Abstract
ABSTRACTObjectives:To evaluate the effect of Rose Bengal (RB), methylene blue (MB) and curcumin used as a canal disinfectant on the extrusion bond strength (EBS) of FRCP (fiber reinforced composite resin) with canal dentin.Methods:The present invitro study was completed in 90 days approved by Riyadh Elm University. Forty premolars were extracted disinfected and decoronated. Mechanochemical preparation was done of canal space using 10k file widening canals sequentially with a 25K file with constant saline irrigation. Canal was dried condensed with gutta percha and sealer. Post space was prepared using peso reamer. Based on canal disinfection samples were divided into four groups. Group-1 MBP+17%EDTA, Group-2 RBP +17%EDTA, Group-3 Curcumin+17%EDTA and Group-4 5.25% NaOCl +17% EDTA. Following disinfection, the canal space of all specimens was washed with 17% EDTA for 120 sec. Post was cemented in canal space and cured. Specimens were placed on Universal testing machine (UTM) for EBS. The type of bond failure was evaluated using stereomicroscope. ANOVA and Tukey multiple comparison test was used to compare means.Results:Cervical third of Group-3 in which samples were disinfected with CP+17% EDTA displayed the maximum EBS (8.69±1.32 MPa). Whereas, the lowest EBS (3.30±0.54 MPa) was exhibited by the apical third of Group-4, where 5.25% NaOCl +17% EDTA was used as a canal disinfectant. The intragroup comparison demonstrated a declining trend of EBS from cervical to apical third in all investigated groups.Conclusion:Root canal dentin treated with different PS (MBP, CP, and RBP) demonstrated better EBS than the conventional disinfecting regime (NaOCl +17% EDTA). CP and RBP displayed better EBS than MBP
Highlights
The prosthetic or restorative rehabilitation of root-treated teeth usually requires placement of post due to excessive compromise in clinical tooth structure.[1]
It was observed that the cervical third of Group-3 in which samples were disinfected with Curcumin Photosensitizer (CP)+17% ethylenediaminetetraacetic acid (EDTA) displayed the maximum extrusion bond strength (EBS) (8.69±1.32 Mega Pascal (MPa))
The lowest EBS (3.30±0.54 MPa) was exhibited by the apical third of Group-4, where 5.25% NaOCl +17% EDTA was used as a canal disinfectant
Summary
The prosthetic or restorative rehabilitation of root-treated teeth usually requires placement of post due to excessive compromise in clinical tooth structure.[1]. Pak J Med Sci January - February 2022 Vol 38 No 1 www.pjms.org.pk 34 post adhesive system which results in long-term clinical success.[3] Among various factors affecting FRCP in the canal space, the type and concentration of chemical disinfectant largely impact extrusion bond strength (EBS). Among the various chemical irrigants used in dentistry, sodium hypochlorite (NaOCl) had gained widespread popularity due to its antimicrobial effectiveness, tissue dissolving properties, and lubrication.[4] It possesses low viscosity which allows easy introduction and penetration into the canal space along with adequate shelf life and cost-effectiveness.[5] existing literature advocates that NaOCl is unable to remove the inorganic component of the smear layer which barricades adhesion of bonded restorations.[6] it displays concentration-dependent cytotoxicity.[7] the use of chelator i.e., ethylenediaminetetraacetic acid (EDTA), and a mixture of doxycycline, acid, and detergent (MTAD) is being recommended as a final canal disinfectant after NaOCl to achieve complete smear layer removal. Chemical irrigation contributes to bacterial load reduction yet does not disinfect the canal.[7]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
