Comparison Of Shaping Ability Research Articles

Comparison of shaping ability and cutting efficiency of a novel rotary file system (Trunatomy) versus Protaper Next and 2Shape in severely curved mandibular mesiobuccal canals (An in vitro study)

Comparison of shaping ability and cutting efficiency of a novel rotary file system (Trunatomy) versus Protaper Next and 2Shape in severely curved mandibular mesiobuccal canals (An in vitro study)

Comparison of Shaping Ability between Continuous Rotary and Manual Instrumentations in Pediatric Endodontics

Objective: The aim of this in vitro study was to evaluate the efficacy of rotary EndoArt Ni-Ti Gold Pedo Kit and K-files in shaping ability, canal transportation, centering ability and instrumentation time in primary molars. Methods: For the study total of 30 extracted primary molars root with minimum 7mm root length were selected. Shaping of root canals in primary molars were done using the two systems, and CBCT and specialized software were used for scanning and analysis of pre-operative and post-operative to evaluate the groups for their shaping properties, apical transportation and preparation time in primary root canals. Results: No differences were found in canal transportation measures and instrumentation time between the two groups (p>0.05). The EndoArt group removed more dentin compared to K-file in all sides of the root curvature. The statistical differences were significant for coronal and middle third of the root (p<0.05). Conclusions: Under the conditions of this study, rotary EndoArt Ni-Ti Gold Pedo Kit provided more conical canals than K-files in primary teeth.

Hand-operated and rotary mity instruments in combination with an endodontic handpiece and endodontic motor preparation: A comparison of shaping ability in simulated curved root canals

The aim of this in vitro pilot study was to describe the shaping ability of a rotary nickel-titanium (NiTi) instrument in combination with different torque-controlled endodontic devices and to compare them with NiTi files in combination with a conventional preparation by hand in severely curved root canals of plastic blocks.

Comparison of shaping ability of three different rotary instruments in simulated root canals using computer image analysis: An in vitro study

Aim: This in vitro study was done to compare the shaping ability of ProTaper, K3, and Hero Shapers in clear resin blocks with simulated root canals using computer image software analysis. Materials and Methods: 45 clear resin blocks with simulated root canals were divided into three groups of 15 each. Preinstrumentation digitalized images of the blocks were made and stored. Each group was instrumented with ProTaper, K3, and Hero Shapers, respectively. Postinstrumentation images of the blocks were made after injecting a contrast medium to improve the outlines of the root canals. Pre- and post-instrumentation images were magnified, superimposed, and assessed using computer image analysis program (pattern matching analysis). Material removal was measured at nine points in the inner wall and outer wall ending 1 cm from the apical terminus. Statistical Analysis: Student's t-test and one-way analysis of variance were used to compare the overall change in the width in the mesial view by using ProTaper, K3, and Hero Shapers. Results: ProTaper showed more change in width, followed by K3 and Hero Shapers. Conclusion: ProTaper and K3 showed significant removal of material in the outer wall of the coronal and apical 3 rd , followed by inner wall of the middle 3 rd . Hero Shapers showed significant removal of material in the outer wall of coronal 3 rd , with less significant changes in the middle 3 rd and even material removal in the apical 3 rd .

Comparison of shaping ability between single length technique and crown-down technique using Mtwo rotary file

Comparison of shaping ability between single length technique a nd crown-down technique using Mtwo rotary file The aims of this study were to compare the shaping effect and safety between single length tech- nique recommended by manufacturer and crown-down technique using Mtwo rotary file and to pre- sent a modified method in use of Mtwo file. Sixty simulated root canal resin blocks were used. The canals were divided into three groups according to instrument and the manner of using methods. Each group had 20 specimens. Group MT was instrumented with single length technique of Mtwo, group MC was instrumented with crown- down technique of Mtwo and group PT was instrumented with crown-down technique of ProTaper. All of the rotary files used in this study were operated by an electric motor. The scanned canal images of before and after preparation were superimposed. These superimposed images were evalu- ated at apical 1 to 8 mm levels. Angle changes were calculated. The preparation time, weight loss, instrument failure and binding, canal aberrations, and centering ratio were measured. Statistical analysis of the three experimental groups was performed with ANOVA and Duncan' s multiple range tests for post-hoc comparison and Fisher' s exact test was done for the frequency comparison. In total preparation time, group MT and group MC were less than group PT. In the aberrations, group MT had more elbows than those of group MC and group PT. The binding of group MC was least and group MT was less than group PT ( P < 0.05). Under the condition of this study, crown-down technique using Mtwo rotary file is better and safer method than single length technique recommended by the manufacturer. (J Kor Acad Cons Dent

