Effect of additional coating of bonding resin on the microtensile bond strength of self-etching adhesives to dentin.
10.5395/JKACD.2006.31.2.103
- Author:
Moon Kyung JUNG
1
;
Byeong Hoon CHO
;
Ho Hyun SON
;
Chung Moon UM
;
Young Chul HAN
;
Sae Joon CHOUNG
Author Information
1. Department of Conservative Dentistry, School of Dentistry, Seoul National University, Seoul, Korea. chobh@snu.ac.kr
- Publication Type:Original Article
- Keywords:
Self-etching adhesive;
Microtensile bond strength test;
pH;
Intermediate layer;
Fracture mode
- MeSH:
Adhesives*;
Dentin*;
Hydrogen-Ion Concentration;
Incidence;
Oceans and Seas
- From:Journal of Korean Academy of Conservative Dentistry
2006;31(2):103-112
- CountryRepublic of Korea
- Language:English
-
Abstract:
This study investigated the hypothesis that the dentin bond strength of self-etching adhesive (SEA) might be improved by applying additional layer of bonding resin that might alleviate the pH difference between the SEA and the restorative composite resin. Two SEAs were used in this study; Experimental SEA (Exp, pH: 1.96) and Adper Prompt (AP, 3M ESPE, USA, pH: 1.0). In the control groups, they were applied with two sequential coats. In the experimental groups, after applying the first coat of assigned SEAs, the D/E bonding resin of All-Bond 2 (Bisco Inc., USA, pH: 6.9) was applied as the intermediate adhesive. Z-250 (3M ESPE, USA) composite resin was built-up in order to prepare hourglass-shaped specimens. The microtensile bond strength (MTBS) was measured and the effect of the intermediate layer on the bond strength was analyzed for each SEA using t-test. The fracture mode of each specimen was inspected using stereomicroscope and Field Emission Scanning Electron Microscope (FE-SEM). When D/E bonding resin was applied as the second coat, MTBS was significantly higher than that of the control groups. The incidence of the failure between the adhesive and the composite or between the adhesive and dentin decreased and that of the failure within the adhesive layer increased. According to the results, applying the bonding resin of neutral pH can increase the bond strength of SEAs by alleviating the difference in acidity between the SEA and restorative composite resin.
