Comparative evaluation of shaping ability of trunatomy and protaper gold files in curved canals using cone?beam computed tomography: An invitro study

Abstract

This study aimed to compare the canal transportation and canal centering ability in the preparation of curved root canals after instrumentation with TruNatomy (TN) (TN; Dentsply Sirona, Maillefer, Ballaigues, Switzerland) and ProTaper Gold (PG) (PG; Dentsply, Tulsa Dental Specialties, Tulsa, OK, USA) files using cone‑beam computed tomography (CBCT). 30 Single rooted extracted human teeth with root curvature ranging from 20-30° according to Schneider’s method were selected. Teeth with any visible cracks or fractures, calcifications, previous root canal treatments were excluded. The teeth were randomly assigned into two groups i.e. Group 1-TN and Group 2-PG (n = 15 each). The teeth were instrumented according to manufacturer’s guidelines for both the groups. Canals were scanned using a CBCT scanner before and after preparation to evaluate the transportation and centering ratio at 3 mm, 5 mm, and 7 mm from the apex. The data analysis was done using SPSS software and the test used was independent sample t test for comparison between the 2 groups.Data obtained suggested that TN group presented lesser canal transportation at the middle third of the root. The PG group showed better centering abitily at apical third of the root canal when both the groups were compared. TN resulted in less transportation than PG at the middle third, and PG showed better centering ability at the apical third. Overall, both systems safely prepared root canals, causing minimal errors.

Comparative evaluation of canal transportation and canal centering ability in oval canals with newer nickel–titanium rotary single file systems – A cone-beam computed tomography study

“…The OneCurve instrument which presented minimum canal transportation in the apical and coronal third, when evaluated in the mesiodistal direction, is produced from a C-wire using proprietary heat treatment with CM property, and is in the martensitic phase at canal temperature. [ 6 ] According to Singla et al .,[ 19 ] OneCurve being a single file system with S-shaped cross-section, has a smaller core area, thus showing greater flexibility and minimum transportation. OneCurve was found to preserve the canal shape better because it possesses unique asymmetrical cutting profile, with improved snake-like movement, thereby causing minimum transportation, while preserving the original canal shape.…”

“…Hence, there is a need for research, which is aimed at consolidating a safe instrumentation technique that promotes effective cleaning and shaping along with maintaining the original canal shape, without causing transportation, or loss of centricity. [ 6 ]…”

“…One such file system, TruNatomy claims to provide slim shaping instruments because of its geometry, regressive taper, and slim design. [ 6 ]…”

“…[ 3 ] Canal transportation is defined by the glossary of endodontic terms as the removal of canal wall structure on the outside curve in the apical half of the canal due to the tendency of files to restore themselves to their original linear shape during canal preparation, whereas the centering ratio, on the other hand, is a measure of the ability of the instrument to stay centered in the canal. [ 6 9 ] Smaller the ratio, the better the instrument will remain centered in the canal. [ 5 10 ]…”

Comparative Evaluation of Dentinal Crack After Root Canal Preparation Using TruNatomy, Neoendo Flex, and Neoendo Neohybrid Files: An In Vitro Study

“…Its smaller flute diameter of 0.8 mm reduces the risk of file separation compared to generic variable taper files. TruNatomy maintains structural integrity and offers increased resistance to cyclic fatigue [5].…”