치과용 스캐너로 채득한 디지털 모형의 반복성 및 재현성에 관한 3차원적 평가
Three-dimensional evaluation on the repeatability and reproducibility of dental scanner-based digital models
이경탁, 김재홍, 김웅철, 김지환,
소속 상세정보
이경탁 ( Lee Gyeong-Tak ) - 고려대학교 대학원 보건과학과
김재홍 ( Kim Jae-Hong ) - 고려대학교 대학원 보건과학과
김웅철 ( Kim Woong-Chul ) - 고려대학교 대학원 보건과학과
김지환 ( Kim Ji-Hwan ) - 고려대학교 대학원 보건과학과
KMID : 0362120120340030213
Abstract
Purpose: The aim of this study was to determine the repeatability and reproducibility of two dental scanners.
Methods: The master die and the stone replicas(Kavo, Germany) were digitized in touch-probe scanner(Incise, Renishaw, UK), white light scanner(Identica, Medit, Korea) to create 3-dimensional surface-models. The number of points in the point clouds from each reading were calculated and used as the CAD reference model(CRM). Discrepancies between the points in the 3-dimensional surface models and the corresponding CRM were measured by a matching-software(Power-Inspect R2, Delcam Plc, UK). The t-student test for one samples were used for statistical analysis.
Results: The reproducibility of both scanner was within , based on mean value. The mean value between measurements made directly on the touch probe scanner digital models and those made on the white light scanner digital models was , and was statistically significant(P<0.05).
Conclusion: With respect to adequate data acquisition, the reproducibility of dental scanner differs. Three-dimensional analysis can be applied to differential quality analysis of the manufacturing process as well as to evaluation of different analysis methods.
키워드
CRM(CAD Reference Model); dental scanner; digital model; point cloud; repeatability; reproducibility
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