3종의CAD/CAM 시스템에서 지르코니아 코어의 변연 적합도에 관한 비교 연구
Comparative study in marginal adaptation of zirconia cores fabricated with 3 different CAD/CAM systems
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초록
최근 개발된 다양한 CAD/CAM 시스템으로 제작된 지르코니아 코어의 변연 적합도에 관해 많은 연구가 있었다. 그러나 비교 연구는 미흡 한 실정이다. 본 연구의 목적은 3종의 CAD/CAM 시스템에서 단일 전부 도재관을 위한 지르코니아 코어의 변연 적합도를 비교하는 것이다. 실험을 통하여 3종의 CAD/CAM 시스템(Adensဂ 시스템, Lavaဂ 시스템, Cerasysဂ 시스템) 으로 제작된 지르코니아 코어의 변연 적합도 를 비교하였다. 각 시스템당 10개의 지르코니아 코어를 제작하였다. 광학현미경(L-150Aဂ, Nikon, Japan)을 사용하여 총 50곳의 변연 간 격을 측정하였다. 통계처리는 Kruskal Wallis test와 Wilcoxon Rank Sum test를 시행하였다. 단일 전부 도재관을 위한 지르코니아 코어 의 총 변연간격은 Adensဂ 시스템이 284.5±152.9㎛, Lavaဂ 시스템이 99.0±73.0㎛, 그리고 Cerasysဂ 시스템이 153.5±85.7㎛ 이었 다. 본 연구내에서, Lavaဂ 시스템이 다른 시스템에 비해 우수한 변연 적합도를 보였다.
Abstract
Statement of problem: There have been many studies about marginal adaptation of Zirconia core fabricated with various CAD/CAM systems. But, the comparative study has not been conducted much. Purpose: This study was to compare marginal adaptations of zirconia cores fabricated with 3 different CAD/CAM systems. Material and methods: The in vitro marginal adaptations of zirconia cores fabricated with 3 different CAD/CAM systems(Adensဂ system, Lavaဂ system, and Cerasysဂ system) were evaluated and compared. In this study 30 zirconia cores were fabricated(10 zirconia cores per each system). The measurements of the marginal adaptatioin were carried out using microscope L-150Aဂ(Nikon, Japan). Measurements were recorded at 50 points. The measurements were analyzed using Kruskal-Wallis test and Wilcoxon rank sum test. Results: Within the limits of this study, the results were as follows. 1. Mean marginal gap values obtained were 284.5±152.9㎛ in Adens system, 99.0±73.0㎛ in Lava system, and 153.5±85.7㎛ in Cerasys system. 2. Zirconia core made by Lava system showed the smallest marginal gap(P<0.05). Conclusion: In the limitation of this study, we concluded that Lavaဂ System was superior than other systems(Adensဂ system and Cerasysဂ system) in the marginal adaptation.
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