Restorative Dentistry and Endodontics
- Volume 15 Issue 1
- /
- Pages.20-32
- /
- 1990
- /
- 2234-7658(pISSN)
- /
- 2234-7666(eISSN)
A STUDY ON THE FRACTURE TOUGHNESS OF DENTAL AMALGAMS
치과용(齒科用) 아말감의 파괴인성(破壞靭性)에 관한 연구(硏究)
- Huh, Hyeon-Do (Dept. of Conservative Dentistry, College of Dentistry, Seoul National University) ;
- Kim, Yung-Hai (Dept. of Conservative Dentistry, College of Dentistry, Seoul National University)
- Published : 1990.03.25
Abstract
The plane strain fracture toughness of a material characterize the resistance to fracture in the presence of a sharp crack under severe tensile condition. Fracture toughness can be determined by indentation method. The purpose of this study was to investigate the fracture toughness of dental amalgams by measuring the plane strain fracture toughness and the fracture toughness from indentation method. Two conventional and four high copper amalgam alloys were employed for this study. The amalgams were prepared according to the A.D.A. spec. No. 1 and inserted into the specially designed mould with the single edge notch specimen to use in 3-point bending method. The specimens (20mm long, 4mm wide, 2mm thick) were stored at
Keywords