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논문 기본 정보

자료유형
학술저널
저자정보
이준식 (Department of Dental Biomaterials Science School of Dentistry Seoul National University Seoul Republic of Korea) 주성원 (Department of Dental Biomaterials Science School of Dentistry Seoul National University Seoul Republic of Korea) 김지형 (L Dental Hospital Seoul Republic of Korea) 황시언 (Department of Dental Biomaterials Science School of Dentistry Seoul National University Seoul Republic of Korea) 안진수 (서울대학교)
저널정보
대한치과보철학회 The Journal of Advanced of Prosthodontics The Journal of Advanced of Prosthodontics 제15권 제2호
발행연도
2023.4
수록면
72 - 79 (8page)
DOI
https://doi.org/10.4047/jap.2023.15.2.72

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Purpose. The purpose of this in vitro study was to compare the accuracy of various 3D printers and a milling machine. Materials and methods. The die model was designed using CAD (Autodesk Inventor 2018 sp3). The 30 µm cement space was given to the die and the ideal crown of the mandibular left first molar was designed using CAD (ExoCAD). The crowns were produced using the milling machine (Imes-icore 250i) and the 3D printers (Zenith U, Zenith D, W11) and they were divided into four groups. In all groups, the interior of each crown was scanned (Identica blue) and superimposed (Geomagic Control X) with the previously designed die. The difference between the die and the actual crown was measured at specific points. The Kruskal-Wallis test, the Mann-Whitney test, and Bonferroni’s method were performed with a statistical analysis software (P < .008 in inter-group comparison P < .001 in intra-group comparison). Results. In all groups, the center of the occlusal area and the anti-rotational dimple area showed significantly greater difference and the marginal area showed the smallest difference comparatively. The mean value of the difference in each area and the sum of the differences were higher in order of W11, Imes-icore 250i, Zenith D, and Zenith U. Conclusion. The digital light processing (DLP) method shows higher accuracy compared to the sereolithography (SLA) method using the same resin material. [J Adv Prosthodont 2023;15:72-9]

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