Comparative evaluation of the efficacy of three methods of delivering calcium hydroxide into the root canal

Abstract

Background. Calcium hydroxide, due to its favorable properties, such as an antimicrobial effect as well as its ability to dissolve necrotic tissues, inhibit tooth resorption and stimulate the formation of a hard tissue barrier, is widely used in root canal treatment. Objectives. The objective of this study was to compare the efficacy of 3 methods of delivery of calcium hydroxide into the canals. Material and methods. This in vitro experimental study was performed on acrylic resin blocks with simulated curved canals (curvature of 24° and 44°). Calcium hydroxide was delivered into the canals with 3 different instruments : a hand file, a Lentulo and a rotary file. The data was analyzed using the three-way analysis of variance (ANOVA) and Tukey's test. Results. The density of calcium hydroxide was significantly different among the 3 groups (p < 0.001). The manual delivery technique resulted in the lowest and using a rotary file in the highest density of calcium hydroxide (p < 0.001). The mean density of calcium hydroxide was significantly higher in the canals with curvature of 24°, irrespective of the delivery method (p < 0.001). The lowest mean density of calcium hydroxide was noted at 1 mm and 3 mm from the apex, whereas the highest mean density was noted at 11 mm from the apex, irrespective of delivery method (p < 0.001). Conclusions. A rotary file seems to be the most efficient instrument for delivering calcium hydroxide into the canals, especially into the apical region of canals with greater curvature.

Micro-computed tomography analysis of calcium hydroxide delivery efficacy in C-shaped canal system of mandibular second molars

“…This finding broadly supports the work of Rahde et al, who reported that the curvature did not influence the filling quality of Ca(OH) 2 into extracted human teeth [ 20 ]. However, conflicting results were reported by Sharifi et al, who found that the curvature affected the density of Ca(OH) 2 [ 9 ]. An explanation for this disparity could be the differences in experimental specimens.…”

“…An explanation for this disparity could be the differences in experimental specimens. Sharifi et al used simulated canals in resin block to assess the effect of the canal curvature while Rahde used extracted human first molars and single-rooted teeth [ 9 , 20 ].…”

“…However, the quality of Ca(OH) 2 placement may depend on canal morphology, instruments, materials, and the delivery technique [8,9]. Various techniques for intracanal placement of Ca(OH) 2 have been advocated before [8,[10][11][12][13][14][15].…”

“…The morphology and complexities of the canal system can also influence the effectiveness of intracanal medicament placement [9]. Mandibular second molars with C-shaped canal configurations are especially commonly found in east Asia [16][17][18].…”

Cone Beam Computed Tomography Analysis of Three Method of Intracanal Calcium Hydroxide Placement

“…10 Several method have been employed for intra-canal Ca(OH) 2 placement, however, none of the studies have assessed method of placement three-dimensionally. [11][12][13][14][15][16][17][18][19][20] Hence, this study aimed to compare and evaluate the quality of three different method of intracanal placement of calcium hydroxide paste through CBCT.…”