• 제목/요약/키워드: Low fusing dental ceramics

검색결과 1건 처리시간 0.013초

티타늄과 니켈-크롬 합금의 도재결합강도 비교 (COMPARISON OF THE BOND STRENGTH OF CERAMICS FUSED TO TITANIUM AND Ni-Cr ALLOY)

  • 박세영;전영찬;정창모
    • 대한치과보철학회지
    • /
    • 제41권1호
    • /
    • pp.89-98
    • /
    • 2003
  • Titanium requires special ceramic system for veneering. Low fusing dental ceramics with coefficients of thermal expansion matching that of titanium have been developed. The purpose of this study was determine the bond strengths between cast and noncast pure titanium and two commercial titanium porcelains, and to compare the results with a conventional nickel-chromium alloy-ceramic system. The bond strengths were determined using a 3-point flexure test. Three-point flexure specimens $25{\times}3{\times}0.5mm$ were prepared After removal of ${\alpha}-case$ layer, they were veneered with $8{\times}3{\times}1mm$ of ceramics at the center of the bar. Specimens were tested in a universal testing machine. Within the limits of this study, the following conclusions were drawn: 1. The bond strengths between pure titanium and two commercial porcelains exceeded th lower limit of the bonding strength value in ISO 9693(25MPa). 2. There was no significant difference between cast and noncast titanium-porcelain bonds. 3. There was no significant difference between two commercial titanium porcelains. 4. The bond strengths of the titanium-porcelain systems ranged from 73% to 79% of that of the Ni-Cr-conventional porcelain system.