Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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SHEAR BOND STRENGTH OF REPAIRED COMPOSITE RESIN RESTORATIONS

수리된 복합레진 수복물의 전단결합강도 연구

  • Choi, Soo-young (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University) ;
  • Jeong, Sun-Wa (Dept. of Dentistry, College of Medicine, Seonam University) ;
  • Hwang, Yun-Chan (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University) ;
  • Kim, Sun-Ho (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University) ;
  • Yun, Chang (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University) ;
  • Oh, Won-Mann (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University) ;
  • Hwang, In-Nam (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University)
  • 최수영 (전남대학교 치과대학 보존학교실, 치의학 연구소) ;
  • 정선와 (서남대학교 의과대학 치과학교실) ;
  • 황윤찬 (전남대학교 치과대학 보존학교실, 치의학 연구소) ;
  • 김선호 (전남대학교 치과대학 보존학교실, 치의학 연구소) ;
  • 윤창 (전남대학교 치과대학 보존학교실, 치의학 연구소) ;
  • 오원만 (전남대학교 치과대학 보존학교실, 치의학 연구소) ;
  • 황인남 (전남대학교 치과대학 보존학교실, 치의학 연구소)
  • Published : 2002.11.01
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Abstract

This study was peformed to evaluate the interfacial shear bond strength of base (direct and indirect) and repair composites with aging and surface treatment methods. Direct composite resin specimens ($Charisma^{\circledR}$, Heraeus Kulzer, Germany) were aged for 5 min, 1 hour, 24 hours, and 1 week in $37^{\circ}C$ distilled water before surface treatment, and then divided into five groups Group 1, grinding; Group 2, grinding and application of bonding agent, Group 3, grinding, etching with 37% phosphoric acid for 30sec, and application of bonding agent, Group 4, grinding, etching with 37% phosphoric acid for 30sec, silane treatment, and application of bonding agent ; Group 5, grinding, etching with 4% hydrofluoric acid for 30sec. silane treatment, and application of bonding agent. Indirect composite resin specimens ($Artglass^{\circledR}$, Heraeus Kulzer, Germany) were aged for 1 week in $37^{\circ}C$ distilled water and divided into seven groups Group 1 - Group 5, equal to Charisma specimens; Group 6, grinding, etching with 37% phosphoric acid for 60sec, silane treatment, and application of bonding agent; Group7, grinding, etching with 4% hydrofluoric acid for 60 sec, silane treatment, and application of bond-ing agent. The repair material($Charisma^{\circledR}$) was then added on the center of the surface (5 mm in diameter. 5 mm in height). The shear bond strength was tested and the data was analyzed using one-way ANOVA and the Student- Newman-Keuls test. The following conclusions were drawn. 1 The shear bond strength of $Charisma^{\circledR}$ specimens aged for 1 hour was significantly higher in Group 2 and Group 5 than in Group 1 (p<0.05), and that of $Charisma^{\circledR}$ specimens aged for 1 week was signifi-cantly higher in Group 3 and Group 5 than in Group 1 (p<0.05). No significant difference was found in the bond strength of specimens aged for 5 min and 24 hours. 2. In Group 2 of the $Charisma^{\circledR}$ specimens, there was significant difference between the bond strength of 24 hours and that of 1 week (p<0.05). 3. In Group 4 of the $Charisma^{\circledR}$ specimens, the shear bond strength of specimens aged for 24 hours was significantly higher than the others(p<0.05) 4. There was no significant difference between the shear bond strength of the $Artglass^{\circledR}$ specimens, 5. Most of the $Charisma^{\circledR}$ specimens showed cohesive fractures. Artglass^{\circledR}$ specimens that were etched with acid (phosphoric or hydrofluoric) for 30 sec showed more cohesive fractures.

Keywords

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