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덴탈 CAD 시스템에서의 임플란트 크라운 자동 Transformation 알고리즘
손진규(Jinkyou Son),남성민(Sungmin Nam),양세웅(Sewoong Yang),이건우(Kunwoo Lee) (사)한국CDE학회 2013 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2013 No.1
“Digital Dentistry” is the most important issue in dental care field, especially on dental implant restoration. Recently, CAD/CAM technics have been used for dental implant design. But it is not effective as expected because many analogue procedures still remain on it. Therefore, it is needed to research about how to reduce user input from dental implant design. In this paper, we suggest an algorithm of automatic transformation of implant crown on dental CAD system. It translates, rotates, scales an implant crown automatically using dental implant library and user-picked 4 points. This algorithm can reduce time consume of dental implant design procedure and the results are well enough to use in field.
인솔 설계 변수에 따른 발목 과-회내 환자의 보행 시 좌우 방향 무릎관절 하중의 변화
이상준(SangJun Lee),백승엽(Seung-Yeob Baek),손진규(JinKyou Son),김동욱(Dongwook Kim),이건우(Kunwoo Lee) (사)한국CDE학회 2012 한국CDE학회 논문집 Vol.17 No.3
The ankle over-pronation causes the mechanical overloading transferred to proximal areas (i.e. knees or hips) over time. Thus, the over-pronation is recognized as a contributory factor in a wide variety of musculo-skeletal pathologies in lower extremities. Commonly, over-pronated ankles are treated using specially designed insoles that support medial heels and correct the posture of lower limbs. However, the biomechanical effects of the insoles are not yet fully understood, so there still are controversies whether such insoles really have clinical significance. In this study, in order to verify the effects of insoles and determine the best shape of the insoles, we examined how the medio-lateral knee joint reaction force changes due to insole conditions through a case study about a subject. As a result, it is revealed that the medial heel post, which drastically reduced the peak medio-lateral knee joint reaction force, has significant effects on the gait of the over-pronated patients. However, in case that the arch support is combined together, the positive effect of the medial heel post may rather decrease.
인솔 설계 변수에 따른 발목 과-회내 환자의 보행 시 좌우 방향 무릎 관절 하중의 변화
이상준(SangJun Lee),백승엽(Seung-Yeob Baek),손진규(JinKyou Son),김동욱(Dongwook Kim),이건우(Kunwoo Lee) (사)한국CDE학회 2012 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2012 No.2
The over-pronation of the knee joint causes the mechanical overloading transferred to proximal areas (i.e. ankles, knees, or hips) over time. Thus, the over-pronation is recognized as a contributory factor in a wide variety of musculo-skeletal pathologies in lower extremities. Commonly, over-pronated ankles are treated using specially designed insoles that support medial heels and correct the posture of lower limbs. However, the biomechanical effects of the insoles are not yet fully understood, so there still are controversies whether such insoles really have clinical significance. In this study, in order to verify the effects of insoles and determine the best shape of the insoles, we examined how the medio-lateral knee joint reaction force changes due to insole conditions. As shape parameters of insoles, the medio-lateral heel post angle and the arch support height were chosen. We then collected marker trajectories and ground reaction forces and moments of one male subject with overpronation walking with different insole conditions. The OpenSim software was employed for the simulation of each trial. Finally, the medio-lateral knee joint reaction force curves of each trial were plotted, and the efficacy of each insole condition was evaluated by comparing their peak values. As a result, it is revealed that the medial heel post, which drastically reduced the peak medio-lateral knee joint reaction force, has significant effects on the gait of the over-pronated patients. However, in case that the arch support is combined together, the positive effect of the medial heel post may rather decrease.