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http://dx.doi.org/10.5395/JKACD.2008.33.6.545

INFLUENCE OF SODIUM ASCORBATE ON MICROTENSILE BOND STRENGTHS TO PULP CHAMBER DENTIN TREATED WITH NAOCL  

Jeon, Soo-Yeon (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University)
Lee, Kwang-Won (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University)
Yu, Mi-Kyung (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University)
Publication Information
Restorative Dentistry and Endodontics / v.33, no.6, 2008 , pp. 545-552 More about this Journal
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 ascorbatetreated 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.
Keywords
Microtensile bond strengths; NaOCl; Pulp chamber dentin; Sodium ascorbate; Total etching adhesive system;
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Times Cited By KSCI : 1  (Citation Analysis)
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