酸化ジルコニウムセラミックス用レヤリング陶材の熱膨張に関する研究

• 三浦 賞子

  東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野

• 稲垣 亮一

  東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野

• 依田 正信

  東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野

• 木村 幸平

  東北大学大学院歯学研究科口腔修復学講座咬合機能再建学分野

書誌事項

タイトル別名

• Thermal Expansion of Layering Porcelains for the Tetragonal Stabilized Zirconia

抄録

Purpose: The purpose of this study wasto investigate the coefficients of thermal expansion and shrinkage of an all-ceramic system (cercon^®smart ceramics, Degu Dent) utilizing tetragonal stabilized zirconia.<BR>Methods: The coefficients of thermal expansion and shrinkage of the core material and the layering porcelains (dentin and enamel) used in this study were measured according to the ISO 9693 standard. Five specimens for the core material and ten specimens for each layering porcelain were tested. The core specimens were milled, sintered, ground and polished. Five of the specimens for each layering porcelain were fired two times, and the remaining five specimens were fired four times. The fired layering porcelain specimens were ground and polished.<BR>The coefficients of thermal expansion and shrinkage were evaluated using a push-rod dilatometer at a heating rate of 5°C/min over temperature ranges of 25-700°Cfor the core, and 25-550°Cfor the layering porcelain. For each specimen, the coefficients of thermal expansion was determined to be between 25 and 500°Cfrom the plotted curve of expansion versus temperature.<BR>Results: For the core material, the coefficients of thermal expansion and shrinkage showed almost the same value (10.8×10^-6/°C). For the layering porcelains, the coefficients of thermal expansion and shrinkage ranged from 9.3-11.1×10^-6/°C. The difference of the coefficients of thermal expansion and shrinkage between the core materials and the layering porcelains was-0.3-1.5×10^-6/°C. The specimens fired two times and the specimens fired four times exhibited almost the same value for each layering porcelain.<BR>Conclusion: The core material and layering porcelains have a suitable relationship.

収録刊行物

• 日本補綴歯科学会雑誌

  日本補綴歯科学会雑誌 51 (3), 556-562, 2007

  社団法人 日本補綴歯科学会

キーワード

• 酸化ジルコニウム
• CAM
• 熱膨張率
• クラック
• 歯冠色陶材

詳細情報

• CRID: 1390282679389651200
• NII論文ID: 10029762390
• NII書誌ID: AN00197911
• DOI: 10.2186/jjps.51.556
• ISSN: 1883177X
• ISSN: 03895386
• PubMed: 17717408
• Web Site: http://www.jstage.jst.go.jp/article/jjps1957/51/3/51_3_556/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2007340354
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • PubMed
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可