An ex vivo comparative analysis on shaping ability of four NiTi rotary endodontic instruments using spiral computed tomography

Abstract

Objective:Analysis of shaping ability of four different rotary endodontic instruments using spiral computed tomography (CT).Materials and Methods:Eighty freshly extracted human mandibular first molars were used in the present study. Samples were randomly divided into four experimental groups with twenty samples in each group. Images of mesiobuccal canal of each sample were obtained pre- and post-operatively using spiral CT. All samples were prepared using their respective endodontic file systems (group I - ProTaper, group II - K3, group III - RaCe, and group IV - Mtwo). Image analyses were done using image analysis software for evaluation of canal transportation and centering ability. Data was then statistically analyzed using analysis of variance.Results:There was no statistically significance in transportation in their intergroup difference at any of the three locations (coronal, middle, and apical third). In centering ability there was no statistically significance in the coronal and middle third of the intergroup. However, there was a statistically significance of (P = 0.044) at the apical third between all the groups.Conclusion:Canals prepared with ProTaper had more canal transportation at all the three levels of root canal (coronal, middle, and apical third). Canals prepared with Mtwo were well centered at coronal and middle third whereas with RaCe canals were centered only at the apical third. All instruments showed some degree of canal aberrations in terms of shaping ability.

Comparison of canal transportation and centering ability of rotary protaper, one shape system and wave one system using cone beam computed tomography: An in vitro study

“…However more aggressive cutting could produce increased canal transportation. [ 9 ] Other than clinical guidelines, little information exists about these instruments. However, the risk of fracture of Ni-Ti rotary files is still a concern among clinicians.…”

Ex vivo comparative analysis of root-canal dentin removal by MTwo and K3 rotary fi les using spiral computed tomography

“…Within the limits of an "in vitro" study, the cone beam computed tomography offers a method that is relatively simple and economical and provides useful information about the action of instruments in the canal space (Gergi et al, 2010;Maitin et al, 2013;Özer, 2011;Tasdemir, Aydemir, Inan, & Ünal, 2005). An alternative conservative method of assessing root canal instrumentation techniques is the microcomputer tomography that is more expensive and requires well-trained operators in order to obtain valid results (Peters et al 2001;You et al, 2011;Zhao et al 2013).…”

“…It can render cross-sectional (cut plane) and 3D images that are highly accurate and quantifi able. At any level, the amount of post instrumentation dentinal removal and canal transportation can be analyzed without loss of specimen (Narayan et al, 2012, Maitin et al, 2013and Deepak et al, 2015. The aim of this study is analysis of root canals dentin removal shaped by M Two and K3 rotary fi les using spiral computed tomography.…”

Root canal centering ability of rotary cutting nickel titanium instruments: A meta-analysis

“…The fraction of prepared surface can be analyzed with software which does not interfere in the original format of the images(digital imaging communications in medicine, DICOM), permitting the analysis of the exact position and direction of canal transportation by CT scans obtained in voxel for three-dimensional analyses which allows the determination of the values of radiological density. [ 14 ] In this Meta-analysis, CBCT was used as a tool in 2 studies i.e., by Cesar Augusto Pereira OLIVEIRA[ 15 ] and Samia M. Elsherief.…”

“…Cesar Augusto Pereira OLIVEIRA et al . (2009)[ 15 ] analyzed the apical third of curved roots after mechanical preparations with different rotary systems and Samia M. Elsherief et al . (2013)[ 10 ] analyzed the curved root canals with three different nickel titanium rotary instruments after mechanical preparation.…”