Effect of three different photosensitizers in photodynamic therapy on bond strength of a calcium silicate‐based sealer to radicular dentin

Abstract

To evaluate the effect of the photodynamic therapy (PDT) using with different photosensitizers on the bond strength of BioRoot RCS (BR) to radicular dentin by comparing with AH Plus (AH). The shaped root canals of 80 human mandibular premolars were divided into four groups based on the final disinfection protocol: NaOCl/EDTA, PDT with methylene Blue (MB), PDT with curcumin (CUR) and PDT with toluidine blue O (TBO) (n = 20). Each group was randomly divided into two subgroups (n = 10), according to the endodontic sealer used for obturation (n = 10). The test of push‐out bond strength (PBS) was performed using an universal test machine. The data were analysed using ANOVA, Tukey post‐hoc, and independent sample t‐test (α = 0.05). MB‐BR group showed the highest PBS at the cervical level (p < 0.05). The selection of the photosensitizer in PDT influenced adhesion of root canal sealers to radicular dentin.

Dentin Bond Strength of Calcium Silicate-Based Materials: A Systematic Review of In Vitro Studies

“…Contrastingly, Khurana et al [31] and Kuden et al [32] concluded that EndoSequence BC and BioRoot RCS exhibited higher adhesion strengths than AH Plus. The routine use of NaOCl and EDTA, employed to dissolve organic and inorganic components, plays a role in this variation.…”

“…While NaOCl negatively affects resin cement adhesion, EDTA creates favorable conditions for resin infiltration by exposing dentin collagen. This sequential use of solutions may be effective for hydrophobic epoxy cements but may not be suitable for calcium silicate-based cement types [32]. Kuden et al [32] proposed exploring alternative methods like photodynamic therapy for root canal disinfection when using calcium silicate cements, as NaOCl/EDTA reduces adhesion to dentin [32].…”