DOI QR코드

DOI QR Code

Evaluations of the Accuracy and Reliability of Measurements Made on White Light Scanner-based Dental Digital Models

백색광 스캐너로 채득된 치과용 디지털모형의 정확도와 신뢰도 평가

  • 김기백 (고려대학교 일반대학원 보건과학과 치의기공전공) ;
  • 김재홍 (고려대학교 일반대학원 보건과학과 치의기공전공)
  • Received : 2012.07.11
  • Accepted : 2012.09.19
  • Published : 2012.10.28

Abstract

Dental scanner-based dental digital models have been developed that have the potential to replace conventional stone model. The aim of this study was examine the accuracy and reliability of measurements made on digital models. A master model with the prepared upper full arch tooth was used. Stone model(N=10) were produced from master model, and on the other hands, digital models were made with the white light scanner(Identica, korea). One examiner individually measured 6 parameters on the conventional model and the digital models on two occasions. The student's t-test for paired samples and intra-class correlation coefficient(ICC) were used for statistical analysis. At the intra-examiner reliability of measurement, ICC at the stone and digital models were 0.75 and 0.87. The mean difference between measurements made directly on the stone models and those made on the digital models was 0.11-0.23mm, and was statistically significant(P<0.05). These in vitro studies show that accuracy of the digital model is similar to that of the stone model. These results will have to be confirmed in further clinical studies.

치과용 스캐너를 기반으로 하는 디지털 모형은 기존의 전통적인 석고모형을 대체할 만큼 발전되고 있다. 본 연구의 목적은 디지털모형의 정확도와 신뢰도를 평가하고자 하였다. 상악의 전악모형을 주 모형으로 설정하여 주 모형으로부터 석고모형을 제작하였고(N=10), 치과용 백색광 스캐너를 이용하여 10개의 디지털모형 데이터를 채득하였다. 제작된 두 실험군(석고모형, 디지털모형)을 1명의 검사자가 2회에 걸쳐서 6곳의 계측지점을 측정하였다. 짝 표본 t-검정과 급내 상관계수을 이용하여 통계적인 분석을 하였다. 실험결과 측정값의 검사자 내 신뢰도는 급내 상관계수 결과 두 실험군 0.75에서 0.87의 범위를 보였다. 석고모형과 디지털 모형의 평균 오차값은 0.11mm에서 0.23mm의 범위를 나타내었고, 모든 계측지점에서 통계적으로 유의한 차이를 보였다(P<0.05). 본 실험결과 모든 계측지점에서 적정수준의 정확성은 확보되지 않았으나, 선행연구에 비추어 볼 때 임상적인 효용성은 검증되었다. 추가적으로 임상적인 사례를 통해 평가되어야 할 것으로 사료된다.

