콘빔시티 촬영 프로토콜에 따른 DICOM 파일의 STL 변환 디지털 모델의 정확도 비교 (Comparative Accuracy of STL Conversion Digital Model of DICOM Files according to CBCT Scanning Protocols)

서지정보

· 발행기관 : 대한통합치과학회
· 수록지 정보 : 대한통합치과학회지 / 6권 / 1호 / 1 ~ 7페이지
· 저자명 : 한상선, 우창우, 정호걸, 이정희, 차정열, 나지연, 황재준, 김영현

초록

Objectives: The purpose of this study is to evaluate the accuracy of the digital models from Cone beam computed
tomography (CBCT) scans of orthodontic diagnostic models by comparing the Digital Imaging & Communication in
Medicine (DICOM) file to Stereolithography (STL) conversion data obtained by various voxel sized CBCT machines
with the digital model obtained by a 3D optical extraoral scanner.
Materials and Methods: Three orthodontic diagnostic models were scanned with a 3D optical scanner and stored
as STL file data. The three models were scanned with the 5 modes which were Object scan (100 μm), 300, 400 μm
of RAYSCAN α+ and 300, 390 μm of Alphard 3030. The DICOM files were converted to STL file data. For each
orthodontic model, two digital models obtained by CBCT and optical scanner were paired, and GOM inspect software
was used to superimpose and obtain the deviation between two digital models. One way ANOVA test was performed
to determine whether there is a statistical difference in the mean value of deviations between digital models by the 5
protocols.
Results: In three diagnostic models, the mean values of the deviations between the digital model of the Object scan
(100 μm) and the digital model of 3D optical scanner were the smallest in comparison with other image protocols and
there was a statistically significant difference (p<0.001). The mean values of the deviations were in the range of 0.0967
~0.1022 mm. On the other hand, deviations of STL data from 400 μm of RAYSCAN α+ showed the largest mean
value from 0.4007 to 0.4534 mm.
Conclusions: The STL file data of the Object scan (100 μm) of RAYSCAN α+ is more accurate than those of large
voxel sized protocols of CBCT. It shows the availability as an orthodontic digital model.

영어초록

Objectives: The purpose of this study is to evaluate the accuracy of the digital models from Cone beam computed
tomography (CBCT) scans of orthodontic diagnostic models by comparing the Digital Imaging & Communication in
Medicine (DICOM) file to Stereolithography (STL) conversion data obtained by various voxel sized CBCT machines
with the digital model obtained by a 3D optical extraoral scanner.
Materials and Methods: Three orthodontic diagnostic models were scanned with a 3D optical scanner and stored
as STL file data. The three models were scanned with the 5 modes which were Object scan (100 μm), 300, 400 μm
of RAYSCAN α+ and 300, 390 μm of Alphard 3030. The DICOM files were converted to STL file data. For each
orthodontic model, two digital models obtained by CBCT and optical scanner were paired, and GOM inspect software
was used to superimpose and obtain the deviation between two digital models. One way ANOVA test was performed
to determine whether there is a statistical difference in the mean value of deviations between digital models by the 5
protocols.
Results: In three diagnostic models, the mean values of the deviations between the digital model of the Object scan
(100 μm) and the digital model of 3D optical scanner were the smallest in comparison with other image protocols and
there was a statistically significant difference (p<0.001). The mean values of the deviations were in the range of 0.0967
~0.1022 mm. On the other hand, deviations of STL data from 400 μm of RAYSCAN α+ showed the largest mean
value from 0.4007 to 0.4534 mm.
Conclusions: The STL file data of the Object scan (100 μm) of RAYSCAN α+ is more accurate than those of large
voxel sized protocols of CBCT. It shows the availability as an orthodontic digital model.

참고자료

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