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. 2023 Jun;57(2):155-166.
doi: 10.15644/asc57/2/6.

Different Dentin Conditioning Protocols on Bond Strength of a Bioceramic Root Canal Filling

Elif Çiftçioğlu  1 , Güher Barut  2 , Vasfiye Işık  3 , Burçin Arıcan  4 , Işıl Karagöz-Küçükay  1
Affiliations

Different Dentin Conditioning Protocols on Bond Strength of a Bioceramic Root Canal Filling

Elif Çiftçioğlu et al. Acta Stomatol Croat. 2023 Jun.

Abstract

Objective: Bioceramic-based sealers, in combination with bioceramic-coated gutta-perchas, have become more commonly used in root canal obturation. The present study aimed to assess the influence of laser-assisted dentin conditioning compared with conventional conditioning protocols on the push-out bond strength (PBS) of a bioceramic-based root canal filling.

Material and methods: Sixty extracted mandibular premolars with one root canal were instrumented with EndoSequence rotary files up to size 40/0.04. Four types of dentin conditioning protocols were used: 1) 5.25% NaOCl (control), 2) 17% EDTA+5.25% NaOCl, 3) Diode laser-agitated 17% EDTA+5.25% NaOCl, 4) Er,Cr:YSGG laser irradiation+5.25% NaOCl. Teeth were obturated using the single-cone technique with EndoSequence BC sealer+BC points (EBCF). After having obtained 1-mm-thick horizontal slices from the apical, middle and coronal root thirds, push-out test was carried out, and failure modes were determined. The data were analyzed by two-way analysis of variance and Tukey's test with a significance level of p<0.05.

Results: The apical segments showed the highest PBS in all groups (p<0.05). In the apical segments, EDTA+NaOCl and diode laser agitated EDTA increased the PBS compared to the control (p=0.0001) and Er, Cr: YSGG laser (p=0.011 and p=0.027, respectively) groups. Both laser-used groups revealed significantly higher PBS values in the middle and coronal segments than EDTA+NaOCl (p<0.05). The bond failure was predominantly cohesive without any significant difference among the groups (p>0.05).

Conclusions: Laser-assisted dentin conditioning had distinct effects on the PBS of the EBCF at different root segments. Although Er, Cr: YSGG was ineffective in the apical segments, generally, laser-assisted dentin conditioning affected PBS more favorably than conventional irrigation groups, with a more pronounced effect in the diode laser-agitated EDTA group.

Keywords: Bioceramic Root Canal Filling; Diode Laser; Er, Cr: YSGG laser, Bond Strength; Laser Therapy; MeSH Terms: Root Canal Obturation; Organically Modified Ceramics; Root Canal Filling Materials; Shear Strength.

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Conflict of interest statement

Conflict of interest The authors declare that they have no conflicts of interest.

Figures

Figure 1
Figure 1
Representative images of 1 mm thick disc-shaped slices obtained at 3–4, 6–7 and 9–10 mm from the apex (a), and the push-out test (b).
Figure 2
Figure 2
Representative images of the failure modes. (a-b) Adhesive failure. (c-d) Cohesive failure. (e-f) Mixed failure.
See this image and copyright information in PMC

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