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총 389건 검색
본문검색 결과만 보기
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Characterization of Surfaces by Contact Angle Goniometry - I. Contact Angle Measurement by Laser Beam Projection-
박정희, Park. Chung Hee 한국의류학회 한국의류학회지 6 Pages
한국의류학회 한국의류학회지 1991, Vol.15 No.1 70-75 (6 pages)
아니라 직격이 가는 섬유를 포함한 굴곡진 표면에서는 stationary, advancing그리고 receding contact angle-을 신속하고 정확하게 측정할 수 있게 하여 준다. 가는 레이저광선이 액체와 고체사이 계면의 끝을 통과하여 tangent screen의 각도를 재는 눈금상에 중심으로부터 방사상으로 두개의 선이 나타나게 된다. 이때 눈금상에 투영된 두개의 레이저광선 사이의 각도를 접촉각으로 결정한다. 이 새로운 기구를 사용한 결과, PMMA(Perspex-CQ)상에서의 접촉각은 문헌상의 접촉각과 일치함으로써 간편하고 정확한 접촉각 측정법임을... -
Change in Water Contact Angle of Carbon Contaminated TiO2 Surfaces by High-energy Electron Beam
Kim. Kwang-Dae, Tai. Wei Sheng, Kim. Young-Dok, Cho. Sang-Jin, Bae. In-Seob, Boo. Jin-Hyo, Lee. Byung-Cheol, Yang. Ki-Ho, Pack. Ok-Kyung 대한화학회 Bulletin of the Korean Chemical Society 4 Pages
대한화학회 Bulletin of the Korean Chemical Society 2009, Vol.30 No.5 1067-1070 (4 pages)
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Effect of contact angle and drop spacing on the bulging frequency of inkjet-printed silver lines on FC-coated glass
Moon. Yoon Jae, Kang. Heuiseok, Lee. Sang Ho, Kang. Kyungtae, Cho. Young June, Hwang. Jun Young, Moon. Seung Jae 대한기계학회 Journal of mechanical science and technology 8 Pages
대한기계학회 Journal of mechanical science and technology 2014, Vol.28 No.4 1441-1448 (8 pages)
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The effect of applying a head-weight device on cervical angle and pain of neck muscles
Jin-Hong Kim, Jong-Gun Kim, Kwang-Sun Do, Jong-eun Yim 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 2호 8 101-105 (5 pages)
measure the change in pain threshold of levator scapular muscle, carniovertebral angle, and head position angle when applying a head-weight device on healthy adult. Design: Cross-sectional study. Methods: This study was conducted with 21 healthy adult male and female who voluntarily agreed to participate in this study after being informed of the purpose and method of this study. After measuring the cervical angle and pain threshold of levator scapular muscle, subject was instructed to walk for 5... -
Effects of intertrochanteric varus osteotomy on Norberg angle and percent coverage of the femoral head in displastic dogs
Stefania Pinna*, Enrico Pizzuti, Fabio Carli 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2013, 제 14권 제 2호 10 185-191 (7 pages)
varus osteotomy on joint congruency in dogs affected by early stage hip dysplasia. Preoperative planning to move the femoral head within the acetabulum was carried out. Varisation of the femoral inclination angle (fIA) was achieved by Intertrochanteric Osteotomy (ITO). Norberg angle (NA), percent coverage (PC) of the femoral head by the acetabulum and fIA was measured from preoperative, immediate postoperative and first and second recheck radiographs of seven dogs that underwent an ITO (joint n... -
A study on the contact angles of a water droplet on smooth and rough solid surfaces
Park. Ju-Young, Ha. Man-Yeong, Choi. Ho-Jin, Hong. Seung-Do, Yoon. Hyun-Sik 대한기계학회 Journal of mechanical science and technology 10 Pages
대한기계학회 Journal of mechanical science and technology 2011, Vol.25 No.2 323-332 (10 pages)
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레이저빔을 이용한 시각적 생체 되먹임이 전방 런지운동 시 안쪽넓은근과 가쪽넓 은근의 근 활성도에 미치는 영향
공치완, 오재섭, 김미현, 안덕현, 성진욱 한국임상움직임치료학회 한국임상움직임치료학회지 8 Pages
한국임상움직임치료학회 한국임상움직임치료학회지 2021, 제 1권 제 1호 2 9-16 (8 pages)
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Osteokinematic analysis during shoulder abduction using the C-arm
