Influence of Sodium Ascorbate on Microtensile Bond Strengths to Pulp Chamber Dentin treated with NaOCl.
10.5395/JKACD.2008.33.6.545
- Author:
Soo Yeon JEON
1
;
Kwang Won LEE
;
Mi Kyung YU
Author Information
1. Department of Conservative Dentistry, School of Dentistry, Chonbuk National University, Korea. mkyou102@hanmail.net
- Publication Type:Original Article
- Keywords:
Microtensile bond strengths;
NaOCl;
Pulp chamber dentin;
Sodium ascorbate;
Total etching adhesive system
- MeSH:
Adhesives;
Ascorbic Acid;
Bisphenol A-Glycidyl Methacrylate;
Dental Pulp Cavity;
Dentin;
Humans;
Humidity;
Molar;
Sodium;
Water
- From:Journal of Korean Academy of Conservative Dentistry
2008;33(6):545-552
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study was to evaluate the influence of sodium ascorbate on microtensile bond strengths of total-etching adhesive system to pulp chamber dentin treated with NaOCl. Pulp chambers of extracted human non-caries permanent molars were treated as follows: group 1, with 0.9% NaCl; group 2, with 5.25% NaOCl; group 3, with 5.25% NaOCl and 10% sodium ascorbate for 1min; group 4, with 5.25% NaOCl and 10% sodium ascorbate for 1 min and 10ml of water; group 5, with 5.25% NaOCl and 10% sodium ascorbate for 5 min; group 6, with 5.25% NaOCl and 10% sodium ascorbate for 5 min and 10ml of water; group 7, with 5.25% NaOCl and 10% sodium ascorbate for 10 min; group 8, with 5.25% NaOCl and 10% sodium ascorbate for 10 min and 10ml of water. Treated specimens were dried, bonded with a total-etching adhesive system (Single bond), restored with a composite resin(Z250) and kept for 24h at 100% humidity to measure the microtensile bond strength. NaOCl-treated group (group 2) demonstrated significantly lower strength than the other groups. No significant difference in microtensile bond strengths was found between NaCl-treated group (group 1) and sodium ascorbate-treated groups (group 3-8). The results of this study indicated that dentin treated with NaOCl reduced the microtensile bond strength of Single bond. Application of 10% sodium ascorbate restored the bond strength of Single bond on NaOCl-treated dentin. Application time of sodium ascorbate did not have a significant effect.