Keywords

References

  1. T. Miyazaki, Y. Hotta, J. Kunii, S. Kuriyama, and Y. Tamaki, "A review of dental CAD/CAM: current status and future perspectives from 20 years of experience," Dent Mater J, Vol.28, No.1, pp.44-56, 2009. https://doi.org/10.4012/dmj.28.44
  2. E. D. Rekow, "High-technology innovations and limitations for restorative dentistry," Dent Clin North Am, Vol.37, No.2, pp.513-524, 1993.
  3. G. J. Christensen, "Impressions are changing: deciding on conventional, digital or digital plus in-office milling," J Am Dent Assoc, Vol.140, No.6, pp.1301-1304, 2009. https://doi.org/10.14219/jada.archive.2009.0054
  4. K. B. May, M. M. Russell, M. E. Razzoog, and B. R. Lang, "Precision of fit:the Procera AllCeram crown," J Prosthet Dent, Vol.80, No.2, pp.394-404, 1993.
  5. A. Mehl, W. Gloger, K. H. Kunzelmann, and R. Hickel, "A new optical 3D device for the detection of wear," J Dent Res, Vol.76, No.5, pp.1799-1807, 1997. https://doi.org/10.1177/00220345970760111201
  6. H. Rudolph, "Computer-aided analysis of the influence of digitizing and surfacing on the accuracy in dental CAD/CAM technology," Computer in biology and medicine, Vol.37, No.6, pp.579-587, 2007. https://doi.org/10.1016/j.compbiomed.2006.05.006
  7. T. Kuroda, N. Motohashi, R. Tominaga, and K. Iwata, "Three-dimensional dental cast analyzing system using laser scanning," Am J Orthod, Vol.110, No.1, pp.365-369, 1996. https://doi.org/10.1016/S0889-5406(96)70036-7
  8. N. Motohashi, and T. Kuroda, "A 3D computer -aided design system applied to diagnosis and treatment planning in orthodontics and orthognathic surgery," European J Orthod, Vol.21, No.3, pp.263-274, 1999. https://doi.org/10.1093/ejo/21.3.263
  9. E. A. Tsitrou, S. E. Northeast, and N. R. Van, "Evaluation of the marginal fit of three margin designs of resin composite crowns using CAD/CAM," J Dent, Vol.35, No.1, pp.68-73, 2007. https://doi.org/10.1016/j.jdent.2006.04.008
  10. A. Bindl and W. H. Mörmann, "Clinical and SEM evaluation of all-ceramic chair-side CAD/CAM generated partial crowns," Eur J Oral Sci, Vol.111, No.2, pp.163-169, 2003. https://doi.org/10.1034/j.1600-0722.2003.00022.x
  11. M. Santoro, S. Galkin, M. Teredesai, O. F. Nicolay, and T. J. Cangialosi, "Comparison of measurements made on digital and plaster models," Am J Orthod Dentofacial Orthop, Vol.124, No.1, pp.101-105, 2003. https://doi.org/10.1016/S0889-5406(03)00152-5
  12. O. Zilberman, J. A. Huggare, and K. A. Parikakis, "Evaluation of the validity of tooth size and arch width measurements using conventional and three - dimensional virtual orthodontic models," Angle Orthod, Vol.73, No.3, pp.301-306, 2003.
  13. M. L. Quimby, K. W. Vig, R. G. Rashid, and A. R. Firestone, "The accuracy and reliability of measurements made on computer-based digital models," Angle Orthod, Vol.74, No.2, pp.298-303, 2004.
  14. B. Creed, H. K. Chung, D. E. Jeryl, J. X. James, and A. Lee, "Comparison of the accuracy of linear measurement obtained from cone beam computerized tomography images and digital models," Semin Orthod, Vol.17, No.2, pp.49-56, 2011. https://doi.org/10.1053/j.sodo.2010.08.010
  15. J. M. Bland and D. G. Altman, "Statistical methods for assessing agreement between two methods of clinical measurement," Int J Nurs Stud, Vol.47, No.3, pp.931-936, 2010. https://doi.org/10.1016/j.ijnurstu.2009.10.001
  16. R. G. Luthard, A. Weber, H. Rudolph, S. Quaas, and M. Walter, "Design and production of dental prosthetic restoration: basic research on dental CAD/CAM technology," Int J Comput Dent, Vol.5, No.3, pp.165-176, 2009.
  17. R. Delong, M. Heinzen, J. S. Hodges, C. C. Ko, and W. H. Douglas, "Accuracy of a system for creating 3D computer models of dental arches," J Dent Res, Vol.90, No.1, pp.434-440, 2003.
  18. L. K. Lin, "A concordance correlation coefficient to evaluate reproducibility," Biometrics, Vol.45, No.3, pp.255-268, 1989. https://doi.org/10.2307/2532051
  19. J. Asquith, T. Gillgrass, and P. Mossey, "Three-dimensional imaging of orthodontic models: a pilot study," Eur J Orthod, Vol.29, No.5, pp.517-522, 2007. https://doi.org/10.1093/ejo/cjm044

Cited by

  1. Suggestions on the Model of Exporting Strategy for the Overseas Dental Prosthetic Restoration Service vol.13, pp.7, 2013, https://doi.org/10.5392/JKCA.2013.13.07.333