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$Br{\aa}nemark\;Novum^{(R)}$ 즉시 임플랜트 보철 수복 방법에 관한 삼차원 유한요소 분석적 연구
김우영,김영수,장경수,김창회,Kim Woo-Young,Kim Yung-Soo,Jang Kyung-Soo,Kim Chang-Whe 대한치과보철학회 2001 대한치과보철학회지 Vol.39 No.5
Since the treatment of edentulous patients with osseointegrated implant was first introduced more than 30 years ago, implant therapy has become one of the most important dental treatment modalities today. Based on the previous experience and knowledge, $Br{\aa}nemark\;Novum^{(R)}$ protocol was introduced with the concept of simplifying surgical and prosthetic technique and reducing healing time recently. This protocol recommends the installation of three 5mm wide diameter futures in anterior mandible and the prefabricated titanium bars for superstructure fabrication. This study was designed to analyze the stress distribution at fixture and superstructure area according to changes of fixture number, diameter and superstructure materials. Four 3-dimensional finite element models were fabricated. Model 1 - 5 standard fixtures (13mm long and 3.75mm in diameter) & superstructure consisted of type IV gold alloy and resin Model 2- 3 wide diameter fixtures (13mm long and 5.0mm in diameter) & superstructure consisted of type IV gold alloy and resin Model 3-3 wide diameter fixtures (13mm long and 5.0mm in diameter) & superstructure consisted of titanium and resin Model 4-3 wide diameter fixtures (13mm long and 5.0mm in diameter) & superstructure consisted of titanium and porcelain A 150N occlusal force was applied on the 1st molar of each model in 3 directions - vertical($90^{\circ}$), horizontal($0^{\circ}$) and oblique($120^{\circ}$). After analyzing the stresses and displacements, following results were obtained. 1. There were no significant difference in stress distribution among experimental models. 2. Model 2, 3, 4 showed less amount of compressive stress than that of model 1. However, tensile stress was similar. 3. Veneer material with a high modulus of elasticity demonstrated less stress accumulation in the superstructure. Within the limites of this study, $Br{\aa}nemark\;Novum^{(R)}$ protocol demonstrated comparable biomechanical properties to conventional protocol.
한의학적 치료법으로 호전된 요추 추간판 탈출증 환자의 영상의학적 변화
김우영,한상엽,김기역,공덕현,이현종,김창연,남항우,Kim, Wu-Young,Han, Sang-Yup,Kim, Ki-Yuk,Kong, Duck-Hyun,Lee, Hyun-Jong,Kim, Chang-Youn,Nam, Hang-Woo 척추신경추나의학회 2009 척추신경추나의학회지 Vol.4 No.1
Objectives: The aim of this study was to evaluate the evolution of lumbar disc herniation in patients treated with oriental medicine. Methods: 14patients(15 cases) with lumbar disc herniation proved at MRI(Magnetic resonance imaging) underwent a follow-up MRI study. Follow-up MRI was performed $4{\sim}14$months(mean 7 months) after initial MRI. Results & Conclusions: 1. 13 cases(87%) had reduction of disc herniation. 1 showed no change in amount of disc herniation. 1 had an increase in disc herniation. 2. Comparison initial MRI with follow-up MRI showed that 2 of the herniations decreased between 0% and 25%, 3 decreased between 25% and 50%, 5 decreased between 50% and 75%, 3 decreased between 75% and 100%. The size of the herniation decreased on average by 49% in 14patients(15 cases). 3. On axial images, the proportion of the cross-sectional area of the spinal canal occupied by the herniated disc was 54.41% on the average on the initial scan, 29.65% on the follow-up scan.
