The influence of calcium hydroxide on adaptation and root canal penetration in teeth filled with methacrylate-based resin sealer

Abstract

The aim of this study was to evaluate, by confocal laser scanning microscopy (CLSM), the effect of Ca(OH) 2 dressing on the depth of dentinal tubule sealer penetration and the percentage of sealer-dentin adaptation in the coronal, middle, and apical thirds of teeth filled with methacrylate-based resin sealer (Epiphany). Methods: A total of 30 extracted single-rooted human mandibular incisors were instrumented up to file #40.04 (ProFile), with 1.0% NaOCl as irrigating solution. The teeth were randomly divided into three groups (n = 10): GI = no Ca(OH) 2 dressing (control group); GII = Ca(OH) 2 for 14 days + removal with saline solution and #40 K-file; and GIII = similar to Group II plus 17% EDTA for dressing removal. The Epiphany sealer was labeled with Rhodamine B dye, and all canals were filled with the Epiphany system. Three sections of each tooth were sectioned and viewed under 5X and 40X magnifications. Results: ANOVA and Tukey tests showed significantly lower values of sealer penetration depth in the apical third compared to the middle and coronal thirds (p < 0.05). The deepest sealer penetration was observed in the coronal and middle thirds of Group II. Groups II (93%) and III (86%) had the highest percentage of adaptation compared with Group I (78%) (p < 0.05). Conclusions: Ca(OH) 2 favors the depth of methacrylate-based sealer penetration and the percentage of sealer-dentin adaptation in teeth filled with the Epiphany system.

Confocal laser scanning microscopic analysis of the penetration of an epoxy resin‐based sealer into dentinal tubules after calcium hydroxide dressing

“…Camargo et al . (8) confirmed that the remaining calcium hydroxide can penetrate the dentinal tubules together with the sealer. In addition, Yassen et al .…”

“…Porkaew et al (22) reported that the residual calcium hydroxide can reach the dentinal tubules, decreasing the dentin permeability. Camargo et al (8) confirmed that the remaining calcium hydroxide can penetrate the dentinal tubules together with the sealer. In addition, Yassen et al (23) observed that intracanal dressing with calcium hydroxide reduces dentin wettability.…”

“…The endodontic sealer was mixed with rhodamine B dye before evaluation under confocal laser scanning microscope. This dye has been used in various studies evaluating sealer penetration into dentinal tubules (8,13,16,17,19). However, Wang et al .…”

Influencia de la medicación intracanal con pasta de hidróxido de calcio en la penetración del cemento obturador

“…Adicionalmente, la penetración del sellador en los túbulos dentinarios es indispensable para mejorar la adaptación y retención del cemento sellador y actuar como una barrera física en las irregularidades, túbulos dentinarios y canales laterales evitando el ingreso de microorganismos dentro de los túbulos dentinarios 7,8 . El cemento sellador…”

“…Additionally, the penetration of the sealant in the dentinal tubules is essential to improve the adaptation and retention of the sealant cement and act as a physical barrier in the irregularities, dentinal tubules and lateral channels avoiding the entry of microorganisms into the dentinal tubules 7,8 . Ah plus sealant cement (Dentsply Maillefer, Ballaigues, Switzerland) has excellent physicochemical properties that have been widely studied, which is why it is considered a gold standard to evaluate new cements [9][10][11] .…”