title: Efficient digitalization method for dental restorations using micro-CT data.
abstract: The objective of this study was to demonstrate the feasibility of using micro-CT scan of dental impressions for fabricating dental restorations and to compare the dimensional accuracy of dental models generated from various methods. The key idea of the proposed protocol is that dental impression of patients can be accurately digitized by micro-CT scan and that one can make digital cast model from micro-CT data directly. As air regions of the micro-CT scan data of dental impression are equivalent to the real teeth and surrounding structures, one can segment the air regions and fabricate digital cast model in the STL format out of them. The proposed method was validated by a phantom study using a typodont with prepared teeth. Actual measurement and deviation map analysis were performed after acquiring digital cast models for each restoration methods. Comparisons of the milled restorations were also performed by placing them on the prepared teeth of typodont. The results demonstrated that an efficient fabrication of precise dental restoration is achievable by use of the proposed method.
authors.affiliation: KAIST, Department of Nuclear and Quantum Engineering, Daejeon, 34141, Republic of Korea.
authors.forename: Changhwan
authors.initials: C
authors.lastname: Kim
authors.affiliation: Guidance Dental, Buena Park, California, 90621, USA.
authors.forename: Seung Hoon
authors.initials: SH
authors.lastname: Baek
authors.affiliation: KAIST, Department of Nuclear and Quantum Engineering, Daejeon, 34141, Republic of Korea.
authors.forename: Taewon
authors.initials: T
authors.lastname: Lee
authors.affiliation: Kyung Hee University, Department of Conservative Dentistry, School of Dentistry, Seoul, 02447, Republic of Korea.
authors.forename: Jonggun
authors.initials: J
authors.lastname: Go
authors.affiliation: Kyung Hee University, Department of Conservative Dentistry, School of Dentistry, Seoul, 02447, Republic of Korea.
authors.forename: Sun Young
authors.initials: SY
authors.lastname: Kim
authors.affiliation: KAIST, Department of Nuclear and Quantum Engineering, Daejeon, 34141, Republic of Korea.
authors.forename: Seungryong
authors.initials: S
authors.lastname: Cho
mesh_terms: D017076:Computer-Aided Design; D003729:Dental Care; D003761:Dental Impression Technique; D003793:Dental Restoration, Permanent / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D003765:Models, Dental; D055114:X-Ray Microtomography / Q000379:methods*