대한치과보철학회지 (The Journal of Korean Academy of Prosthodontics)
- 제38권6호
- /
- Pages.757-764
- /
- 2000
- /
- 0301-2875(pISSN)
- /
- 2005-3789(eISSN)
Evaluation of the fracture resistance of all-ceramic zirconia posts by 3 different methods
- Jeong, Seung-Mi (Department of Prosthodontics, School of Dentistry, University of Chosun) ;
- Chung, Chae-Heon (Department of Prosthodontics, School of Dentistry, University of Chosun) ;
- Kang, Dong-Wan (Department of Prosthodontics, School of Dentistry, University of Chosun) ;
- Ludwig, Klaus (Department of Prosthodontics, Propaedeutics, and Dental Materials, School of Dentistry, Christian-Albrechts University) ;
- Kern, Matthias (Department of Prosthodontics, Propaedeutics, and Dental Materials, School of Dentistry, Christian-Albrechts University) ;
- Huels, Alfons (Department of Prosthodontics, Propaedeutics, and Dental Materials, School of Dentistry, Georg-August University)
- 발행 : 2000.12.01
초록
Statement of the problem. All-ceramic post-and-core restorations offer a number of advantages compared with systems that use metal build-ups. In certain clinical cases, however, fractures at the joint between the post and core build-up have been reported. Purpose. The objective, therefore, is to improve the joint between the post and the core build-up. Material and methods. Three different methods were used to prepare all-ceramic post-and-core restorations; pressing IPS Empress core build-ups to CosmoPost zirconia posts, cement-ing IPS Empress core build-ups to CosmoPost zirconia posts and Celay-milling of zirconia blanks. A series of ten restorations was prepared for each of the three methods. The post-and-core complexes were tested to failure with the load applied perpendicular to the post axis. The load and deflection at fracture were recorded. Results. The highest breaking load and highest deflection were recorded for the cementing technique with values of 25.3 N and