Comparative evaluation of the shaping ability of two different nickel–titanium rotary files in curved root canals of extracted human molar teeth

Ferrara, Giulia; Taschieri, Silvio; Corbella, Stefano; Ceci, Caterina; Fabbro, Massimo Del; Machtou, Pierre

doi:10.1111/jicd.12187

Cited by 9 publications

(7 citation statements)

References 43 publications

(133 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Instruments with different kinematics can be used for root canal preparation . Irrespective of the system used, all promote extrusion of microorganisms, contaminated dentin, irrigant solutions, and remaining pulp tissue beyond the apical foramen, causing postoperative complications, such as periapical inflammation and pain .…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the cross‐section and asymmetrical rotation axis of the PTN system instruments, enable them to cut a larger amount of dentin than instruments of the conventional ProTaper Universal (PTU; Dentsply‐Maillefer, Switzerland) and RC systems . Therefore, the combination of distinct characteristics, such as kinematic motion, type of alloy, and cross‐section of the instruments, plays a fundamental role in their shaping ability …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of large instrument use on shaping ability and debris extrusion of rotary and reciprocating systems

Costa

Sponchiado

Garcia

et al. 2017

J of Invest & Clin Dent

View full text Add to dashboard Cite

Aim: The aim of the present study was to evaluate the effect of large instrument use on the shaping ability and apical debris extrusion of rotary and reciprocating systems in oval-shaped root canals.Methods: Forty-five mandibular premolars, with an 18-mm long, oval-shaped single canal, and apical diameter ranging from 300 to 350 μm, were separated into three groups (n=15), according to the system used: ProTaper Universal group, F5 (0.50/0.05);ProTaper Next (PTN group), X5 (0.50/0.06); and Reciproc (RC group), R50 (0.50/0.05). Cone-beam computed tomography was performed before and after preparation toanalyze apical transportation (AT), centering ability (CA), and change in root canal diameter (CRCD). For evaluating apical debris extrusion, the roots were coupled to preweighed glass receptacles to collect the extruded debris during preparation.Results: All systems promoted AT and apical debris extrusion; the latter was higher for the PTN group (P<.05). No system presented perfect CA. The RC group demonstrated the largest CRCD (P<.05). Conclusions:As consequences of their use, the large instruments promoted undesirable AT and debris extrusion, irrespective of the system used to perform root canal preparation. Moreover, no system was able to remain perfectly centralized within the root canal. K E Y W O R D Sendodontic, large instrument, mandibular premolar, root canal preparation, tomography

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of large instrument use on shaping ability and debris extrusion of rotary and reciprocating systems

Costa

Sponchiado

Garcia

et al. 2017

J of Invest & Clin Dent

View full text Add to dashboard Cite

show abstract

“…Extracted teeth were selected for the present study. Although simulated canals can be better standardized in terms of their root curvature and morphology (Ferrara, Taschieri, Corbella, Ceci, Del Fabbro, & Machtou, ), they cannot simulate the same range of hardness and surface resistance of natural teeth. Therefore, their surface would not be filed similar to a natural root.…”

Section: Discussionmentioning

confidence: 99%

Quantitative evaluation of root canal surface roughness after filing with adaptive reciprocating and continuous rotary instruments

Manesh

Giacomin

Stoll

2017

Microscopy Res & Technique

View full text Add to dashboard Cite

Obtaining clean and smooth root canal walls is the ideal clinical outcome of the cleaning and shaping stage in root canal treatment. This study compares the surface roughness of root canal surfaces instrumented with a NiTi filing system with either adaptive reciprocating (AR) or continuous rotation (CR). Root canal cleaning and shaping was carried out on the mesial canals of 24 extracted first molars roots with either AR or CR. Roots were split in half and the surface roughness of their canals was evaluated in 12 three dimensional roughness reconstructions using a scanning electron microscope. Rz (nm) values were calculated in three areas of each reconstruction and analyzed (α = 0.05). Mann-Whitney tests showed that surface roughness was significantly higher overall in the AR group (Rz = 967 ± 250 nm) compared with the CR group (Rz = 739 ± 239 nm; p = 0.044). The roughness values generally increased from apical towards the coronal third in both groups. A less aggressive finishing file or a continuous rotary system to end the cleaning and shaping stage may be beneficial to reduce roughness of the root canal surface.

show abstract

“…Ninety simulated S-shaped root canals in clear resin blocks (Endo Training block-S, Dentsply Maillefer, Ballaigues, Switzerland) with a60 o coronal curvature (5mm radius) and 60 o apical curvature (4mm radius) were used in this study. All canals included the following: 0.02 taper, 16mm length and 0.15mm apical diameter (Pic 1).Sample size calculation before the study revealed a minimum of 15 canals in each group to support the statistical analysis (Ferrara G, 2017). The blocks were randomly assigned into three groups (n = 30), according to the investigated instruments: Hyflex® CM (CM group), Protaper GOLD TM (GOLD group), and Twisted File® (R group).…”

Section: Methodsmentioning

confidence: 99%

“…Although the manufacturers declare that their production is very resistant and long-lasting, there is still no standardized method for testing and improving this. Extracted human teeth are ideal material for testing, but neither hardness of dentine nor curves of canal anatomy can be standardized (Ferrara G, 2017). The previous studies have shown that mistakes and complications during mechanical root canal instrumentation depend on characteristics of the instruments' alloy (Hiran-us S P. S., 2016, Hiran-us S S. J., 2005, Gergi R, 2010, Gutmann JL, 2012.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Fatigue, Shaping Ability and Apical Transportation of Endodontic Rotary Instruments Made From Different Niti Alloys in Simulated S-Shaped Root Canal

Sinkevičiūtė¹

2019

IJAST

View full text Add to dashboard Cite

Aim: investigate the influence of NiTi alloy on cyclic fatigue resistance and fracture, shaping ability and apical transportation of rotary endodontic instruments in artificial S-shaped canals. Results: No instrument fractured. The greatest apical transportation was observed in the R group, the least-in the GOLD group. R group showed greater canal deviation at coronal and apical parts compared to other groups (p<0.05). CM group removed less resin at middle part, compared with the GOLD group. The minimal canal deviation in the apical curvature was observed in the GOLD group, while in the coronal curvature in the CM group. Conclusions: Instruments were resistant to fracture. Protaper GOLD TM instruments caused minimal apical transportation and apical canal deviation, Hyflex® CM instruments-coronal canal deviation.

show abstract

Comparative evaluation of the shaping ability of two different nickel–titanium rotary files in curved root canals of extracted human molar teeth

Abstract: The ProTaper Universal and ProTaper Next systems performed similarly with regard to the straightening of curved root canals and apical transportation. ProTaper Next was significantly faster than ProTaper Universal.

Cited by 9 publications

References 43 publications

Effect of large instrument use on shaping ability and debris extrusion of rotary and reciprocating systems

Effect of large instrument use on shaping ability and debris extrusion of rotary and reciprocating systems

Quantitative evaluation of root canal surface roughness after filing with adaptive reciprocating and continuous rotary instruments

Cyclic Fatigue, Shaping Ability and Apical Transportation of Endodontic Rotary Instruments Made From Different Niti Alloys in Simulated S-Shaped Root Canal

Contact Info

Product

Resources

About