Seung Hoo Lee, Young-hoon Kim, Dong Geon Lee, Kyeong-Bong Lee, Gyu Chang Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2017, 제 6권 제 4호 9 208-213 (6 pages)
Objective: Despite reliable evidence of abnormal scapular motions increases, there is not yet sufficient evidence of abnormal humeral translations. This study aims to analyze the motion of the humeral head toward the scapula when the shoulder is actively abducted using the C-arm. Design: A case report. Methods: The participant was a healthy man without any limitation and pain during shoulder movement. The participant’s shoulder was abducted; this movement in the frontal plane was measured using... -
Effects of real-time feedback training on weight shifting during golf swinging on golf performance in amateur golfers
Ji-Hyun Hwang, Ho-Suk Choi, Won-Seob Shin 물리치료재활과학회 Physical Therapy Rehabilitation Science 7 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2017, 제 6권 제 4호 6 189-195 (7 pages)
a high-speed 3-dimensional camera sensor which analyses the shot distance, ball velocity, vertical launch angle, horizontal launch angle, back spin velocity and side spin velocity. The COP trajectory was assessed during 10 practice sessions and the mean was used. The golf performance measurement was repeated three times and its mean value was used. The assessment and training were performed at 24-hour intervals. Results: After training sessions, the change in shot distance, ball velocity, and... -
Changes of abdominal muscle thickness during stable and unstable surface bridging exercise in young people
Tae Hoon Kim, Joo-hee Hahn, Ju-Ri Jeong, Chang-joo Lee, You Jin Kim, Sung Min Choi, Da Young Jeon, Jin Hwa Lee, In-Hyuk Lim, Wan-Hee Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 4호 8 210-214 (5 pages)
Objective: The aim of this study was to measure the muscle architectural parameters of abdominal muscles in healthy individuals by rehabilitative ultrasound imaging (RUSI) and to investigate their changes after bridging exercise in various environments. Design: Cross-sectional study. Methods: The study included 40 healthy participants (19 men, 21 women). Subjects were randomly allocated to a stable surface group (SG, n=20) or an unstable surface group (UG, n=20). The participants assumed three... -
Effect of light touch on body sway during a stable posture with blocked visual information
Jong-Gun Kim, Jin-Hong Kim, Kwang-Sun Do, Jong-eun Yim 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 3호 5 138-142 (5 pages)
Objective: The purpose of this study was to investigate how light touch with a finger affects balance ability when a posture is maintained in the condition of visual information blockage and to provide a fundamental material for developing balance ability in the process of rehabilitation treatment. Design: Cross-sectional study. Methods: The study subjects were 17 healthy men and women in their twenties and thirties who were studying at S University in Seoul. The system was comprised of an... -
Changes in lower extremity alignment in standing position using a foot plate
Hye-Mi Lee, Ji-Eun Yang, Ju-Yeon Lee, Hong-Jun Im, Yu-Jin Jeong, Dae-Sung Park 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 3호 4 132-137 (6 pages)
The angle was significantly increased at the horizontal rotation angle of the shank, thigh, and ankle without anterior rotation of the pelvis (p<0.05). The maximum horizontal rotation angle at the thigh on 20° was −4.52° in static, and −3.10° in the dynamic conditions compared to 0°. Conclusions: Increased unilateral foot pronation, thigh, shank, ankle horizontal rotation variance was significantly effective. The observation of the changes in foot abduction with the use of a... -
