Published in:
01-12-2024 | Diode Laser | Original Article
Microshear bond strength of adhesive interface in c-phycocyanin treated coronal and radicular dentin surfaces: comparative in vitro study
Authors:
Nawal Aidaros, Heba Badra, Reem Ashraf
Published in:
Lasers in Dental Science
|
Issue 1/2024
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Abstract
Purpose
The study aimed to compare microshear bond strength of self-etch adhesive and resin cement to coronal and radicular dentin, respectively, after disinfection with two modalities using photodynamic therapy (c-phycocyanin) and chlorohexidine.
Methods
Premolar teeth extracted for orthodontic reasons (n = 48) were used. Twenty-four premolars were sectioned parallel to the occlusal surface above cemento-enamel junction to expose coronal dentin (group 1). While in (group 2), they were sectioned parallel to the occlusal surface below CEJ to expose radicular dentin. Each group was further subdivided into three groups (n = 8) according to the disinfection protocol: group A = (control group), group P = dentin disinfected with c-phycocyanin, and group C = dentin disinfected with chlorohexidine. After disinfection, flowable resin composite was bonded to coronal dentin using one step self-etch adhesive, and self-adhesive resin cement was bonded to radicular dentin. Microshear bond strength was then evaluated.
Results
Coronal dentin (group 1) has shown no significant difference between groups (1A and 1C), but both were significantly higher than group 1P. Regarding radicular dentin (group 2), both groups (2C and 2P) showed no statistical difference when compared to group 2A.
Conclusions
Coronal dentin disinfection with chlorhexidine did not affect its bond strength; however, c-phycocyanin irradiated with diode laser (aPDT) negatively affected the bond strength of coronal dentin to self-etch adhesive. Radicular dentin disinfection with chlorhexidine significantly increased its bond strength. C-phycocyanin irradiated with diode laser did not significantly affect the bond strength of radicular dentin.