The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Comparative analysis of distance measurement on the rendering screen between dental CAD programs

치과용 CAD 프로그램의 렌더링 화면상 거리측정 비교분석

  • Cha, Cheol-Ho (Department of Prosthodontics, Veterans Health Service Medical Center) ;
  • Lim, Seon-Young (Department of Prosthodontics, Veterans Health Service Medical Center) ;
  • Bang, Ju-Hyuk (Department of Prosthodontics, Veterans Health Service Medical Center) ;
  • Kim, Seong-Ah (Department of Prosthodontics, Veterans Health Service Medical Center) ;
  • Kim, Seong-Yong (Department of Prosthodontics, Veterans Health Service Medical Center) ;
  • Lee, Yong-Sang (Department of Prosthodontics, Veterans Health Service Medical Center)
  • Received : 2020.08.18
  • Accepted : 2020.11.03
  • Published : 2021.01.29
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Abstract

Purpose: This study was to find out whether the rendering screen difference affect to measuring distance in a CAD program according to three types of CAD programs. Materials and methods: The model presented in ISO 12836 for dental scanner evaluation was reduced by 70%. This model was repeatedly scanned 15 times using Trios II (3Shape, Denmark). Using the output STL file, 3Shape CAD, inLab 15, and ExoCAD programs were used to measure the horizontal distance (H) and vertical distance (V) between adjacent point angle, and for each experiment, three groups were set according to the CAD program type. Statistical analysis was performed using One-way ANOVA test and post hoc was performed using Dunnett T3 test. Results: In the horizontal and vertical distance measurement, there was no difference in the average of the measured values between the three groups according to the CAD program (P>.05). Conclusion: There were no effect of the difference in the rendering screen in the horizontal and vertical linear distance measurements of the inlay model on the dental CAD program.

목적: 본 연구의 목적은 3가지 종류의 CAD 프로그램들에 따라 렌더링 화면 차이가 CAD 프로그램 상의 거리 측정에서의 차이로 나타나는지 알아보고자 함이다. 재료 및 방법: 치과용 스캐너 평가를 위해 제시된 ISO 12836 규격 인레이 모형을 70% 축소한 모델을 제작하였다. 이 모델을 Trios II (3Shape, Denmark)를 사용하여 총 15회 반복하여 연속적으로 스캔을 시행하였다. 출력된 STL 파일을 이용하여 3Shape CAD, inLab 15, ExoCAD 프로그램을 통해 인접한 점각 간 수평 거리(H)와 수직 거리(V)를 각각 측정하는 실험을 수행하였고, 각 실험마다 CAD 프로그램 종류에 따라 3개의 군으로 설정하였다. One-way ANOVA test를 통해 통계 분석하였고, Dunnett T3법으로 사후분석을 시행하였다. 결과: 수평거리와 수직거리 측정에서 모두 CAD 프로그램에 따른 세 군 간의 측정값 평균의 유의한 차이는 없었다 (P > .05). 결론: 치과용 CAD 프로그램상에서 인레이 모형의 수평, 수직 직선거리를 측정할 때, 프로그램 간의 렌더링 화면 차이에 따른 영향은 없다.

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