Fracture resistance of screw-retained implant-supported zirconia-based prostheses

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K11175
• 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: Nihon University
• Principal Investigator: KOMINE Futoshi 日本大学, 歯学部, 准教授 (90287657)
• Co-Investigator(Kenkyū-buntansha): 松村 英雄 日本大学, 歯学部, 教授 (40199857) ; 橋口 亜希子 日本大学, 歯学部, 助教 (70386069)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ジルコニア / インプラント上部構造 / スクリュー固定 / 破壊抵抗

Outline of Final Research Achievements

The objective of this in vitro study was to investigate fracture loads of screw-retained zirconia-based molar prostheses (hybrid abutment crown) fabricated with different restorative materials and designs.
Within the limitations of this in vitro study, the following conclusions were drawn: 1. Fracture loads were significantly higher for screw-retained implant-supported monolithic zirconia prostheses than for screw-retained bilayered prostheses. 2. The fracture resistance of the indirect compositelayered zirconia-based prostheses was comparable to that of the porcelain-layered zirconia-based prostheses and metal ceramic prostheses. 3. All screw-retained implant-supported prostheses tested were able to withstand physiological molar masticatory forces.

Free Research Field

歯科補綴学