Comparison of shaping ability using various Nickel-Titanium rotary files and hybrid technique

Currently, various Nickel-Titanium rotary files are used in endodontic treatment, but there is no one perfect system that can be applied to any clinical situation. Therefore, the combined uses of various file systems which can emphasize the advantages of each system are introduced as hybrid instrumentation. The ProTaper system is efficient in body shaping and apical pre-enlargement but is reported to have more possibility of transportation and produce more aberrations and deformation in more or less severe curved canals. Recently, new ProTaper system (ProTaper Universal) with different configuration and cross-sectional design to overcome the week points of ProTaper have been marketed. The purpose of this study was to compare and evaluate the shaping abilities of ProTaper, ProTaper Universal system, and two hybrid methods using S-series of ProTaper Universal and Hero Shaper or ProFile. The time lapses for instrumentation were measured and the used files were inspected for distortion. The pre- and post-instrumented root canals were scanned and superimposed to evaluate the aberrations and reduction of root canal curvature and change of radius of canal curvature. The increased canal width and apical centering ratio were calculated at 1, 2, 3, 4 and 5 ㎜ levels from apical foramen. Under the conditions of this study, the ProTaper Universal seems to have better shaping ability than ProTaper in terms of instrumented width and instrumentation time. It may be suggested that the ProTaper Universal system is efficient as much as hybrid instrumentation using ProTaper and other constant-tapered NiTi file systems in highly experienced operators.

Comparison of shaping ability between various hybrid instrumentation methods with ProTaper

The purpose of this study was to compare and evaluate the shaping abilities of various hybrid instrumentation method using constant tapered file systems with S1 and the difference between experts and inexperienced clinicians in use of NiTi file. Three hybrid methods used in this study were composed of respectively. The -alone method (group C) was introduced as a control group. After canal preparation, the lapse of time was recorded. The images of pre- and post-operative canal were scanned and superimposed. Amounts of instrumented canal widths and centering ratio were measured at apical 1, 2 and 3 mm levels and statistical analysis was performed In this study. both of the group C and S took more time to prepare canals than other groups, Inexperienced operators required more time for the entire preparation with the groups C and H than the experienced (p-alone method or the hybrid technique using stainless steel files. As such, within experienced operators, group H also showed better results in addition to the group P. Under these condition, the hybrid methods of each the system and with ProTaper are recommendable comparative to -alone method. According to the results, the hybrid instrumentation method is a more appropriate method of canal preparation than single file system for narrow or curved canals.

A Comparison of Shaping Ability Using ProFile, GT File, and Flex-R Endodontic Instruments in Simulated Canals

A total of 160 resin-simulated canal blocks with 20-degree or 30-degree curvature were prepared by ProFile rotary instruments, GT rotary files, and the balanced force technique with Flex-R files. Using an image analysis computer application, the pre- and postoperative images were stored and superimposed, and then the amount of material removed from the preoperative inner and outer curved walls was measured at five levels in the apical 5 mm of the canal. The time required for canal preparation, including irrigation, and the time taken to change instruments was recorded. At 1 mm from the apical end, the directions of canal transportation were most frequently toward the outer aspect of the curvature, with the only exception being the canals shaped by the balanced force technique in which more was removed from the inner aspect. The balanced force technique required more preparation time than the rotary instrumentation.

PR 5 A comparison of shaping ability using ProFile, CT file, and flex-R endodontic instruments in simulated canals

PR 5 A comparison of shaping ability using ProFile, CT file, and flex-R endodontic instruments in simulated canals