Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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The study on the dimensional stability of digitized dental stone replicas according to difference color of gypsum materials

치과용 모형재 색상에 따른 디지털 모형의 체적 안정성 연구

  • Choi, Seog-Soon (Dept. of Dental Technology, Shingu University) ;
  • Kim, Ki-Baek (Department of Health Science Specialized in Dental Lab. Science & Engineering, Graduate School, Korea University) ;
  • Lee, Gyeong-Tak (Department of Health Science Specialized in Dental Lab. Science & Engineering, Graduate School, Korea University) ;
  • Jeon, Jin-Hun (Department of Health Science Specialized in Dental Lab. Science & Engineering, Graduate School, Korea University) ;
  • Kim, Jae-Hong (Department of Health Science Specialized in Dental Lab. Science & Engineering, Graduate School, Korea University)
  • 최석순 (신구대학교 치기공과) ;
  • 김기백 (고려대학교 대학원 보건과학과 치의기공전공) ;
  • 이경탁 (고려대학교 대학원 보건과학과 치의기공전공) ;
  • 전진훈 (고려대학교 대학원 보건과학과 치의기공전공) ;
  • 김재홍 (고려대학교 대학원 보건과학과 치의기공전공)
  • Received : 2012.09.14
  • Accepted : 2012.12.24
  • Published : 2012.12.30
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Abstract

Purpose: The aim of study was to compare the dimensional stability of digitized dental stone replica using different color of gypsum materials using a white light scanner with three-dimensional software. Methods: A master model(500B-1, Nissin dental product, Japan) with the prepared lower full arch tooth was used. Several type IV stones(white, yellow, green) were used for 30 stone casts(10 casts each) duplicated a master model of mandible. The master model and the replicas were digitized with the non-contacting white light scanner to create 3-dimensional digital models. The linear distance between the reference points were measured and analyzed on the Delcam Copycad$^{(R)}$(Delcam plc, UK) 3D graphic software. One-way analysis of variance(ANOVA) combined with a Tukey multiple-range test were used to analysis the data(${\alpha}$=0.05). Results: There were considerable differences in mean values between gypsum materials within each color(white, yellow, green), and this difference was statistically significant, p=0.001. Conclusion: Digitization of dental materials on optical scanner was affected by color. Three different color of gypsum materials showed clinically acceptable accuracies of full arch digital model produced by them. Besides, these results will have to be confirmed in further clinical studies.

Keywords

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