석고 모형, 레이저 스캔 디지털 모형, 콘 빔 CT 영상 간의 모형 분석 계측치 비교
Comparison of model analysis measurements among plaster model, laser scan digital model, and cone beam CT image
임미영, 임성훈,
소속 상세정보
임미영 ( Lim Mi-Young ) - 조선대학교 치과대학 교정학교실
임성훈 ( Lim Sung-Hoon ) - 조선대학교 치과대학 교정학교실
KMID : 0361920090390010006
Abstract
Objective: The purpose of this study was to evaluate the possibility of using a digital model and cone beam computed tomograph (CBCT) image for model analysis.
Methods: Model analyses of CBCT images, plaster models, and digital models of 20 orthodontic patients with a permanent dentition with no proximal metal restorations, were compared.
Results: The average differences of tooth size measurements were 0.01 to 0.20 mm, and the average difference of arch length discrepancy measurements were 0.41 mm in the maxilla and 0.82 mm in the mandible. The difference in Bolton discrepancy measurements was 0.17 mm for the anterior region and 0.44 mm overall but with no statistically significant difference. When comparing CBCT images with plaster models, the average differences in tooth size measurements were -0.22 to 0.01 mm, and the average differences in arch length discrepancy measurements were 0.43 mm in the maxilla and 0.32 mm in the mandible. Difference in Bolton discrepancy measurements were 0.35 mm in the anterior region and 1.25 mm overall. CBCT images showed significantly smaller overall Bolton discrepancy measurements.
Conclusions: Although there were statistically significant differences in some model analysis measurements, the ranges of measurement errors of the digital model and CBCT images were clinically acceptable. Therefore, a digital model and CBCT image can be used for model analysis. (Korean J Orthod 2009;39(1):6-17)
키워드
디지털 모형;콘 빔 CT;모형 분석;석고 모형
Digital model;Cone beam CT;Model analysis;Plaster model
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