Dept. of Conservative & Endodontics, K. M. Shah Dental College and Hospital, PIPARIA-391760, Dist- Vadodara (Guj., India)
*Corresponding Address: Dr. Vaishali Parekh, Professor & HOD, Dept. of Conservative & Endodontics, K. M. Shah Dental College and Hospital, Sumandeep Vidyapeeth, Piparia-391760, Vadodara
Online published on 29 April, 2013.
The aim of this study was to Compare and evaluate the efficacy of Pro-taper retreatment and hand instrumentation for gutta-percha removal. and evaluate the most effective system in guttapercha removal from root canal system.
Thirty extracted human maxillary anterior teeth were collected for this study. The teeth with single straight canal and size of apical foramen not greater than no. 15 –K file will be selected for standardisation of the study.
Modified step back flare technique is used. i.e. Flaring the cervical third with GG 1–3 (Dentsply Maillefer). Cleaning and shaping were carried out by sequential use of K-files upto size 30,followed by step back procedure in 1mm increment to a file size of 50. A working length 15mm was established by removing the coronal portion of the tooth in all samples.
Teeth were obturated with GP and AH-Plus sealer and cold lateral compaction method and stored at room temperature for 30 days
Teeth were randomly divided into three groups. Three different groups were taken-Group (A): Hedstrom files, Group (B): Pro-Taper retreatment files, Group (C): Control group.
Teeth were rendered transparent by Decalcification in 5% nitric acid for 7 days, dehydration in ethanol 85%, 90%, 99%, successively for 12 hrs, 1hr, & 3hrs respectively. Then the teeth were cleared using methyl salicyclate solution. The specimens are observed under Stereomicroscope (at 10x magnification) and photographs are taken
The statistical analysis was done by using Non - Parametric Mann-Whitney Test (for comparison of two independent groups) and Non - Parametric Wilcoxon Signed Ranks Test (for comparison of two related groups).There was no statistical difference found between both the group A and group B.
The current findings indicate all instruments used in the present study, Pro-taper retreatment files and H- files, left some filling material inside the root canal. There were no significant differences were found between all tested groups Pro-taper retreatment files and H- files.
Xylene, Retreatment, H-file, Protaper, Clearing technique
