The relationship between milling a new silica-doped zirconia and its resistance to low-temperature degradation (LTD) : a pilot study

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Author(s)

    • NAKAMURA Takashi
    • Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
    • USAMI Hirofumi
    • Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
    • TANG Xuehua
    • Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
    • SEKINO Tohru
    • Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
    • YATANI Hirofumi
    • Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry

Abstract

The aim of this study was to determine the machinability of new silica-doped Y-TZP by CAD/CAM and the resistance to low temperature degradation of the milled sample by comparing with a commercial HIP type Y-TZP material. The copings could be milled from silica-doped Y-TZP blocks without chipping, and there was no significant difference between the two types of Y-TZP materials in either the marginal or the inner gap between the abutment and the coping. After aging, the monoclinic content in the commercial Y-TZP copings increased from 25% before testing to 65%, while that of silica-doped Y-TZP copings slightly increased from 23% to 30%. The silica-doped Y-TZP copings did not have any significant difference in fracture load in a comparison between the control group and the aging group, while the commercial Y-TZP copings had a significantly lower fracture load for the aging group than for the control group.

Journal

  • Dental Materials Journal

    Dental Materials Journal 31(1), 106-112, 2012-01-01

    The Japanese Society for Dental Materials and Devices

References:  26

Codes

  • NII Article ID (NAID)
    10030128418
  • NII NACSIS-CAT ID (NCID)
    AA10443149
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    02874547
  • Data Source
    CJP  J-STAGE 
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