Search of the relation between time-dependent degradation of zirconia-porcelain bond strength

• Project/Area Number: 22791910
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Prosthetic dentistry
• Research Institution: Kanagawa Dental College
• Principal Investigator: AOKI Hiromichi 神奈川歯科大学, 歯学部, 非常勤講師 (50350533)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: ジルコニア / 陶材 / 紫外線 / 接着 / 審美修復材料 / エイジング / 表面加工 / セメント / 破断試験

Research Abstract

Zirconia ceramics has been used to treat esthetic restoration.
However, chip-off fractures of porcelain was one of clinical failure with frequency.
The aim of this study was to evaluate the effect of time-dependent degradation of zirconia surface and porcelain adhesive strength. In addition, this study was to evaluate the influence of ultraviolet irradiation on the zirconia-porcelain bond strength. The atomic percentage of carbon continued to increase the zirconia surfaces time-dependent. Ultraviolet irradiation was decreased the atomic percentage of carbon on zirconia surface. Furthermore, zirconia-porcelain bond strength was increased by ultraviolet irradiation.