Comparison of the thickness of the gastrocnemius through ultrasonography during heel-drop exercise performance
Dan-Bee Gal, Su-Young Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 2호 6 89-94 (6 pages)
Objective: This study was aimed to compare the thickness and pennation angle of gastrocnemius through ultrasonography during the heel-drop exercise on ankle dorsiflexion angle. Design: Cross-sectional study. Methods: Nineteen normal adults in their 20s had voluntarily participated in this study. All subjects performed the ankle heel-drop exercise with ankle dorsiflexed to 0°, 10°, and 20°: heel-drop exercise with ankle dorsiflexed to 0° was executed on floor-level, heel-drop exercise with... -
Influence of mobile phone texting on gait parameters during ramp ascent and descent
Hyun-jin Kim, Jae-myoung Park, Jae-yun Cha, Chang-Ho Song 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2014, 제 3권 제 1호 8 43-48 (6 pages)
5° angle. All participants were touch screen mobile phone users. Four walking conditions were used: 1) ramp ascent, 2) ramp descent, 3) texting during ramp ascent, and 4) texting during ramp descent. In conditions 3) and 4), subjects texted the words of “Aegukga”−the song of patriotism−while walking. Upon the signal of start, the subjects walked the ramp during texting. Gait parameters were measured at the length of 3 m excluding 1 m of the start and end of the total length. Each... -
Students’ attitudes toward online learning during the pandemic era -focusing on practice courses at a university of education
Lee Yun-Jung 경인교육대학교 교육연구원 The Journal of Education 18 Pages
경인교육대학교 교육연구원 The Journal of Education 2020, Vol.3 No.2 4 59-76 (18 pages)
Through a survey conducted among 64 students at a Gyeongin university of education during the COVID-19 pandemic, this research explores students’ attitude toward online learning, compares them with previous research outcomes, invites student suggestions for better learning, and analyzes their responses to find any intrinsic structure of learning performance. In a similar way to previous research, this study produces the pros (strength) and cons (weakness) of online education as follows. First,... -
Non-invasive quantification of hepatic fat content in healthy dogs by using proton magnetic resonance spectroscopy and dual gradient echo magnetic resonance imaging
Francesca Del Chicca, Andrea Schwarz, Dieter Meier, Paula Grest, Annette Liesegang, Patrick R. Kircher 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 4호 14 570-576 (7 pages)
The objective of the present study was to describe two non-invasive methods for fat quantification in normal canine liver by using magnetic resonance imaging (MRI) and spectroscopy. Eleven adult beagle dogs were anesthetized and underwent magnetic resonance examination of the cranial abdomen by performing morphologic, modified Dixon (mDixon) dual gradient echo sequence, and proton magnetic resonance spectroscopy (1H MRS) imaging. In addition, ultrasonographic liver examination was performed,... -
Changes in hoof kinetics and kinematics at walk in response to hoof trimming
Babak Faramarzi, An Nguyen, Fanglong Dong 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 4호 12 557-562 (6 pages)
when p ＜ 0.05. Vertical force (p = 0.026) and contact pressure (p = 0.006) increased after trimming. Stance-phase duration (p = 0.006), swing-phase duration (p = .023), and gait-cycle duration (p = 0.007) decreased significantly post-trimming. The observed changes in kinetic and kinematic parameters were related to hoof trimming. The reported results underline the importance of farriery practice and its effect on hoof biomechanics, which should be considered by both farriers and veterinarians. -
