Literature review on fractography of dental ceramics
10.14368/jdras.2022.38.3.138
- Author:
Min-Gyu SONG
1
;
Min-Sang CHA
;
Kyung-Ho KO
;
Yoon-Hyuk HUH
;
Chan-Jin PARK
;
Lee-Ra CHO
Author Information
1. Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea
- Publication Type:Review Article
- From:Journal of Dental Rehabilitation and Applied Science
2022;38(3):138-149
- CountryRepublic of Korea
- Language:English
-
Abstract:
The clinical applicability of ceramics can be increased by analyzing the causes of fractures after fracture testing of dental ceramics. Fractography to analyze the cause of fracture of dental ceramics is being widely applied with the development of imaging technologies such as scanning electron microscopy. Setting the experimental conditions is important for accurate interpretation. The fractured specimens should be stored and cleaned to avoid contamination, and metal pretreatment is required for better observation. Depending on the type of fracture, there are dimple rupture, cleavage, and decohesive rupture mainly observed in metals, and fatigue fractures and conchoidal fractures observed in ceramics. In order to reproduce fatigue fracture in the laboratory, which is the main cause of fracture of ceramics, a dynamic loading for observing slow crack growth is essential, and the load conditions and number of loads must be appropriately set. A typical characteristic of a fracture surface of ceramic is a hackle, and the causes of fracture vary depending on the shape of hackle. Fractography is a useful method for in-depth understanding of fractures of dental ceramics, so it is necessary to follow the exact experimental procedure and interpret the results with caution.
