The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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EFFECT OF SURFACE ROUGHNESS ON BOND STRENGTH IN TITANIUM-PORCELAIN SYSTEM

타이타늄의 표면거칠기가 도재의 결합강도에 미치는 영향

  • Kim, Sang-Hun (Department of Prosthodontics, College of Dentistry, Chonnam University) ;
  • Vang, Mong-Sook (Department of Prosthodontics, College of Dentistry, Chonnam University) ;
  • Yang, Hong-So (Department of Prosthodontics, College of Dentistry, Chonnam University) ;
  • Park, Sang-Won (Department of Prosthodontics, College of Dentistry, Chonnam University) ;
  • Park, Ha-Ok (Department of Prosthodontics, College of Dentistry, Chonnam University) ;
  • Lim, Hyun-Pil (Department of Prosthodontics, College of Dentistry, Chonnam University) ;
  • Oh, Gye-Jeong (Department of Prosthodontics, College of Dentistry, Chonnam University)
  • 김상훈 (전남대학교 치의학전문대학원 치과보철학교실) ;
  • 방몽숙 (전남대학교 치의학전문대학원 치과보철학교실) ;
  • 양홍서 (전남대학교 치의학전문대학원 치과보철학교실) ;
  • 박상원 (전남대학교 치의학전문대학원 치과보철학교실) ;
  • 박하옥 (전남대학교 치의학전문대학원 치과보철학교실) ;
  • 임현필 (전남대학교 치의학전문대학원 치과보철학교실) ;
  • 오계정 (전남대학교 치의학전문대학원 치과보철학교실)
  • Published : 2007.04.30
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Abstract

Statement of problem: Titanium has many advantages of high biocompatibility, physical properties, low-weight, low price and radiolucency, but it is incompatible with conventional dental porcelain due to titanium's oxidative nature. Many previous studies have shown that they used the method of sandblast for surface treatment prior to porcelain application, the researches are processing about the method of acid etching or surface coating. Purpose: The purpose of this research is to study the effect on bond strength of surface roughness between titanium and porcelain with the same surface topography. Material and method: In this study, we evaluated the bond strength by using 3-point bending test based on ISO 9693 after classified 8 groups - group P : polished with #1200 grit SiC paper, group S10 : $1.0{\mu}m$ surface roughness with sandblasting, group S15 : $1.5{\mu}m$ surface roughness with sandblasting, group S20 : $2.0{\mu}m$ surface roughness with sandblasting, group S25 : $2.5{\mu}m$ surface roughness with sandblasting, group S30 : $3.0{\mu}m$ surface roughness with sandblasting, group S35 : $3.5{\mu}m$ surface roughness with sandblasting, group E : $1.0{\mu}m$ surface roughness with HCl etching. Results: Within the confines of our research, the following results can be deduced. 1. In the results of 3-point bending test, the bond strength of sandblasting group showed significant differences from one of polishing group, acid etching group(P<.05). 2. The bond strength of sandblasting groups did not show significant differences. 3. After surface treatments, the group treated with sandblasting showed irregular aspect formed many undercuts, in the SEM photographs. The bond strength of sandblasting group was higher than 25 MPa, the requirement of ISO 9693. Conclusion: In above results, bond strength of titanium and low-fusing porcelain is influenced more to surface aspect than surface roughness. And titanium has clinically acceptable bond strength below surface roughness of $3.5{\mu}m$.

Keywords

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