EVALUATION OF DENTINAL MICRO CRACK FORMATION BY NEW SELF ADJUSTING FILE SYSTEM VERSUS CONVENTIONAL NITI ROTARY INSTRUMENTS: AN IN VITRO STUDY.

Objectives: The purpose of this in vitro study was to evaluate gaps or voids occurring in roots filled with three different sealers.Methods: Thirty extracted human single-rooted teeth were decoronated, instrumented using NiTi rotary instruments, divided into three groups (n=10 per group) and obturated with one of the following: Epiphany with Resilon, MetaSEAL with gutta-percha or AH Plus with gutta-percha using the match-taper single-cone technique. After storage for one week in 100% humidity at 37°C, the teeth were horizontally sectioned (n=10). Photographs were taken from the coronal, median and apical parts of the roots using a stereomicroscope at 10X magnification, and the images were then transferred to a computer. The mathematical method known as the ‘Affine Transformation’ was used for the transformation of pixel coordinates to ground coordinates in the Netcad Software program. The mean areas (μm2) of the gaps between the sealer and root dentin or gutta percha/resilon and the gaps between the sealer and/or voids inside the sealer mass were measured, scored on a 0-3 scale and statistically analyzed with the Kruskal-Wallis test.Results: The mean total area of gaps or voids for each sealer was 4631.80 μm2 for the Epiphany- Resilon, 3826.80 μm2 for the MetaSEAL-gutta-percha and 31334 μm2 for the AH Plus-gutta-percha. The MetaSEAL-gutta-percha group showed more gap or void-free interfaces. No significant differences were found among the sealers in the scores for the gap areas (P<.05), and the MetaSEAL showed similar interfaces with Epiphany.Conclusions: No significant differences in the mean areas of gaps or voids were found among the tested resin-based sealers. (Eur J Dent 2010;4:101-109)

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Comparative evaluation of apical extrusion of debris and irrigant with three rotary instruments using crown down technique – An in vitro study

Journal of Oral Biology and Craniofacial Research ◽

10.1016/j.jobcr.2012.05.010 ◽

2012 ◽

Vol 2 (2) ◽

pp. 105-109 ◽

Cited By ~ 2

Author(s):

Rahul Jindal ◽

Smita Singh ◽

Siddharth Gupta ◽

Punita Jindal

Keyword(s):

Comparative Evaluation ◽

In Vitro Study ◽

Vitro Study ◽

Rotary Instruments ◽

Apical Extrusion

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Comparative analysis of the cleaning ability of single file versus multiple file system (An in vitro study)

Egyptian Dental Journal ◽

10.21608/edj.2019.75978 ◽

2019 ◽

Vol 65 (4) ◽

pp. 3601-3606

Author(s):

Shady Ibrahim ◽

Amr Bayoumi ◽

Ehab Hassanein

Keyword(s):

Comparative Analysis ◽

File System ◽

In Vitro Study ◽

Vitro Study ◽

Single File

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Computed Tomography Assessment of Canal Centering Ability Using Hand and Rotary Instruments - an In Vitro Study

Dental Journal of Advance Studies ◽

10.1055/s-0038-1672064 ◽

2016 ◽

Vol 04 (03) ◽

pp. 165-169

Author(s):

Alka Arora ◽

Devendera Chaudhary ◽

Shalu Krishan ◽

Bhupinder Padda

Keyword(s):

Computed Tomography ◽

Statistical Data ◽

In Vitro Study ◽

Vitro Study ◽

Permanent Teeth ◽

Test Results ◽

Ct Scanner ◽

Variance Test ◽

Rotary Instruments

Abstract Aim: The present in vitro study aims to evaluate canal preparation comparing centering ability of ProTaper, Mtwo, Wave One, Hand Ni-Ti K-files using Computed Tomography(CT). Materials and Methods: Sixty extracted permanent teeth were selected and decoronated at 11 mm from the apical end. Samples were randomly divided into 4 groups as ProTaper, Mtwo, Wave One, Hand Ni-Ti K-files. Teeth were scanned by CT Scanner. Sectioning was started at 1 mm from the apex up to coronal orifice. Nine levels at 1 mm each were chosen for evaluation in the Computed Tomography. The canals were prepared and a post instrumentation scan was again taken. The pre and postoperative CT images were superimposed at all nine levels. The canal centering ability was calculated. Statistical data was evaluated using One Way Analysis Of Variance test. Results: Amongst the rotary and reciprocal groups the best canal centering ability at the apical third was seen with Wave one. All the three groups behaved similarly in the middle and coronal thirds of the root canal. Conclusion: Keeping in mind the importance of apical third preparation and consistent behaviour in all directions, Wave One may be considered by far the best in the apical third.

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