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KMID : 0362420100480020135
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Journal of Korean Academy of Prosthodontics
2010 Volume.48 No. 2 p.135 ~ p.142
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Evaluation using Replica Technique on the marginal and internal fitness of zirconia cores by several CAD/CAM systems
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Huh Jung-Bo
Park Cheong-Gil
Kim Ha-Young
Park Chan-Kyung
Shin Sang-Wan
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Abstract
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Purpose: This study was aimed to compare the margin and internal fitness of single anterior all-ceramic crown zirconia core made by three deferent CAD/CAM systems.
Material and methods: Five single zirconia cores were manufactured by three deferent CAD/CAM systems(Cerasys®system, KaVo Everest®system, Lava™ system). The manufactured zirconia cores were duplicated through the use of replica technique, and a replicated sample was sectioned in the center of bucolingual and mesiodistal direction to measure the marginal and internal gap. Measurement was carried out by using measuring microscope (AXIO®) and I-Solution® and analysed through the use of ANOVA.
Results: As for the mean marginal fitness of the zirconia core, it was 84.74 ± 27.57 μm, in Cerasys®, 80.23 ± 21.07 μm in KaVo Everest® and 96.37 ± 11.45 μm in Lava™, and as for the mean internal gap, it was 94.11 ± 30.07 μm in Cerasys®, 92.31 ± 25.18 μm in KaVo Everest®, and 94.99 ± 18.74 μm in Lava™. There was no significant statistically deference among the total average gap of three systems. The internal gap in KaVo Everest® seemed to be smaller than Lava™ (P < .05). The internal gap in the incisal area was larger in all of the three systems.
Conclusion: There was no difference in marginal fitness in Cerasys®, KaVo Everest® and Lava™. As for the internal fitness, it was smaller in KaVo Everest® system than Lava™system. In all of the three systems, there was a larger gap in incisal area. The marginal and internal gap was within the clinically allowed range in all of the three systems.
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KEYWORD
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CAD/CAM, Zirconia core, Marginal fitness, Internal fitness
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