Year : 2019

Volume : Volume 10

Issue : Issue 3

Address for correspondence :
Dr. Buggaveeti Pradeep Kumar.
BuggaveetiPradeepKumar@gmail.com

Abstract

Background: Objective in root canal preparation is to develop a shape that tapers from apical to coronal, maintaining the original canal shape. With advent of instruments manufactured from nickel-titanium (NiTi) alloys, there was a significant improvement of quality of root canal shaping, with predictable results and less iatrogenic damage. Hence; the present study was undertaken for comparing the removal of root canal dentin and apical transportation with two different rotary systems. Material and methods: 60 freshly extracted single rooted premolars teeth were collected and stored in normal saline. The length of all sample teeth were standardised to 19 mm by carrying out coronation of each sample if required. A CBCT of each sample tooth was taken as a pretreatment record. The sample teeth were then categorised into two groups based on the file system used for their instrumentation. A post canal preparation CBCT was carried out to compare differences with the pretreatment status. Three different levels were selected to compare the canal transportation, and Remaining Dentine Thickness (RDT) at 4mm, 8mm and 12mm from the root apex. Canal transportation at these landmarks was evaluated. The value of remaining dentine thickness was obtained by calculating the difference between the un-instrumented and instrumented dentine. Results: The mean and standard deviation at the first reference point for group 1 file system was .03 and .06 respectively. The mean and standard deviation at the first reference point for group 2 file system was .08 and .10 respectively. The mean and standard deviation at the second reference point for group 1 file system was .06 and .05 respectively. The mean and standard deviation at the second reference point for group 2 file system was .14 and .11 respectively. The mean and standard deviation at the third reference point for group 1 file system was .04 and .10 respectively. The mean and standard deviation at the third reference point for group 2 file system was .07 and .13 respectively. A statistically significant difference was observed in the canal transportation values
in group 1 at point 4mm and 8mm from the apex. At point 12mm from the apex, group 1 showed non-significant variation. Group 2 on the other hand did not show statistically different figures at all the three reference points. The remaining dentin thickness value at all the three reference point was non-significant statistically.