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Indian Journal of Mednodent and Allied Sciences
Year : 2017, Volume : 5, Issue : 2
First page : ( 115) Last page : ( 120)
Print ISSN : 2347-6192. Online ISSN : 2347-6206.
Article DOI : 10.5958/2347-6206.2017.00019.X

Sealing Ability of Gutta-percha in Apical Area and Degree of Tugback Sensation after Root Canal Preparation-In Vitro Study

Satyanarayana Ashok1,*, Kaur Gagan Deep2,**, Kumar M. Naveen3

1Professor, Department of Periodontics, S.B. Dental College and Hospital, Bidar, Karnataka, India

2Reader, Department of Pedodontics, College of Dental Science, Amarghad, Gujarat, India

3Professor, Department of Oral Pathology, College of Dental Science, Amarghad, Gujarat, India

*(Corresponding author) email id: sujalmdp@gmail.com

** drgagan03@gmail.com

Online published on 25 September, 2017.



The aim of this study was to evaluate the degree of tug-back after root canal preparation with respect to the gutta-percha-occupied area (GPOA).

Materials and Methods

Roots of 50 mandibular premolar teeth were prepared till size 35/0.04, then gutta-percha (GP) cones of same size and taper were adapted to root canals, and the degree of tug-back sensation was scored as loose, slight, adequate and strong. Root canals were filled with GP and AH26 sealer, and then sectioned horizontally 1 mm from the apical end at three levels. GPOA and its sum from the three levels sum of GPOA (sGPOA%) were calculated using stereomicroscope.

Statistical Analysis

At each sectioned level, GPOA% was compared with the score of tug-back sensation using one-way ANOVA [Analysis of variance] at a 5% significance level. Multiple pair wise comparisons were performed using Tukey test.


Tug-back sensation was present in all canals, described as slight, adequate and strong in 4, 8 and 8 canals, respectively. Among the tug-back scores, quantitative analyses of GPOA% showed significant differences at 1-and 2-mm levels. The strong tug-back with sGPOA of 76.5 ± 11.1% was significantly higher than that of slight tug-back.


Under the conditions of this study, the tug-back scoring system can be applied to determine the amount of GP adaptation inside the root canal.



Gutta-Percha adaptation, Gutta-Percha-Occupied area, Tug-Back, Distance, Root canal obturation, Apical, Turkey test, Mandibular premolar teeth.


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