Comparative study in fracture strength of zirconia cores fabricated with three different CAD/CAM systems.
- Author:
Eon Sick SHIN
1
;
Young Soo LEE
;
Won Hee PARK
Author Information
1. Department of Prosthodontics, College of Dentistry, Dankook University, Korea. leeys@hanyang.ac.kr
- Publication Type:Comparative Study ; Original Article
- Keywords:
Zirconia core;
Fracture strength;
CAD/CAM system;
All-ceramic crown
- MeSH:
Incisor;
Zirconium
- From:The Journal of Korean Academy of Prosthodontics
2008;46(1):22-30
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: The purpose of this study is to compare three different CAD/CAM systems through the fracture strength of zirconia core and to evaluate the clinical availability of each system. MATERIAL AND METHODS: The following three groups of 30 maxillary mesial incisor core for all-ceramics(each group 10) were fabricated as follows: group 1. Adens(R) CAD/CAM system, group 2. Cerasys(R) CAD/CAM system, group 3. 3M LAVA(R)CAD/CAM system. All specimens were manufactured consistently thickness 0.5mm and relief 40 micrometer. Specimens were subjected to compressive loading on the lingual area by Z250/SN5S(R). Each group's mean and standard deviation were calculated and Kruskal Waillis test, Wilcoxon Rank Sum test were utilized to find out the relationship among the groups. RESULTS: The results were as follows: 1. The mean fracture strength of Adens(R) system was 615.89+/-156.1N, the Cerasys(R) system was 863.98+/-151.5N, and the 3M LAVA(R) system was 1143.1+/-286.6N. 2. The fracture strength of the systems showed the significant statistical differences in order of 3M LAVA(R) system, Cerasys(R) system, Adens(R) system. CONCLUSION: In this study, in spite of the differences among the groups, every group showed clinically useful results. It is necessary to study further clinical experiments on a long term basis.