Prevalence, toxin gene profile, antibiotic resistance, and molecular characterization of Clostridium perfringens from diarrheic and non-diarrheic dogs in Korea
Jung-Whan Chon, Kun-Ho Seo, Dongryeoul Bae, Ji-Hee Park, Saeed Khan, Kidon Sung 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 3호 6 368-374 (7 pages)
Clostridium perfringens causes diarrhea and other diseases in animals and humans. We investigated the prevalence, toxin gene profiles, and antibiotic resistance of C. perfringens isolated from diarrheic dogs (DD) and non-diarrheic dogs (ND) in two animal hospitals in Seoul, Korea. Fecal samples were collected from clinically DD (n = 49) and ND (n = 34). C. perfringens was isolated from 31 of 49 DD (63.3%) and 21 of 34 ND dogs (61.8%). All C. perfringens strains were positive for the ... -
Comparison of three skin-stretching devices for closing skin defects on the limbs of dogs
Vassiliki Tsioli, Lysimachos G. Papazoglou, Nikolaos Papaioannou, Dimitra Psalla, Ioannis Savvas, Leonidas Pavlidis, Ma 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2015, 제 16권 제 1호 13 99-106 (8 pages)
Our objective was to evaluate the effectiveness of skin-stretching devices for closing defects on the extremities of dogs. Antebrachial skin defects were created on the limbs of 24 dogs randomly divided into three groups. Skin stretchers included staples and sutures passing through them (group A), sutures and hypodermic needles (group B), and Pavletic device (group C). Wounds on the left were further undermined in all groups. Tension and blood perfusion were assessed.... -
Comparing the osteogenic potential of canine mesenchymal stem cells derived from adipose tissues, bone marrow, umbilical cord blood, and Wharton's jelly for treating bone defects
Byung-Jae Kang, Hak-Hyun Ryu, Sung Su Park, Yoshihisa Koyama, Masanori Kikuchi, Heung-Myong Woo, Wan Hee Kim, Oh-Kyeong Kweon* 대한수의학회 Journal of Veterinary Science 12 Pages
대한수의학회 Journal of Veterinary Science 2012, 제 13권 제 3호 12 299-310 (12 pages)
Alternative sources of mesenchymal stem cells (MSCs) for replacing bone marrow (BM) have been extensively investigated in the field of bone tissue engineering. The purpose of this study was to compare the osteogenic potential of canine MSCs derived from adipose tissue (AT), BM, umbilical cord blood (UCB), and Wharton's jelly (WJ) using in vitro culture techniques and in vivo orthotopic implantation assays. After canine MSCs were isolated from various tissues, the proliferation and osteogenic... -
Evaluation of the Perkins handheld applanation tonometer in horses and cattle
Silvia Franco Andrade, Daniel Silva Kupper, Luiz Fernando Rodrigues de Pinho, Elizabeth Cunha Franco, Marcus Vin?cius Felix Fabr 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2011, 제 12권 제 2호 10 171-176 (6 pages)
The objective of this study was to evaluate and validate the accuracy of the Perkins handheld applanation tonometer for measuring intraocular pressure (IOP) in horses and cattle. Both eyes of 10 adult horses and cattle were evaluated in a postmortem study. The eyes from 10 clinically normal adult horses and cattle were also examined after bilateral auriculopalpebral nerve block and topical anesthesia for an in vivo study. IOP was measured postmortem using direct manometry (measured with an... -
Birth of puppies after intrauterine and intratubal insemination with frozen-thawed canine semen
Hye Jin Kim, Hyun Ju Oh, Goo Jang, Min Kyu Kim 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 1호 11 75-80 (6 pages)
