. , 2001, International endodontic journal.

[20]  H. Raes,et al.  Shaping ability of GTTM Rotary Files in simulated resin root canals. , 2002, International endodontic journal.

[21]  T R Pitt Ford,et al.  Hand and nickel-titanium root canal instrumentation performed by dental students: a micro-computed tomographic study. , 2006, European journal of dental education : official journal of the Association for Dental Education in Europe.

[22]  C M Bramante,et al.  A methodology for evaluation of root canal instrumentation. , 1987, Journal of endodontics.

[23]  E. Berutti,et al.  Influence of manual preflaring and torque on the failure rate of ProTaper rotary instruments. , 2004, Journal of endodontics.

[24]  P. Wesselink,et al.  The risk of furcal perforation in mandibular molars using Gates-Glidden drills with anticurvature pressure. , 2005, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[25]  C E del Rio,et al.  Comparison of nickel-titanium and stainless steel hand-file instrumentation using computed tomography. , 1996, Journal of endodontics.

[26]  U. İnan,et al.  Canal preparation with Hero 642 rotary Ni-Ti instruments compared with stainless steel hand K-file assessed using computed tomography. , 2005, International endodontic journal.