지르코니아 CAD/CAM block의 강도에 관한 연구
A study on the Flexural strength of zirconia CAD/CAM block
이정수,
소속 상세정보
이정수 ( Lee Jung-Soo ) - TEM치과기공소
KMID : 0362120080300020065
Abstract
Recently, zirconia is widely used in the field of dental ceramics thanks to the proliferation of CAD/CAM systems. Accordingly, different types of zirconia block are being solid in the market. However, there are no precise, objective standards for properties of zirconia. This study concerns the flexural strength of zirconia ceramic for CAD/CAM block. The test specimens used for this study were ZirBlank(Acucera), ZirBlank shade(Acucera), VITA, Cercon(Densply) and Cerasys. The test results suggest that ZirBlank shade block shows the highest flexural strength and density among the zirconia blocks tested. Its flexural strength was 971 58 and its density was 99.89%. On the other hand, Cerasys block shows the lowest flexural strength of 576 36 and the lowest density of 94.85%. Given all, the density of the specimens is found to be directly proportional to strength and inversely to grain size.
키워드
CAD/CAM block;Density;Flexural strength;Grain size;Zirconia
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