Shear bond strength of repaired composite resin restorations

• DOI: 10.5395/jkacd.2002.27.6.569
• Publication Date: 2010-11-16T00:56:05Z
• Authors: Soo-young Choi; Sun-Wa Jeong; Yun-Chan Hwang; Sun-Ho Kim; Chang Yun; Won-Mann Oh; In-Nam Hwang
• Keywords: Phosphoric acid; Distilled water; Hydrofluoric acid

This study was peformed to evaluate the interfacial shear bond strength of base (direct and indirect) repair composites with aging surface treatment methods. Direct composite resin specimens (, Heraeus Kulzer, Germany) were aged for 5 min, 1 hour, 24 hours, week in distilled water before treatment, then divided into five groups Group 1, grinding; 2, grinding application bonding agent, 3, grinding, etching 37% phosphoric acid 30sec, 4, silane agent ; 5, 4% hydrofluoric 30sec. agent. Indirect seven - equal Charisma specimens; 6, 60sec, agent; Group7, 60 sec, bond-ing The material() added on center (5 mm diameter. height). tested data analyzed using one-way ANOVA Student- Newman-Keuls test. following conclusions drawn. hour significantly higher 2 than (p signifi-cantly 3 specimens, there significant difference between hours that others(p 5. Most showed cohesive fractures. Artglass^{\circledR}$ etched (phosphoric or hydrofluoric) 30 sec more