지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Purpose: Thy yttria tetragonal zirconia polycrystalline(Y-TZP) is a good structural ceramic for dental restoration. But it have a problem that delamination of veneering ceramic from the Y-TZP core materials. The problem generally occur at the interface, thus this study was conducted to evaluate the interface of Y-TZP using scanning electron microscopy(SEM). Methods: To investigate this aspect, high-resolution SEM observations were made of polished and etched (HF content gel) cross-sections of the interface area. Dry and moist veneering porcelain powders were built up on the zirconia base. Results: The extent of this surface faceting is dependent upon the moisture content of the porcelain powder and the firing temperature. More moisture and higher final heating temperature accelerates the observed faceting of the Y-TZP grains at the interface to the veneering ceramic. Conclusion: These changes of the Y-TZP grains indicate that destabilization of the tetragonal phase of zirconia occurs at the interface during veneering with ceramic. It may result in a reduction of the stability of the zirconia and interface.
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참고문헌 (25)
참고문헌 신청
Aboushelib MN / 2005 / Microtensile bond strength of different components of core veneered all-ceramic restorations / Dent Mater 21:984~991
Bagby M / 1990 / Metal ceramic compatibility: A review of the literature / J Prosthet dent 63:21~25
Chevalier J / 1999 / Lowtemperature aging of Y-TZP ceramics / J Am Ceram Soc 82:2150~2154
Chevalier J / 2007 / Lowtemperature degradation of zirconia and implications for biomedical implants / Annu Rev Mater Res 37:1~32
Christel P / 1989 / Mechanical properties and short-term in-vivo evaluation of yttrium-oxidepartially-stabilized zirconia / J Biomed Mater Res 23(1):45~61
Bagby M / 1990 / Metal ceramic compatibility: A review of the literature / J Prosthet dent 63:21~25
Chevalier J / 1999 / Lowtemperature aging of Y-TZP ceramics / J Am Ceram Soc 82:2150~2154
Chevalier J / 2007 / Lowtemperature degradation of zirconia and implications for biomedical implants / Annu Rev Mater Res 37:1~32
Christel P / 1989 / Mechanical properties and short-term in-vivo evaluation of yttrium-oxidepartially-stabilized zirconia / J Biomed Mater Res 23(1):45~61
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