Comparison of Push-out Bond Strength of Gutta-percha to Root Canal Dentin in Single-cone and Cold Lateral Compaction Techniques with AH Plus Sealer in Mandibular Premolars

Abstract

Background and aims. The single-cone technique has gained some popularity in some European countries. The aim of the present study was to compare the push-out bond strength of gutta-percha to root canal dentin with the single-cone and cold lateral compaction canal obturation techniques.Materials and methods. The root canals of 58 human mandibular premolars were prepared using modified crown-down technique with ProTaper rotary files up to #F3as a master apical file (MAF) and divided randomly into groups A and B based on canal obturation technique. In group A (n = 29) the root canals were obturated with single-cone technique with #F3(30/.09) ProTaper gutta-percha, which was matched with MAF in relation to diameter, taper and manufacturer; in group B (n = 29) the canals were obturated with gutta-percha using cold lateral compaction technique. In both groups AH plus sealer were used. After two weeks of incubation, three 2-mm slices were prepared at a distance of 2 mm from the coronal surface and push-out test was carried out. Data were analyzed with descriptive statistics using independent samples t-test.Results. There were statistically significant differences between two groups. The mean push-out bond strength was higher in group B (lateral compaction technique) compared to group A (single-cone technique; P < 0.05).Conclusion. Use of single-cone technique for obturation of root canals resulted in a lower bond strength compared to cold lateral compaction technique.

Effect of photodynamic therapy and non-thermal plasma on root canal filling: analysis of adhesion and sealer penetration

“…Bitter, et al 5 (2009) associated rhodamine with cements and observed that bond strength values were not affected by rhodamine, values were similar to those reported in the literature. The same occurred in the present study, bond strength values found here were similar to those reported in the literature 4 , 14 .…”

“…Each root was horizontally sectioned with a slow-speed water-cooled diamond saw (Buehler Isomet 2000, Lake Bluff, IL, USA) at 4, 8, and 12 mm from the apex 14 to produce 1-mm thick slices for each root region (apical, middle, and coronal).…”

Quantification of the tug-back by measuring the pulling force and micro computed tomographic evaluation

“…Various experimental methods have been used to assess the quality of root canal sealing, such as fluid filtration [ 1 ], bond strength test [ 21 22 ], photo-micrographic analysis [ 2 5 16 23 24 25 ] and µCT imaging [ 4 13 26 27 ]. Above all, µCT imaging and stereoscopic microscopic methods allow the assessment of cross-sectional images of the space occupied by GP, sealer, and void.…”

Bond strength and solubility of a novel polydimethylsiloxane-gutta-percha calcium silicate-containing root canal sealer

“…This technique has limitations, which include the following: poor adaptation of gutta-percha to the canal walls, spaces between gutta-percha and the sealer, and the presence of a large amount of the sealer in the apical region due to the inhomogeneous gutta-percha-sealer mass. 17 To help to overcome these limitations, the technique used in this study was the single-cone technique. A single gutta-percha master cone placed with a sealer provides a final compact mass without spaces.…”

“…18 Ideal adhesion of the root canal filling material to the root dentin is one of the main criteria in evaluating the clinical efficacy of the obturation technique. 17 It helps to maintain the integrity of the dentin-sealer interface by resisting dislodgment and ensuring the proper function of the restored tooth. 4 The adhesion of the obturating material to the dentin walls is evaluated using bond strength testing.…”