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KMID : 1035320170440040359
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Korean Society for Dental Materials
2017 Volume.44 No. 4 p.359 ~ p.366
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Evaluation on the internal fitness of the zirconia prosthetic using dental CAD/CAM of cement space
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Jang Seong-Woo
Jeon Hyun-Woo
Mun Se-Jeong
Lee Hyun-Jin
Kim Joo-Yeon
Lee Jung-Soo
Bae Eun-Jeong
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Abstract
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In this study, the internal fitness of zirconia made by dental computer aided design/computer aided manufacturing (CAD/CAM) was evaluated of internal cement space. The first molar of the maxillary right was duplicated and 15 abutments were fabricated. The abutment teeth were scanned and designed as a general coping shape. Each group was set up cement space 30(group A), 50(group B), 70(group C) μm. The final fabricated zirconia was measured by silicon replica technique and digital microscopy (×140). Results were analyzed by one-way ANOVA and Tukey-post test (α=0.05). There was a significant difference between A and C buccal groups (p<0.05). The mean value of all the points except the distal part of group C was less than 120 μm. Although it is appropriate to apply clinically, it does not show the tendency of constant result different from set value. Therefore, further study on material and machine erroraffecting accuracy should be conducted.
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KEYWORD
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Dental CAD/CAM, Cement space, Internal fitness, Silicon replica technique, Zirconia restoration
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