Effect of natural antioxidants on bond strength recovery of resin‐modified glass ionomers to the NaOCl‐affected pulp chamber dentin. Issue 1 (15th December 2022)

• Record Type: Journal Article
• Authors: Shafiei, Fereshteh; Dehghani, Zahra; Tavangar, Maryam S.
• Is Part Of: Clinical and experimental dental research. Volume 9:Issue 1(2023)
• Page Start: 258
• Page End: 262
• Publication Date: 2022-12-15
• Subjects: antioxidants -- dental pulp cavity -- sodium hypochlorite; Dentistry -- Periodicals; Dentistry; Oral Medicine; Mouth Diseases; Dentistry; Periodicals; Periodicals; Fulltext; Internet Resources; Periodicals; 617.6
• DOI: 10.1002/cre2.697
• Languages: English
• ISSNs: 2057-4347

Abstract

Abstract: Objective: This study evaluated the effect of two natural antioxidants on the compromised bond strength of a resin‐modified glass ionomer (RMGI) to the sodium hypochlorite (NaOCl)‐affected pulp chamber dentin. Methods: Forty‐two sound third molars were split into halves. The exposed pulp chamber dentin was ground to provide the flat dentin surfaces and divided into seven groups ( n = 12), according to the solutions used for immersion: (1) Control, distilled water; (2) NaOCl, 5.25% NaOCl for 20 min; (3) NaOCl/Ethylenediaminetetraacetic acid (EDTA); 5.25% NaOCl for 20 min + 17% EDTA for 1 min; (4) NaOCl/TA, 5.25% NaOCl + 10% tanic acid (TA) for 5 min; (5) NaOCl/EDTA/TA, 5.25% NaOCl + 17% EDTA + 10% TA for 5 min; (6) NaOCl/PA, 5.25% NaOCl+ 10% proanthocyanidin for 5 min; and (7) NaOCl/EDTA/PA, 5.25% NaOCl+ 17% EDTA + 10% PA for 5 min. The RMGI was bonded on the treated dentin using a Tygon tube. After 24 h of storage, microshear bond strength (µSBS) was tested. Data in MPa were submitted to one‐way analysis of variance and Tamhane test. Results: NaOCl significantly decreased the µSBS; NaOCl/EDTA and NaOCl/TA significantly increased the µSBS, higher than the control group ( p < .05); and in the NaOCl/EDTA/TA group, the increased bond strength was at the level of the control group ( p > .05). NaOCl/PA and NaOCl/EDTA/PA and NaOCl groups had comparable µSBS. Conclusion: TA could be suggested to provide effective bonding of RMGI and immediate sealing of the pulp chamber dentin after NaOCl irrigation.