광반응 재료가 코팅된 단주기 광섬유격자 기반 자외선센서의 광민감도 향상 연구
김우영,김찬영,김현경,안태정,Kim, Woo Young,Kim, Chan-Young,Kim, Hyun-Kyoung,Ahn, Tae-Jung 한국광학회 2015 한국광학회지 Vol.26 No.2
This study was focused on developing an optical sensor that monitors ultraviolet (UV) light. Recently, we proposed and demonstrated a novel, highly sensitive UV sensor based on a fiber Bragg grating (FBG). To ensure that the incident UV light is focused on the FBG surface, the sensor was coated with an azobenzene polymer material that acts as a UV-induced stretchable functional material, in combination with a cylindrical focal lens. In this study we have improved the sensitivity of the sensor by employing a cylindrical focal mirror as a curved reflector, to refocus the UV light passing through the FBG. We considered the performance of several different types of reflectors and chose the optimal radius of curvature for the reflector. Compared to the UV sensor without an auxiliary device, the sensitivity of the FBG sensor with a focal lens and a curved reflector was 15 times as high. 본 논문은 자외선 광학센서 개발에 관한 것이다. 기존에 반도체 기반 자외선 센서를 대체하기 위해 개발된 단주기 광섬유격자기반 자외선 센서에 대한 측정 민감도를 향상시키기 위한 다양한 장치들을 설계하고 실험을 통해 성능을 확인하였다. 최근 연구를 통해 자외선 흡수에 따라 인장력이 유도되는 아조벤젠 폴리머 재료와 장력에 따른 광섬유격자 특성 변화를 조합하여 새로운 자외선 센서의 개념이 제시되었다. 본 연구에서는 광섬유격자 기반 자외선 센서에서 흡수하지 못하고 통과되는 자외선 잔광을 반사판을 이용해서 다시 반사시켜 센서에서 재흡수되는 원리로 센서의 민감도를 향상시켰다. 본 논문에서는 반사판의 종류를 선정하고 반사판의 곡률반경을 최적화하였다. 또한 기존의 원통형 집광렌즈를 이용한 민감도 향상 기술을 접목 시켜 아무런 장치가 없을 때와 비교해서 약 15배의 성능을 향상시키는 결과를 얻었다. 또한 외부 환경 효과를 줄이기 위한 패키지 모듈을 제작하여 적용하고 그 특성을 분석하였다.
김우영,A. Gladkov,V. Kavtanyuk,선용근,C. C. Yun,J. W. Kim 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.3
Polarized rare isotope (RI) beams have been designed at the Rare Isotope Science Project (RISP)for the study of the nuclear-structure, nuclear-reaction and astrophysics experiments. A powerfulmethod has been adopted for this work − the production of polarized RI beams via projectilefragmentation. The in-flight system line was designed for this purpose at the RISP by using theprojectile fragmentation method. The working principle, schematic design and experiments to beperformed at the RISP will be presented.
김우영,이재영,한상엽,공덕현,박재영,이현종,Kim, Wu-Young,Lee, Jae-Young,Han, Sang-Yup,Kong, Deok-Hyun,Park, Jai-Young,Lee, Hyun-Jong 척추신경추나의학회 2010 척추신경추나의학회지 Vol.5 No.2
단순 방사선검사와 이학적 검사에서 특이 소견을 발견할 수 없는 발음성 고관절 환자에서 대전자의 움직임을 통해 고관절의 움직임 이상을 발견하고 경근추나를 시행하였다. 1. 환자분이 복와위에서 능동적 신전운동, 앙와위에서 능동적 굴곡운동을 하는 동안 환자의 대전자를 통해 고관절이 전내측 방향으로 움직임을 관찰하였다. 2. 고관절의 전내측 방향으로 움직임의 과도를 유발할 수 있는 대퇴근막장근과 슬괵근의 단축을 평가하고 경근이완기법을 적용하였다. 3. 슬곽근에 대항작용을 하고 고관절이 관골구내에서 안정성을 유지하기 위해 필요한 대둔근, 대퇴근막장근에 대항작용을 할 수 있는 후중둔근과 장요근의 약화를 관찰하고 경근강화기법을 시행하였다. 4. 13회의 치료 후 발음성고관절의 주증상인 통증과 탄발음이 거의 소실되는 양호한 결과를 얻었다. 5. 고관절의 움직임 이상이 발견된 발음성 고관절 환자에서 해당 경근의 단축과 약화가 발견될 경우 경근추나수기법을 이용해 볼 수 있을 것으로 판단된다. Objectives : This study is designed to evaluate the effect of conservative oriental medical treatment using Chuna manual therapy for meridian sinew system for snapping hip patient who have hip joint movement system impairment. Methods : 28-year old snapping hip patient who have hip joint movement system impairment was treated with conservative oriental medical treatment using Chuna manual therapy for meridian sinew system. The improvement of the patient was evaluated by Numerical rating scale(NRS), Snapping Sound Degree(SSD), Range of Motion(ROM). Results: After 13 times treatment, the patient had significant improvement in Numerical rating scale(NRS), Snapping Sound Degree(SSD), Range of Motion(ROM). Conclusions: If hip joint movement system impairment cause a snapping hip, we can treat with Chuna manual therapy for meridian sinew system.