Abstract
The aim of this study was to evaluate ex vivo the sealing achieved at simulated lateral canals (SLC) and the quality of filling according to their position in the root canal after using the same filling technique. SLC were created at three levels in 55 teeth and divided into two groups depending on the root canal sealer used (1: BioRoot® RCS, 2: GuttaFlow® bioseal). They filled them with the continuous wave technique and submitted to a diaphanization technique. The samples were analyzed using a magnifying lens (20×), pictures were taken, which proceeded to linear measurement with the ImageJ® program and used a filling score system with five grades (0 to 4, 0 and 1 not acceptable, 2 to 4 acceptable); BioRoot® RCS has got a greater proportion than GuttaFlow® bioseal for SLC filled acceptably at 10 mm from the apex (p < 0.05). The highest proportion of SLC filled acceptably was found in the middle third (6 mm) (p < 0.05), followed by the apical third (3 mm) and the coronal third (10 mm). The difference between apical and coronal third could be significant; BioRoot® RCS has been better than GuttaFlow® bioseal for filling SLC in the coronal third of the teeth. Studies on the characteristics of these cements are missing to explain these differences.
Highlights
Endodontic obturation is an essential step in endodontic treatment; it is aimed at sealing the root canal system, preventing future bacterial contamination or recontamination [1]
The presence of lateral canals represents a two-way path between the root canal and the periradicular tissues, which facilitates the passage of bacteria and their products [3]
Of the total of the simulated lateral canals (SLC), 25% have been filled in an Acceptable way and cement extrusion was found in 10.4% of the studied teeth
Summary
Endodontic obturation is an essential step in endodontic treatment; it is aimed at sealing the root canal system, preventing future bacterial contamination or recontamination [1]. For the success of endodontic treatment, it is important to achieve a filling that fully occupies the anatomy of the instrumented root canal. In this sense, the obturation of the lateral and/or accessory canals could play a significant role [2]. Lateral canals are formed by the entrapment of periodontal vessels in Hertwig’s epithelial sheath during root calcification [4]. The root canal system presents a complex anatomy, in which a significant percentage of lateral and/or accessory canals are observed, distributed according to the different root zones. De Deus et al [5] found 27.4% of lateral canals with a distribution of 17% in the apical third, 8.8% in the middle and 1.6% in the coronary
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