The present study was performed to assess the fertility of frozen-thawed dog semen prepared by freezing with 6% glycerol and thawing at 70ºC for 8 sec, and to evaluate the least number of post-thaw spermatozoa necessary to achieve pregnancy by intrauterine or intratubal artificial insemination. It was found that the pregnancy rate of intrauterine artificial insemination was 100% using 6% glycerol buffer and thawing at 70ºC for 8 sec with 5 × 107 spermatozoa. Even though the pregnancy rate... -
Successful pregnancy following surgical intrauterine insemination using frozen semen in Afghan hound dog
HyeJinKim, HyunJuOh, GooJang, JungHeeYoon, HyungSukLee, SangCheolKim, CheolYoungHwang, DaeYongKim, MinKyuKim 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 4 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2007, 제 47권 제 1호 19 135-138 (4 pages)
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관악기 연주가 유발할 수 있는 구강 안면 질환
문호진(HoJin Moon) 한국음악교육공학회 음악교육공학 14 Pages
한국음악교육공학회 음악교육공학 2017, 제 30호 12 217-230 (14 pages)
관악기는 앙부슈어를 취해 연주하므로 다른 악기들과 구분이 된다. 입 주위의 근육과 골격, 치아, 입술, 혀가 연주에 능동적으로 참여하는 것이다. 더불어 폐로부터의 호흡이 악기에 전달되고 두 손이 운지를 담당하므로 취주는 호흡과 앙부슈어, 운지를 완수하기 위한 근신경계의 능동적인 프로세스라고 정의할 수 있다. 악기 연습과 공연 연주가 이 복잡한 프로세스를 집중하므로 과하게 반복된 동작은 앙부슈어 관련 신체구조에 질환과 외상을 유발하기도 한다. 이에 본 연구는 국내외 취주악기 연주자 질환 보고에 대한... -
Effects of continuous force application for extrusive tipping movement on periapical root resorption in the rat mandibular first molar
Yoshiro Matsumoto, Siripen Sringkarnboriboon, Takashi Ono 대한치과교정학회 The Korean Journal of Orthodontics 7 Pages
대한치과교정학회 The Korean Journal of Orthodontics 2018, 제 48권 제 5호 8 339-345 (7 pages)
Objective: The purpose of this study was to clarify the effects of continuous force application for extrusive tipping movement and occlusal interference on periapical root resorption in the rat mandibular first molar. Methods: We constructed an appliance comprising a titanium screw implant with a cobalt– chromium post as the anchorage unit and a nickel–titanium closed coil spring (50 cN) as the active unit. Force was applied on the mandibular left first molar of rats for 8 (n = 10)... -
Displacement and stress distribution of the maxillofacial complex during maxillary protraction using palatal plates
Jusuk Eom, Mohamed Bayome, Jae Hyun Park, Hee Jin Lim, Yoon-Ah Kook, Seong Ho Han 대한치과교정학회 The Korean Journal of Orthodontics 12 Pages
대한치과교정학회 The Korean Journal of Orthodontics 2018, 제 48권 제 5호 4 304-315 (12 pages)
Objective: The purpose of this study was to analyze initial displacement and stress distribution of the maxillofacial complex during dentoskeletal maxillary protraction with various appliance designs placed on the palatal region by using three-dimensional finite element analysis. Methods: Six models of maxillary protraction were developed: conventional facemask (Type A), facemask with dentoskeletal hybrid anchorage (Type B), facemask with a palatal plate (Type C), intraoral traction using a... -
Histomorphometric evaluation of the bone surrounding orthodontic miniscrews according to their adjacent root proximity
Hyun-Ju Oh, Jung-Yul Cha, Hyung-Seog Yu, Chung-Ju Hwang 대한치과교정학회 The Korean Journal of Orthodontics 9 Pages
대한치과교정학회 The Korean Journal of Orthodontics 2018, 제 48권 제 5호 2 283-291 (9 pages)
in the bone–implant contact (BIC, %) among the root proximity groups and loading time groups were determined using statistical analyses. Results: No BIC was observed within the bundle bone invaded by the miniscrew threads. Narrowing of the periodontal ligament space was observed in cases where the miniscrew threads touched the bundle bone. BIC (%) was significantly lower in the high root proximity group than in the low root proximity and safe distance groups. However, BIC (%) showed no... -
THE INFLUENCE OF STABILIZATION SPLINT ON CONDYLAR POSITION AND CRANIOFACIAL MORPHOLOGY
