Influence of obturation technique on penetration depth and adaptation of a bioceramic root canal sealer

Abstract

Aim: Evaluation of the impact of three different obturation techniques on the penetration depth and adaptation of a bioceramic root canal sealer(BioRoot RCS) to root dentin using scanning electron microscope and confocal laser scanning microscope. Materials and Methods: Recently extracted ninety mandibular premolar teeth of similar dimensions (±0.2 mm) with single canals and straight roots were segregated into three experimental groups ( n = 30 each) based on the method of obturation used, i.e., lateral compaction technique, warm vertical compaction technique, and injectable thermoplasticized technique. After obturation, half of the root samples ( n = 15) in each group were sectioned horizontally by hard tissue microtome at 3, 6, and 9 mm, respectively, from root apex for measuring sealer penetration depth with a confocal laser scanning microscope. Longitudinal sections of the samples ( n = 15) were used for measuring the adaptation of sealers to radicular dentin using a scanning electron microscope. Statistical Analysis: Intergroup comparison of sealer penetration depth and adaptation to root dentin was analyzed using one-way ANOVA, and pairwise comparisons were made using Tukey's post hoc test. Results: Warm vertical condensation technique showed deeper root dentin penetration of the sealer. Better adaptation of the sealer to apical root dentin with minimal voids ( P ≤ 0.05) was achieved with warm vertical condensation in comparison to the injectable gutta-percha method and lateral condensation obturating techniques. Conclusion: At all three root levels (coronal, middle, and apical), warm vertical condensation technique exhibited more sealer penetration with minimum gaps, whereas lateral condensation technique exhibited more gaps and less sealer penetration.

Assessment of different irrigation techniques on the penetration depth of different sealers into dentinal tubules by confocal laser scanning microscope: An in vitro comparative study

“…The successful outcome of endodontic treatment depends on the complete extirpation of infected pulp, adequate disinfection of the root canal system, and achieving a three-dimensional apical seal. [ 1 ] Challenges faced during instrumentation are the cleaning of the isthmus, the apical delta, and the smear layer which may consist of bacteria and their byproducts. [ 2 ] This layer further poses a challenge for the penetration of irrigants into the dentinal tubules.…”

Evaluation of cytotoxicity and adaptability of a novel bioceramic root canal sealer: An in vitro and scanning electron microscope study

“…The obturation method employed, along with the physical and chemical characteristics of the sealer, have a tremendous impact on how well the root canal sealer adapts to the dentinal walls and the gutta percha. [ 5 6 ] Therefore, proper evaluation of the adaptability of endodontic sealers is of utmost importance. Scanning electron microscopy offers advantages over other testing techniques, including the ability to view submicron defects at the required magnification and save microphotographs for final assessment.…”

Effectiveness of tricalcium silicate-based cements: Systematic review and meta-analysis

“…Furthermore, this sealer exhibits high bioactivity and can promote friction between the dentinal walls and the obturation material through the formation of a structure similar to that of biological hydroxyapatite. To the best of our knowledge, as of today , there is no consensus in the literature regarding the preferred root canal obturation technique to be employed when using tricalcium silicate-based sealers ( Dasari et al, 2020 ). The objective was to conduct a systematic review to assess whether calcium silicate cements exhibit greater intratubular penetration and sealing ability in warm or cold obturation techniques.…”