Original Research Article
Year: 2021 | Month: April | Volume: 11 | Issue: 4 | Pages: 272-287
DOI: https://doi.org/10.52403/ijhsr.20210432
Permeability of Modified Dentinal Surfaces
Manar M Abu Nawaregab, Ola I Fahmyc, Gihan A Abdel Rahmanb, Ahmed Z Zidande, Nour A Habibb
a Department of Restorative Dentistry, Biomaterials Division, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
b Biomaterials Department, Faculty of Oral and Dental Medicine, Cairo University, Egypt
c Department of Operative Dentistry, Faculty of Dentistry, Misr International University, Egypt
d Department of Restorative Dentistry, Biomaterials Division, Faculty of Dentistry, Umm Al-Qura University, Mekkah, Saudi Arabia
e Biomaterials Department, Faculty of Dentistry, University of Moderrn Sciences and Arts (MSA), Egypt
Corresponding Author: Manar M Abu Nawareg
ABSTRACT
Objectives: The aim of this study was to investigate the sealing ability of three adhesives bonded to modified dentinal surfaces after short and long storage periods.
Methods: Three adhesives were used in this study; two-step etch-and-rinse “Adper Single Bond 2”, two-step self-etch “AdheSE” and one-step self-etch “G-Bond” adhesives. Modifications of the dentinal surface was performed by application of adhesives after oxalate application, application of adhesive after oxalate application to sodium hypochlorite (NaOCl)-deproteinized dentinal surface, compared to control groups (application of adhesive without any surface pretreatment). Dentinal sealing was investigated by measuring dentin permeability, using a fluid transport apparatus, after two storage periods; 24 hours and 2 months.
Results: After 24 hours, the control group bonded with “Adper Single Bond 2” without any surface treatment had the highest permeability (25.3%) followed by “G-Bond” (16.2%) and finally “AdheSE” (11%). Significant reductions in permeability values were observed on application of oxalate in conjunction with both “Adper Single Bond 2” and “AdheSE” (11.7% and 2.6% respectively). Further significant reductions in permeability values of those two adhesives were noted when the combined NaOCl and oxalate pretreatments were used (5.7% and 0.8% respectively). Permeability means for all groups increased after storage for 2 months.
Conclusions: Dentin surface deproteinization plus oxalate application produced the best dentin sealing for two step adhesives.
Key words: Etch-and-rinse adhesives, self-etching adhesives, oxalate-desensitizing agent, NaOCl-deproteinizing agent, dentin permeability.