Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Accuracy evaluation of dental model scanner according to occlusal attrition type

교합면의 교모형태에 따른 치과용 모형 스캐너의 정확도 평가

  • Kim, Dong-Yeon (4RD Dental Laboratory) ;
  • Kim, Ji-Hwan (Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University) ;
  • Lee, Beom-Il (Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University) ;
  • Lee, Ju-Hee (Department of Dental Lab Technology, Daejeon Health Institute of Technology) ;
  • Kim, Won-Soo (Department of Dental Lab Technology, Daejeon Health Institute of Technology) ;
  • Park, Jin-Young (Smile Dental Laboratory)
  • 김동연 (폴드 치과기공소) ;
  • 김지환 (고려대학교 일반대학원 보건과학과 치의기공전공) ;
  • 이범일 (고려대학교 일반대학원 보건과학과 치의기공전공) ;
  • 이주희 (대전보건대학교 치기공과) ;
  • 김원수 (대전보건대학교 치기공과) ;
  • 박진영 (스마일치과기공소)
  • Received : 2020.10.30
  • Accepted : 2020.11.23
  • Published : 2020.12.30
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Abstract

Purpose: The purpose of this study is to compare and analyze the accuracy of single crowns based on the type of occlusal surface. Methods: A single crown wax pattern was fabricated in three types of occlusal surface. The prepared wax pattern was replicated with silicone, and stone was injected to create a stone model. The prepared specimens were scanned using a model scanner. Scans were classified into three groups, and each scan was performed six times to analyze the trueness and precision of a single crown. In addition, only the occlusal surface area was analyzed for trueness and precision. Data were analyzed using the Kruskal-Wallis H test, a nonparametric test (α=0.05). Results: With regard to the trueness value of the occlusal scan area, the no occlusal tooth attrition (NA) group showed the largest error of 3.5 ㎛, and the complete occlusal tooth attrition (CA) group showed the lowest value of 3.1 ㎛. The NA group had the greatest precision, and the medium occlusal tooth attrition (MA) group and CA group showed a low precision value of 3.2 ㎛; the difference between the groups was statistically significant (α=0.05). In the color difference map, the CA group showed a lower error than the NA group. Conclusion: The occlusal surface with severe attrition had excellent accuracy, but the accuracy of the group without attrition was low. There were significant differences between groups, but clinically acceptable values were shown.

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References

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