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Improvement of low temperature degradation in zirconia and bond strength of resin cement to zirconia by alumina-blasting before sintering

Research Project

Project/Area Number 15K11165
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Prosthodontics/ Dental materials science and
Research InstitutionNagasaki University

Principal Investigator

YOSHIDA Keiichi  長崎大学, 病院(歯学系), 講師 (70230729)

Co-Investigator(Kenkyū-buntansha) 平 曜輔  長崎大学, 医歯薬学総合研究科(歯学系), 准教授 (40226725)
鎌田 幸治  長崎大学, 病院(歯学系), 講師 (60264256)
Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywordsジルコニア / アルミナブラスティング / 焼結 / 表面性状 / 接着強さ / ガラスビーズ
Outline of Final Research Achievements

Plate zirconia specimens were prepared and divided into five surface conditions: PS; pre-sintered state without surface treatment, S; sintering, S+AAB; AB (0.3 MPa for 15 s) using 50 μm alumina particles after sintering, BAB; AB (0.1 MPa for 5 s) in the PS, and BAB+S; BAB subsequent sintering.
Ra obtained from the BAB+S specimens were significantly higher values (2.26 ± 0.19 μm) than those of the other four surface conditions. The relative amount of the monoclinic phase on the BAB specimens was 15.7 ± 1.9%. However, after sintering, the monoclinic peaks decreased dramatically zero, which was the same as for the S specimens. On the other hand, the S+AAB specimens showed significantly remarkable monoclinic phase of 28.6 ± 0.5%.
AB performed in the pre-sintered state subsequent sintering (BAB+S) resulted in higher surface roughness and less surface damage, compared with AB after sintering (S+AAB), which is a clinically routine procedure before cementation of zirconia restorations.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (3 results)

All 2017 2016

All Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Bonding of self-adhesive resin cements to alumina-blasting zirconia2017

    • Author(s)
      Yoshida K
    • Organizer
      95th International Association for Dental Research
    • Place of Presentation
      サンフランシスコ(アメリカ合衆国)
    • Year and Date
      2017-03-22
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Bonding of self-adhesive resin cement to alimina-blasting zirconia2017

    • Author(s)
      Yoshida K
    • Organizer
      95th International Association for Dental Research
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 焼結前にガラスビーズブラスティングしたジルコニアの表面特性2016

    • Author(s)
      吉田圭一
    • Organizer
      第67回日本歯科理工学会学術講演会
    • Place of Presentation
      九州大学医学部百年講堂(福岡県・福岡市)
    • Year and Date
      2016-04-16
    • Related Report
      2016 Research-status Report

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Published: 2015-04-16   Modified: 2019-03-29  

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