Young Jooh Yoon, Kwang Won Kim 대한치과교정학회 The Korean Journal of Orthodontics 14 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1995, 제 25권 제 6호 3 675-688 (14 pages)
The purposes of this study were: 1) to determine the? normal range of CR-CO discrepancy in normal occlusion group: 2) to evaluate the changes of condylar position and craniofacial morphology between centric relation and centric occlusion before and after stabilization splint therapy in malocclusion group outside the normal range of CR-CO discrepancy. The normal occlusion group consisted of 80 subjects who had well-balanced faces and good occlusions with acceptable Class I molar relationship.... -
청소년 석고 모형 분석에 의한 하악절치 형태와 치아밀집의 상관관계에 관한 연구
서정은(Jeong-Eun Surh), 백형선(Hyoung-Seon Balk) 대한치과교정학회 The Korean Journal of Orthodontics 12 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1995, 제 25권 제 5호 8 593-604 (12 pages)
하악 전치의 밀집은 가장 흔히 볼 수 있는 부정교합의 특징중의 하나이며 교정치료후의 안정성과 재발 측면에서도 중요 관심의 대상이다. 이를 유발시킬 수 있는 원인으로 그동안 많은 요소가 연구되어 왔으며 치아의 크기도 그 중의 하나이다. 현재 교정치료의 진단과 치료에 사용되고 있는 치아 크기 측정에서는 순설측 폭경의 의미가 간과되어 왔는데 Peck과 Peck이 이상적인 하악 전치부 배열을 가진 경우 절치의 근원심 폭경은 평균보다 작고 순설측 폭경은 평균보다 크다는 통계학적 수치를 발표하고 MD/FL index가 하악 전치부... -
Report on a case treated with lingual multibracket appliance
Hee-Moon Kyung 대한치과교정학회 The Korean Journal of Orthodontics 11 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1996, 제 26권 제 6호 6 705-715 (11 pages)
The lingual multibracket appliance was developed to overcome the unesthetic nature of traditional fixed orthodontic labial appliances; however, treatment with this appliance was regarded as very difficult as well as a time-consuming. Recently, these problems have been reduced because of advances in lingual bracket systems, improved indirect bonding technique and the development of more flexible wires. There has been a marked increase in the number of adults desiring orthodontic treatment over... -
The effects of posterior retraction on the displacement of the maxilla
Bo-Yeong Yoo, Jong-Chul Kim 대한치과교정학회 The Korean Journal of Orthodontics 13 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1996, 제 26권 제 6호 5 691-703 (13 pages)
Three-dimensional finite element model was made from adult skull to find desirable direction of retraction force to treat skeletal class II malocclusion. The retraction force of 400g was applied to the first molar. The direction of the force application was 23° downward, parallel, 23° upward and 45` upward to the occlusal plane. The stress distribution and the displacement within the maxilla were analyzed by three-dimensional finite element method. The findings obtained were as follows: 1.... -
A comparative study of the angles between crown axis and root axis in mesiodistal direction by using orthopantomogram
Young-Joon Kim, Hyun-Sil Choi 대한치과교정학회 The Korean Journal of Orthodontics 10 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1996, 제 26권 제 6호 2 657-666 (10 pages)
was a large angle between crown axis and root axis, and if we valued only the position of crown in establishing occlusal relationship without considering of the situation of root, the problem of root arrangement between adjacent teeth would be occurred. The estimate of root parallelism in mesiodistal direction before and after orthodontic treatment must be emphasized. The intent of this study was to determine the clinical importance and correlation of the angle between crown axis and root axis.... -
교정용 호선의 세포독성에 관한 실험적 연구
임용규(Yong-Kyu Lim), 양원식(Won-Sik Yang) 대한치과교정학회 The Korean Journal of Orthodontics 9 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1996, 제 26권 제 5호 11 591-599 (9 pages)
