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Introduction of In-Office Three-Dimensional Virtual Setup of Digital Orthodontic Models
성장원,경희문,성재현,백승학 대한치과교정학회 2019 대한치과교정학회 임상저널 Vol.9 No.4
The purpose of this article was to introduce guidelines and a protocol for in-office 3D virtual setup of digital orthodontic models by clinicians with experience in using currently available orthodontic virtual setup software. The procedure for 3D virtual setup consists of pre-setup preparation, crown movement, and post-setup evaluation. In the first step, the crowns in the digital model are prepared to allow the movement of individual crowns in the 3D virtual space. During the second step, a new occlusion is completed by moving the crowns according to the properly selected arch form and prescription. In the final step, the setup result was evaluated by using visual inspection tools or numeric comparison tools, which are only available in virtual setup software. Establishment of standard protocols and advancement in automatic functions can lead to faster and more accurate 3D virtual setup.
HVAC 시스템 성능평가를 위한 시스템 구현방법에 관한 연구
이승재(Lee Seung-Jae),신대욱(Shin Dae-Uk),박소정(Park So-Jeong),조구상(Joe Goo-Sang),여명석(Yeo Myoung-Souk),김광우(Kim Kwang-Woo) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(계획계)
In this study, a system of an experimental setup was investigated for HVAC system on laboratory experiment scale particularly. For the process for experimental setup, elements needed for the objective of experiment were analysed and the elements of the system were obtained. At this point, a study of system setup method to determine the experimental setup concerning relations among factors of the system was performed for which is applied it to a performance assesment. Through this study, it is systematized to classify ‘real system’ and ‘virtual system’ according to significance of the realization of experiment and justifies the way to determine the optimization method of performance assesment.
Orthodontic treatment using mini-tube appliances and customized resin domes using 3D CAD design
( Hye-in Kim ),( Sung-hoon Lim ),( Sung-nam Gang ) 조선대학교 구강생물학연구소 2016 Oral Biology Research (Oral Biol Res) Vol.40 No.3
Mini-tube appliances can be used instead of orthodontic brackets and tubes. This mini-tube is a simple tube without a bonding base and bonded to the tooth by covering the tube with flowable resin. It is more esthetic and hygienic, although there is a limitation that only NiTi wires can be inserted into the mini-tube appliance. However, this mini-tube has no pre-adjusted in-and-out compensations, and therefore wire bending is required for finishing. This report describes a Class I crowding case treated with mini-tubes and customized resin domes using a virtual setup, 3-dimensional (3D) computer-aided design (CAD) and 3D printing. By this customization, wire bending or repositioning of mini-tubes was minimized, and treatment was performed with fewer adjustments and increased patient’s comfort.
프린지 투영법을 이용한 실시간 3D 구강 내 스캐너의 개발
Furqan Ullah,이건수(Gunn Soo Lee),박강(Kang Park) (사)한국CDE학회 2012 한국CDE학회 논문집 Vol.17 No.3
Real-time three-dimensional shape measurement is becoming increasingly important in various fields, including medical sciences, high-technology industry, and microscale measurements. However, there are not so many 3D profile tools specially designed for specifically narrow space, for example, to scan the tooth shape of a human jaw. In this paper, a real-time 3D intraoral scanner is proposed for the measurement of tooth profile in the mouth cavity. The proposed system comprises a laser diode beam, a micro charge-coupled device, a graticule, a piezoelectric transducer, a set of optical lenses, and a polhemus device sensor. The phase-shifting technique is used along with an accurate calibration method for the measurement of the tooth profile. Experimental and theoretical inspection of the phase-to-coordinate relation is presented. In addition, a nonlinear system model is developed for collimating illumination that gives the more accurate mathematical representation of the system, thus improves the shape measurement accuracy. Experiment results are presented to verify the feasibility and performance of the developed system. The experimental results indicate that overall measurement error accuracy can be controlled within 0.4 ㎜ with a variability of ±0.01.
Fringe 투영법을 이용한 실시간 3D 구강내 스캐너의 개발
펄칸 울라(Furqan Ullah),박강(Kang Park) (사)한국CDE학회 2012 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2012 No.2
Real-time three-dimensional shape measurement is becoming increasingly important in various fields, including medical sciences, high-technology industry, and microscale measurements. However, there are not so many 3D profile tools specially designed for specifically narrow space, for example, to scan the tooth shape of a human jaw. In this paper, a real-time 3D intraoral scanner is proposed for the measurement of tooth profile in the mouth cavity. The proposed system comprises a laser diode beam, a micro charge-coupled device, a graticule, a piezoelectric transducer, a set of optical lenses, and a polhemus device sensor. The phase-shifting technique is used along with an accurate calibration method for the measurement of the tooth profile. Experimental and theoretical inspection of the phase-to-coordinate relation is presented. In addition, a nonlinear system model is developed for collimating illumination that gives the more accurate mathematical representation of the system, thus improves the shape measurement accuracy. Experiment results are presented to verify the feasibility and performance of the developed system. The experimental results indicate that overall measurement error accuracy can be controlled within 0.4 mm with a variability of ±0.01.