교합면의 교모형태에 따른 치과용 모형 스캐너의 정확도 평가
Accuracy evaluation of dental model scanner according to occlusal attrition type
김동연, 김지환, 이범일, 이주희, 김원수, 박진영,
소속 상세정보
김동연 ( Kim Dong-Yeon ) - 4RD Dental Laboratory
김지환 ( Kim Ji-Hwan ) - Korea University College of Health Science Science and Engineering Department of Dental Laboratory
이범일 ( Lee Beom-Il ) - Korea University College of Health Science Department of Dental Laboratory Science and Engineering
이주희 ( Lee Ju-Hee ) - Daejeon Health Institute of Technology Department of Dental Laboratory Technology
김원수 ( Kim Won-Soo ) - Daejeon Health Institute of Technology Department of Dental Laboratory Technology
박진영 ( Park Jin-Young ) - Smile Dental Laboratory
Abstract
Purpose: The purpose of this study is to compare and analyze the accuracy of single crownsbased on the type of occlusal surface.
Methods: A single crown wax pattern was fabricated in three types of occlusal surface. Theprepared wax pattern was replicated with silicone, and stone was injected to create a stonemodel. The prepared specimens were scanned using a model scanner. Scans were classifiedinto three groups, and each scan was performed six times to analyze the trueness andprecision of a single crown. In addition, only the occlusal surface area was analyzed for truenessand precision. Data were analyzed using the Kruskal?Wallis H test, a nonparametrictest (α=0.05).
Results: With regard to the trueness value of the occlusal scan area, the no occlusal toothattrition (NA) group showed the largest error of 3.5 μm, and the complete occlusal tooth attrition(CA) group showed the lowest value of 3.1 μm. The NA group had the greatest precision,and the medium occlusal tooth attrition (MA) group and CA group showed a low precisionvalue of 3.2 μm; the difference between the groups was statistically significant (α=0.05). Inthe 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 accuracyof the group without attrition was low. There were significant differences betweengroups, but clinically acceptable values were shown.
키워드
Tooth attrition; Computer-aided design; Precision; Trueness
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