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


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.


Dental Digital Model;White Light Scanner;Accuracy;Reliability


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