Main and Accessory Canal Filling Quality of a Premixed Calcium Silicate Endodontic Sealer According to Different Obturation Techniques

Su-Yeon Ko; Hae Won Choi; E-Deun Jeong; Vinicius Rosa; Yun-Chan Hwang; Mi-Kyung Yu; Kyung-San Min

doi:10.3390/ma13194389

Main and Accessory Canal Filling Quality of a Premixed Calcium Silicate Endodontic Sealer According to Different Obturation Techniques

Materials (Basel). 2020 Oct 1;13(19):4389. doi: 10.3390/ma13194389.

Authors

Su-Yeon Ko¹, Hae Won Choi^{2

3}, E-Deun Jeong¹, Vinicius Rosa⁴, Yun-Chan Hwang⁵, Mi-Kyung Yu^{1

6

7}, Kyung-San Min^{1

6

7}

Affiliations

¹ Department of Conservative Dentistry, School of Dentistry and Institute of Oral Bioscience, Jeonbuk National University, Jeonju 54896, Korea.
² Department of Dental Biomaterials Science, School of Dentistry, Seoul National University, Seoul 03080, Korea.
³ Department of Orthodontics, The Institute of Oral Health Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Korea.
⁴ Discipline of Oral Sciences, Faculty of Dentistry, National University of Singapore, Singapore 119085, Singapore.
⁵ Department of Conservative Dentistry, School of Dentistry, Chonnam National University, Gwangju 61186, Korea.
⁶ Research Institute of Clinical Medicine of Jeonbuk National University, Jeonju 54907, Korea.
⁷ Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju 54907, Korea.

Abstract

The present study aimed to investigate the effects of different obturation techniques on the main and accessory canal filling quality of a premixed calcium silicate endodontic sealer (Endoseal TCS). We also highlighted the validity of the methods used for evaluating the canal filling quality. Thirty single-rooted premolars were used for the main canal filling and 75 were used for accessory canal filling. The canals were instrumented and randomly divided into three groups according to the filling techniques: (1) single-cone technique (SC), (2) single-cone with ultrasonic activation (SU), and (3) warm vertical compaction (WV). Voids in relation to the root canal fillings were assessed using cross-section images from microcomputed tomography (μCT) scans or transversely sectioned tooth specimens (n = 10). After demineralization and clearing of the teeth, the incidence, number, and completeness of the accessory canal fillings were evaluated (n = 25). One-way analysis of variance (ANOVA) and Tukey's post hoc test was used for the evaluation of the voids in the main root canal and the incidence and number of filled accessory canals. Pearson's chi-squared (χ²) test was used for the evaluation of the filling completeness (α = 0.05). In the stereomicroscopic evaluation of the sectioned specimen, the SC group had significantly higher void occurrence than the other groups (p < 0.05), although there was no difference between groups in the μCT evaluation. However, there was no difference between the SU and WV. There was no difference between all the groups regarding the incidence, number, and completeness of the accessory canal fillings. When the premixed calcium silicate sealer is used with SC, the ultrasonic activation is recommended to obtain a better main canal filling quality. In contrast, the obturation techniques did not affect the accessory canal filling. We also recommend using the sectioning method when the void formation in the root canal filling materials is evaluated.

Keywords: accessory; calcium silicate; canal; endodontic; sealer; ultrasonic.

Abstract

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