Geometric Analysis of Root Canals Prepared by Four Rotary NiTi Shaping Systems

Hashem, Ahmed Abdel Rahman; Ghoneim, Angie Galal; Lutfy, Reem Ahmed; Foda, Manar Yehia; Omar, Gihan

doi:10.1016/j.joen.2012.03.018

Cited by 111 publications

(126 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1,7,11 The shaping ability of these instruments could be related to the difference in manufacturing method, which consists of twisting the metal and special surface conditioning to provide increased flexibility and fracture resistance 23 Gergi et al 7 and Marzouk and Ghoneim 2 also reported that using 0.08 taper of TF to full WL did not result in any severe aberrations in the apical portion. Therefore, according to Marzouk and Ghoneim, 2 the improved results of canal transportation with TF compared to single file reciprocating systems may be due to using lower tapered files prior to using a 0.08 tapered file.…”

Section: Discussionmentioning

confidence: 99%

“…4,6,7 Several studies have demonstrated successful results with continuous rotation full-sequence NiTi systems such as ProTaper, 8,9 Hero 642, 10 Liberator 5 and Twisted File. 1,11 However, differences between the design and manufacturing procedures associated with these systems may result in variability in the final shape of the instrumented root canal. According to the Twisted File and ProTaper manufacturers, the use of greater tapers in combination with a "crown-down" preparation technique is intended to facilitate cleaning and shaping by shortening working time with the use of fewer instruments.…”

Section: Declaration Of Interestsmentioning

confidence: 99%

See 1 more Smart Citation

Computed tomography evaluation of rotary systems on the root canal transportation and centering ability

et al. 2015

View full text Add to dashboard Cite

The endodontic preparation of curved and narrow root canals is challenging, with a tendency for the prepared canal to deviate away from its natural axis. The aim of this study was to evaluate, by cone-beam computed tomography, the transportation and centering ability of curved mesiobuccal canals in maxillary molars after biomechanical preparation with different nickel-titanium (NiTi) rotary systems. Forty teeth with angles of curvature ranging from 20° to 40° and radii between 5.0 mm and 10.0 mm were selected and assigned into four groups (n = 10), according to the biomechanical preparative system used: Hero 642 (HR), Liberator (LB), ProTaper (PT), and Twisted File (TF). The specimens were inserted into an acrylic device and scanned with computed tomography prior to, and following, instrumentation at 3, 6 and 9 mm from the root apex. The canal degree of transportation and centering ability were calculated and analyzed using one-way ANOVA and Tukey's tests (α = 0.05). The results demonstrated no significant difference (p > 0.05) in shaping ability among the rotary systems. The mean canal transportation was: -0.049 ± 0.083 mm (HR); -0.004 ± 0.044 mm (LB); -0.003 ± 0.064 mm (PT); -0.021 ± 0.064 mm (TF). The mean canal centering ability was: -0.093 ± 0.147 mm (HR); -0.001 ± 0.100 mm (LB); -0.002 ± 0.134 mm (PT); -0.033 ± 0.133 mm (TF). Also, there was no significant difference among the root segments (p > 0.05). It was concluded that the Hero 642, Liberator, ProTaper, and Twisted File rotary systems could be safely used in curved canal instrumentation, resulting in satisfactory preservation of the original canal shape.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Declaration Of Interestsmentioning

confidence: 99%

Computed tomography evaluation of rotary systems on the root canal transportation and centering ability

et al. 2015

View full text Add to dashboard Cite

show abstract

“…An extracted human teeth model was used in this study as testing rotary NiTi file systems under realistic circumstances in natural dentin is considered more beneficial than in simulated acrylic canals, where acrylic resin is not an optimal material for testing rotary instruments because it does not reproduce the microhardness of dentin and the frequently encountered anatomic variations cannot be easily simulated (8,10) . Three levels (1, 3, and 8 mm from the root apex) were chosen representing the apical and middle thirds of root canal in which curvatures highly susceptible to iatrogenic mishaps (8) .…”

Section: Discussionmentioning

confidence: 99%

“…The results revealed that TF instruments produce significantly less transportation and remain more centered around the original canal. In a subsequent study on extracted mandibular molars with angles of curvature between 25 and 35, TF instruments showed a greater tendency to preserve the canal curvature than K3 instruments (7)(8)(9) .…”

Section: Introductionmentioning

confidence: 93%

“…The results showed that TF system was superior in shaping ability in curved canals, with the instruments remaining more centered and producing less canal transportation than the other systems. However, all tested rotary systems produced canal transportation at the apical and mid-regions of the canal (8) . The shaping ability and the time required to prepare curved root canals using Pathfile plus ProTaper Universal versus TF has been evaluated.…”

Section: Introductionmentioning

confidence: 96%

See 1 more Smart Citation

Comparison of Root Canal Transportation and Centering Ability Prepared with Two Single Files Rotary Systems using Cone Beam Computed Tomography Scanning (Ex vivo study)

2017

View full text Add to dashboard Cite

show abstract

Comparison of influence of different manufacturing methods on the cleaning efficiency of rotary nickel–titanium files

Çelik

Taşdemir

2012

Microscopy Res & Technique

View full text Add to dashboard Cite

The purpose of this study was to evaluate and compare cleaning effectiveness of TwistedFile, GT series X, Revo-S, RaCe, Mtwo, and ProTaper Universal rotary files in curved canals. Seventy mesiobuccal canals of extracted human first maxillary molars were divided into seven groups of 10 samples each. Canals were prepared with six nickel-titanium (NiTi) rotary systems and manual K-Flexofile. Irrigation was performed with 2 mL 2.5% NaOCl solution after each file, and 5 mL 2.5% NaOCl was used for the final flush. After the roots were split longitudinally, the presence of debris and smear layer was visualized using scanning electron microscopic photomicrographs taken at coronal, middle, and apical third. Mean scores for debris and the smear layer were calculated and statistically analyzed for significance between groups using the Kruskal-Wallis nonparametric analysis of variance (P < 0.05) and Mann-Whitney U test (P < 0.001). There was no significant difference among the groups in terms of debris and smear layer scores (P > 0.05). Without considering the preparation method used, while no statistically significant difference was found between the coronal third and the middle third (P > 0.05), higher amount of debris and smear layer were found in apical third (P = 0.001). The new generation of NiTi rotary files including the Twisted File and GT Series X presented similar cleaning effectiveness compared with traditionally ground NiTi rotary files.

show abstract

Geometric Analysis of Root Canals Prepared by Four Rotary NiTi Shaping Systems

Cited by 111 publications

References 27 publications

Computed tomography evaluation of rotary systems on the root canal transportation and centering ability

Computed tomography evaluation of rotary systems on the root canal transportation and centering ability

Comparison of Root Canal Transportation and Centering Ability Prepared with Two Single Files Rotary Systems using Cone Beam Computed Tomography Scanning (Ex vivo study)

Comparison of influence of different manufacturing methods on the cleaning efficiency of rotary nickel–titanium files

Contact Info

Product

Resources

About