3종의CAD/CAM 시스템에서 지르코니아 코어의 파절 강도에 관한 비교 연구

초록

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. Adensဂ CAD/CAM system, group 2. Cerasysဂ CAD/CAM system, group 3. 3M LAVAဂ 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/SN5Sဂ. 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 Adensဂ system was 615.89±156.1N, the Cerasysဂ system was 863.98±151.5N, and the 3M LAVAဂ system was 1143.1±286.6N. 2. The fracture strength of the systems showed the significant statistical differences in order of 3M LAVAဂ system, Cerasysဂ system, Adensဂ 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.

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