Mechanical properties of monolithic zirconia crowns

2015 Fiscal Year Final Research Report

• Project/Area Number: 25462981
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Tohoku University
• Principal Investigator: Ryoichi Inagaki 東北大学, 歯学研究科(研究院), 講師 (60260444)
• Co-Investigator(Kenkyū-buntansha): NAKAMURA Keisuke 東北大学, 大学院歯学研究科, 助教 (30431589)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: ジルコニア / 補綴装置 / 強度 / 耐久性

Outline of Final Research Achievements

The present study aimed to evaluate the influence of crown thickness on the fracture resistance of monolithic zirconia crowns. In addition, the effects of aging (spontaneous crystalline phase transformation), cyclic loading and addition of coloring agents were investigated.
The results demonstrated that monolithic zirconia crowns with a minimal thickness of 0.5 mm could work as molar crowns. Even though monolithic zirconia crowns were affected by aging and cyclic loading, the fracture load of the crown was sufficiently higher than maximum bite force (about 1000 N). Furthermore, it was shown that the coloring procedure would not affect the strength of zirconia. The results obtained in the present study should be verified in clinical studies in the future.

Free Research Field

歯科補綴学