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

Takashi Nakamura, Hirofumi Usami, Hiroshi Ohnishi, Hisataka Nishida, Xuehua Tang, Kazumichi Wakabayashi, Tohru Sekino, Hirofumi Yatani

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The aim of this study was to determine the mach inability 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.

Original languageEnglish
Pages (from-to)106-112
Number of pages7
JournalDental materials journal
Volume31
Issue number1
DOIs
Publication statusPublished - 2012 Jan 21

Keywords

  • Accelerated aging test
  • Degradation
  • Milling
  • Silica
  • Zirconia

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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