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ORIGINAL ARTICLE
Year : 2016  |  Volume : 6  |  Issue : 3  |  Page : 131-135

Apical Gutta-percha cone adaptation and degree of tug-back sensation after canal preparation


1 Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences; King Abdullah International Medical Research Center (KAIMRC), National Guard Health Affairs, Riyadh, Saudi Arabia
2 Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences; King Abdullah International Medical Research Center (KAIMRC), National Guard Health Affairs, Riyadh, Saudi Arabia; Department of Conservative Dentistry, Jordan University of Science and Technology, Irbid, Jordan
3 King Abdullah International Medical Research Center (KAIMRC), National Guard Health Affairs; Department of Medical Education, College of Medicine, King Saud Bin Abdulaziz University for Health Sciences; Riyadh, Saudi Arabia
4 Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences; King Abdullah International Medical Research Center (KAIMRC), National Guard Health Affairs; Division of Endodontics, King Abdulaziz Medical City, National Guard Health Affairs, Riyadh, Saudi Arabia

Correspondence Address:
Ahmed Jamleh
College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, National Guard Health Affairs, P. O. Box 22490, Riyadh 11426
Saudi Arabia
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/1658-5984.189355

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Aims: The aim of this study was to investigate the degree of tug-back after canal preparation with respect to the Gutta-percha-occupied area (GPOA). Materials and Methods: Roots of twenty premolar teeth were prepared till size 35/0.04, then 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 digital stereomicroscope. Statistical Analysis: At each sectioned level, GPOA% was compared with the score of tug-back sensation using one-way ANOVA at a 5% significance level. Multiple pairwise comparisons were performed using Tukey test. Results: 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 2- and 3-mm levels. The strong tug-back with sGPOA of 76.5 ± 11.1% was significantly higher than that of slight tug-back. Conclusions: 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. Strong tug-back sensation showed the highest GP adaptation although at least one-fifth of the apical canal region was left unfilled.


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