Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Effect of Surface Condition on the Bonding Characteristics of 3Y-$ZrO_2$-Metal Bracket System

3Y-$ZrO_2$ 세라믹과 교정용 브라켓계에서 세라믹의 표면 조건에 따른 접착 거동의 변화

  • O, Seon-Mi (Department of Materials Engineering, Paichai University) ;
  • Kim, Jin-Seong (Department of Materials Engineering, Paichai University) ;
  • Lee, Chae-Hyun (Department of Materials Engineering, Paichai University)
  • 오선미 (배재대학교 재료공학과) ;
  • 김진성 (배재대학교 재료공학과) ;
  • 이채현 (배재대학교 재료공학과)
  • Received : 2011.02.10
  • Accepted : 2011.03.10
  • Published : 2011.03.30
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Abstract

Purpose: To investigate shear bonding strength between dental zirconia ceramics with different surface treatment and metal bracket. Methods: Zirconia ceramics(LAVA, 3M ESPE, USA) were divided to 4 groups according to their surface treatment; no surface treatment(G1), sand blasting(G2), silane coating(G3), and sand blasting+silane coating(G4). Specimens were bonded to metal bracket using resin bond($Transbond^{TM}XT$, 3M Unitek, USA). Shear bond strength was measured using universal test machine(3366 INSTRON. U.S.A) with cross head speed of 1 mm/min. Microstructural investigation for fracture surface was performed after shear test. Results: Shear bonding strengths of single surface treatment groups (G2 and G3) were higher than no treatment group(G1). Combined Treatment Group (G4) showed the highest shear bond strength of 9.15MPa. Microstructural observation shows that higher shear bonding strength was obtained when debonding was occurred at metal bracket/resin interface rather than zirconia ceramic/resin interface. Conclusion: Surface treatment of zirconia is necessary to obtain higher bonding strength. Combined treatment can be more effective when surface the surfaces are kept clean and homogeneous.

Keywords

References

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