|
KMID : 0362420080460010022
|
|
Journal of Korean Academy of Prosthodontics
2008 Volume.46 No. 1 p.22 ~ p.30
|
|
|
Comparative study in fracture strength of zirconia cores fabricated with three different CAD/CAM systems
|
|
Shin Eon-Sick
Park Won-Hee
Lee Young-Soo
|
|
|
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 CAD/CAM system, group 2. Cerasys CAD/CAM system, group 3. 3M LAVA CAD/CAM system. All specimens were manufactured consistently thickness 0.5mm and relief 40μm. Specimens were subjected to compressive loading on the lingual area by Z250/SN5S. 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 system was 615.89±156.1N, the Cerasys system was 863.98±151.5N, and the 3M LAVA system was 1143.1±286.6N. 2. The fracture strength of the systems showed the significant statistical differences in order of 3M LAVA system, Cerasys system, Adens 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.
|
|
|
KEYWORD
|
|
|
Zirconia core, Fracture strength, CAD/CAM system, All-ceramic crown
|
|
|
FullTexts / Linksout information
|
|
  
|
|
|
Listed journal information
|
|
 
|