Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
권호 표지

Effects of Various Acid Etching Methods on the Shear Bond Strength between Iithium Disilicate Ceramic and Composite Resin

다양한 산처리 방법이 lithium Disilicate 도재와 복합레진간의 전단결합강도에 미치는 영향

  • Kang, Dae-Hyun (Department of Prosthodontics and Institute of Oral Bio-Science, School of Dentistry, Chonbuk National University) ;
  • Bok, Won-Mi (Department of Prosthodontics and Institute of Oral Bio-Science, School of Dentistry, Chonbuk National University) ;
  • Song, Jin-Won (Department of Prosthodontics and Institute of Oral Bio-Science, School of Dentistry, Chonbuk National University) ;
  • Song, Kwang-Yeob (Department of Prosthodontics and Institute of Oral Bio-Science, School of Dentistry, Chonbuk National University) ;
  • Ahn, Seung-Ggeun (Department of Prosthodontics and Institute of Oral Bio-Science, School of Dentistry, Chonbuk National University)
  • 강대현 (전북대학교 치과대학 치과보철학교실, 구강생체과학연구소) ;
  • 복원미 (전북대학교 치과대학 치과보철학교실, 구강생체과학연구소) ;
  • 송진원 (전북대학교 치과대학 치과보철학교실, 구강생체과학연구소) ;
  • 송광엽 (전북대학교 치과대학 치과보철학교실, 구강생체과학연구소) ;
  • 안승근 (전북대학교 치과대학 치과보철학교실, 구강생체과학연구소)
  • Published : 2006.06.30
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Abstract

Statement of problem. Porcelain repair mainly involves replacement with composite resin, but the bond strength between composite resin and all-ceramic coping materials has not been studies extensively. Purpose. The objective of this study was to investigate the influence of composite resin and ceramic etching pattern on shear bond strength of Empress2 ceramic and observe the change of microstructure of ceramic according to etching methods. Material and methods. Eighty-five cylinder shape ceramic specimens (diameter 5mm, IPS Empress 2 core materials) embeded by acrylic resin were used for this study. The ceramic were specimens divided into sixteen experimental groups with 5 specimens in each group and were etched with phosphoric acid(37%, 65%) & hydrofluoric acid (4%, 9%) according to different etching times(30s, 60s, 120s 180s). All etched ceramic surfaces were examined morphologically using SEM(scanning electron microscopy). Etched surfaces of ceramic specimens were coated with silane (Monobond-S) & adhesive(Heliobond) and built up composite resin using Teflon mold. Accomplished specimens were tested under shear loading until fracture on universal testing machine at a crosshead speed 1mm/min; the maximum load at fracture(kg) was recorded. Shear bond strength data were analyzed with one way ANOVA and Duncan tests.(P<.05) Results. Maximum shear bond strength was $30.07{\pm}2.41(kg)$ when the ceramic was etched with 4% hydrofluoric acid at 120s. No significant difference was found between phosphoric etchant group and control group with respect to shear bond strength. Conclusion. Empress 2 ceramic surface was not etched by phosphoric acid, but etched by hydrofluoric acid.

Keywords

References

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