ABSTRACT
The purpose of this experimental study was to determine the diametric variations of a brand of handheld stainless-steel K-files, acquired from different countries, in accordance with the available standards. 20 Mani stainless-steel K-files of identical size [ISO#25] were acquired from Pakistan and were designated as Group A while 20 Mani K-files were purchased from London, UK and designated as Group B. Files were assessed using profile projector Nikon B 24V. Data was statistically compared with ISO 3630:1 and ADA 101 by one sample T test. Significant difference was found between Groups A and B. Average discrepancy of Group A fell within the tolerance limit while that of Group B exceeded the limit. Findings in this study call attention towards adherence to the dimensional standards of stainless-steel endodontic files
ABSTRACT
Objective of the study was to qualitatively determine and compare the fracture patterns of hand held stainless steel K files [Mani, Inc. Japan], acquired from Pakistan and United Kingdom. This study was conducted at the Institute of Space Technology, over a period of one month. A total of 40 stainless-steel K files [Mani, Inc. Japan] of identical size [ISO#25] were collected and divided into two groups, such that Group A consisted of 20 K files acquired from the Rawalpindi/ Islamabad region in Pakistan while Group B consisted of 20 K files that were purchased from London, UK. The files were fractured one by one, 3mm from the tip. The fractured surfaces were then observed under scanning electron microscope to determine their fracture patterns. Evaluation of the fractured surfaces revealed decreased ductility in Group A in comparison with Group B. Stainless steel endodontic files available commercially in Pakistan need evaluation of their fracture behavior for patient safety and benefit