Influência de diferentes medicações intracanais na qualidade da obturação dos canais com cimento à base de biocerâmico: estudo por micro-CT

Abstract

Intracanal medication is a widely used resource in endodontic therapy aimed at reducing the microbial load and promoting favorable conditions for root canal obturation. However, residues of these medications may remain adhered to the canal walls even after removal protocols, potentially interfering with the adaptation of the obturation material. Therefore, the present study aimed to evaluate, by means of micro–computed tomography (micro-CT), the quality of root canal obturation using a bioceramic sealer following the use of different intracanal medications. Twenty-four single-rooted mandibular premolars were selected, instrumented with the Reciproc R40 system, and divided into two groups (n = 12) according to the intracanal medication used: calcium hydroxide (IM-CH) and Bio-C Temp (IM-BIO). After 14 days, the medications were removed using ultrasonic irrigation, and the canals were obturated with AH Plus Bioceramic sealer associated with a Reciproc R40 gutta-percha cone. The teeth were scanned by micro-CT after intracanal medication placement, after its removal, and after obturation, allowing three-dimensional analysis of canal volume, obturation material, and the presence of voids. The results demonstrated no statistically significant difference between the groups regarding the percentage of remaining intracanal medication after the removal protocol, as well as with respect to the presence of voids after obturation (p > 0.05). It can be concluded that, under the experimental conditions of this study, the different intracanal medications evaluated did not influence the quality of root canal obturation when AH Plus Bioceramic sealer was used.