Abstract
Introduction
The aim of this study was to describe the canal shaping properties of ProTaper Next
(PTN; Dentsply Maillefer, Ballaigues, Switzerland), ProTaper Universal (PTU; Dentsply
Tulsa Dental Specialties, Johnson City, TN), and WaveOne (Dentsply Maillefer) nickel-titanium
instruments in mandibular first molars by using micro–computed tomographic (micro-CT)
scanning.
Methods
A total of 36 maxillary first molars with 2 separate mesial canals and 1 distal canal
were selected and scanned preoperatively and postoperatively by using micro-CT scanning
with a voxel size of 30 μm. Canals were prepared with PTU, PTN, and WaveOne systems
under hypochlorite irrigation. The volume of the untreated canal; the volume of dentin
removed after preparation; the amount of the uninstrumented area; and the transportation
to the coronal, middle, and apical thirds of canals were measured. The preparation
time and instrument failure were also recorded.
Results
Instrumentation of canals increased their volume and surface area. The distal canals
had a significantly higher proportion of unprepared surfaces than mesial canals (P < .05). The PTN system produced less transportation than the WaveOne and PTU systems
in the apical third of the mesial canals (P < .05). There was no significant difference on apical transportation in distal canals
among the 3 instrument systems. Instrumentation with WaveOne was significantly faster
than with the other 2 instruments (P < .05).
Conclusions
The PTN, PTU, and WaveOne instruments shaped root canals in mandibular first molars
in vitro without significant shaping errors. The curved canals prepared using PTN had less
apical transportation than the canals prepared using WaveOne and PTU.
Key Words
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References
- Current Challenges and concepts in the preparation of root canal systems: a review.J Endod. 2004; 30: 559-567
- Alteration in the inherent metallic and surface properties of nickel-titanium root canal instruments to enhance performance, durability and safety: a focused review.Int Endod J. 2012; 45: 113-128
- Current challenges and concepts of the thermomechanical treatment of nickel-titanium instruments.J Endod. 2013; 39: 163-172
- Metallurgical characterization of M-Wire nickel-titanium shape memory alloy used for endodontic rotary instruments during low-cycle fatigue.J Endod. 2012; 38: 105-107
- Evaluation of the impact of raw materials on the fatigue and mechanical properties of ProFile Vortex rotary instruments.J Endod. 2012; 38: 398-401
- Shaping ability of .04 and .06 taper ProFile rotary nickel-titanium instruments in simulated root canals.Int Endod J. 1999; 32: 155-164
- Three-dimensional analysis of root canal geometry by high-resolution computed tomography.J Dent Res. 2000; 79: 1405-1409
- ProTaper rotary root canal preparation: effects of canal anatomy on final shape analysed by micro CT.Int Endod J. 2003; 36: 86-92
- Root canal preparation of maxillary molars with the self adjusting file: a micro-computed tomography study.J Endod. 2011; 37: 53-57
- 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: 385-388
- A comparison of canal preparations in straight and curved root canals.Oral Surg Oral Med Oral Pathol. 1971; 32: 271-275
- Root canal anatomy preservation of WaveOne reciprocating files with or without glide path.J Endod. 2012; 38: 101-104
- A high resolutyion computed tomographic study of changes in root canal isthmus area by instrumentation androot filling.J Endod. 2011; 37: 223-227
Available at: http://www.tulsadentalspecialties.com/Libraries/Tab_Content_-_Endo_Access_Shaping/NEXT_Rotary_File_Tip_Card.sflb.ashx. Accessed September 13, 2014.
- A comparison of the quality of root canal treatment in two Danish subpopulations examined 1974–75 and 1997–98.Int Endod J. 2001; 34: 607-612
- Root canal treatment in Denmark is most often carried out in carious vital molar teeth and retreatments are rare.Int Endod J. 2006; 39: 785-790
- Tooth morphology and access cavity preparation.in: Hargreaves K.M. Cohen S. Berman L.H. Cohen's Pathways of the Pulp. 10th ed. Mosby Elsevier, 2010: 136-222
- Effects of four NiTi preparation techniques on root canal geometry assessed by micro computed tomography.Int Endod J. 2001; 34: 221-230
- The WaveOne single-file reciprocating system.Roots. 2011; 1: 28-33
- Shaping ability of reciprocating motion in curved root canals: a comparative study with micro-computed tomography.J Endod. 2011; 37: 1296-1300
- Investigation on the shaping ability of nickel–titanium files when used with a reciprocating motion.J Endod. 2011; 37: 1398-1401
- Shaping ability and cleaning effectiveness of two single-file systems in severely curved root canals of extracted teeth: Reciproc and WaveOne versus Mtwo and ProTaper.Int Endod J. 2012; 45: 449-461
- Canal shaping with WaveOne Primary reciprocating files and ProTaper system: a comparative study.J Endod. 2012; 38: 505-509
- Computed tomographic evaluation of canal shape instrumented by different kinematics rotary nickel-titanium systems.J Endod. 2013; 39: 906-909
- Bacterial reduction with nickel-titanium rotary instrumentation.J Endod. 1998; 24: 763-767
- Irrigation in endodontics.Dent Clin North Am. 2010; 54: 291-312
- Apically extruded debris with reciprocating single-file and full-sequence rotary instrumentation systems.J Endod. 2012; 38: 850-852
- In vitro canal and isthmus debris removal of the self-adjusting file, K3, and WaveOne files in the mesial root of human mandibular molars.J Endod. 2012; 38: 1140-1144
Article info
Publication history
Published online: September 06, 2014
Identification
Copyright
© 2014 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