본 연구는 널리 이용되고 있는 두 종류의 교정용 호선에 다양한 처리를 가한 후 호선의 세포독성을 비교, 평가하고자 시행하였다. 018x025inch 굵기의 stainless steel 호선과 Co-Cr 호선을 실험 재료로 선택하여 stainless steel 호선을 A 호선, Co-Cr 호선을 B 호선이라 칭하였으며 각각의 호선을 다시 가해진 처리에 따라 4군으로 나누었다. A-1군과 B-1군은 제작된 상태 그대로의 호선을 이용하였으며 A-2, B-2근은 기기를 이용하여 850°F에서 4분간 열처리 하였다. A-3, B-3군은 같은 방법으로 열처리한 후 표면의 불순물을... -
Continuous straight archwire에 의하여 발생하는 force system의 분석
최광철(Kwang-Chul Choy), 손병화(Byung Hwa Sohn) 대한치과교정학회 The Korean Journal of Orthodontics 10 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1996, 제 26권 제 3호 6 281-290 (10 pages)
Edgewise bracket에 continuous straight archwire를 장착 했을 때 각 bracket에 발생하는 force system은 statically indeterminate system이기 때문에 임상적으로 측정이 어렵다. 이에 본 연구는 linear beam theory를 도입하여 full arch에 straight wire가 장착된 경우 geometry(a/b), 재질, 단면의 모양, interbracket distance에 관계없이 발생 가능한 모든 상태를 설명할 수 있는 식을 유도하고 일례의 분석을 통하여 다음과 같은 결과를 얻었다. 1. Bilateral fixed beam의 양끝에서 발생하는 force system을 알 수 있는 계산식을... -
교정치료에 따른 미맹출 하악 제3대구치의 위치 변화에 관한 연구
이경원(Kyoung-Won Lee), 배성렬(Seong-Ryol Bae), 김상철(Sang-Cheol Kim) 대한치과교정학회 The Korean Journal of Orthodontics 7 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1996, 제 26권 제 1호 9 105-111 (7 pages)
임상교정에서의 원활한 치아배열을 도모하기 위하여 진단과 치료계획의 수립 제1소구치 혹은 제2소구치 발치 또는 제2대구치 발치 또는 비발치로 치료가 진행된다. 이때 나타나는 하악제3대구치의 위치적 변화 특히 근원심, 협설측 경사도의 변화도를 알아보고자 163명의 교정환자(비발치군 77례, 제1소구치 발거군 78례, 제2대구치 발거군 8례)의 치료전후 Pantomogram상을 분석하였다. 결과적으로 하악 제2대구치 발거순에서 치료전후 근원심 경사도의 변화가 컸으며, 하악 제3대구치의 초기 근심 경사도는 치료 전후의 근심경사도와... -
과개교합자의 저작근 활성도 및 교합력에 관한 연구
정동기(Dong-Ki Jeong), 김광원(Kwang-Won Kim) 대한치과교정학회 The Korean Journal of Orthodontics 10 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1996, 제 26권 제 1호 8 95-104 (10 pages)
본 연구의 목적은 T-Scan system과 근전도를 이용하여 정상교합자와 과개교합자의 최대교합력과 근활성도간의 상관관계를 조사하기 위함이다. 연구대상은 두 집단으로 구성되었다. 한 집단은 20명의 정상교합자이고 다른 집단은 30명의 과개교합자이다. 과개교합자는 Class I deepbite(9명의 남자와 7명의 여자)와 Class II div. 1 deepbite(8명의 남자와 6명의 여자)로 구성되었다. 이 연구로부터 얻어진 결과는 다음과 같다. 1. 최대교합력은 정상교합군에서 155.93N, I급 과개교합군에서 165.11 N, II급 1류 과개교합군에서... -
상,하악 제1소구치 발치 후 하악치열의 생리적 치아이동에 관한 연구
전윤식(Youn-Sic Chun) 대한치과교정학회 The Korean Journal of Orthodontics 9 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1996, 제 26권 제 1호 3 33-41 (9 pages)
소구치 발치 직후 일정기간 동안 고정식 장치를 이용한 치료를 의도적으로 연기함으로써 의외의 좋은 결과를 얻었다.는 연구결과가 발표되었고 이러한 연구결과를 입증하는 임상경험을 교정의들도 가끔 하게 된다. 소구치 발치 후 하악치열의 생리적 치아이동현상을 연구한 논문에 의하면 이를 생리적 치아이동(driftodontics)이라 명명하였다. Driftodontics의 개념이 교정학 영역에서 조심스럽게 소개되고 있는 이유는 driftodontic의 성질과 이동되는 양에 대해서는 아직 조사가 미흡한 실정이며 이러한 치아이동을 이용하기 위한... -
악교정 수술 후 골격성 Ⅲ급 부정교합 환자의 하악운동 변화에 관한 연구
남동석(Dong-Seok Nahm), 서정훈(Cheong-Hoon Suhr), 양원식(Won-Sik Yang), 장영일(Young-Il Chang) 대한치과교정학회 The Korean Journal of Orthodontics 10 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1997, 제 27권 제 2호 9 273-282 (10 pages)
본 연구는 골격성 III급 부정교합 환자에서 악교정 수술 전후의 하악운동 양상을 관찰하여 수술에 의한 하악운동의 변화를 평가하기 위하여 시행되었다. 서울대학교병원 교정과에서 골격성 III급 부정교합으로 진단받고 수술 전 교정치료를 받은 후, 동 병원 악안면구강외가에서 악교정 수술을 시행한 20명(남:9명, 여:11명)을 대상으로 수술 직전과 수술 2-7개월 후에 Sirognathograph와 Biopak EGN을 이용하여 최대 개폐구 운동과 시상면, 전두면, 수평면에서의 하악한계운동을 기록하고 21개의 항목을 계측하여 다음과 같은 결과를... -
전치부 반대교합 성인의 저작양상에 관한 연구
손병화(Byung-Wha Sohn), 유형석(Hyung-Seog Yu), 박종진(Jong-Jin Park) 대한치과교정학회 The Korean Journal of Orthodontics 10 Pages
대한치과교정학회 The Korean Journal of Orthodontics 1997, 제 27권 제 1호 3 35-44 (10 pages)
저작은 기본적으로 Brain system의 central pattern generator(CPG)에 의해 조절되면, CPG로 부터 target 기관까지의 출력(output)은 oral sensory seedback에 의해 변형된다. 전치부 반대교합은 이 feedback mechanism에 영향을 미치어 muscle activity와 jaw movement를 바꾼다. 본 연구는 정상교합자와 전치부 반대교합자의 muscle activity와 jaw movement pattern의 차이를 알고자 시행하였다. 대상은 각각 성인 남녀 30명씩으로 하였으며 측정은 Biopak system의 EMG와 EGN을 사용하여 얻은 결과는 다음과 같다. 1. Resting시... -
Camouflage Extraction Treatment of Unilateral Cleft Lip and Palate Patient: 4-year Follow-up
Woowon Jang, Jueon Song, Soonshin Hwang, Chooryung J. Chung, Kyung-Ho Kim 대한구순구개열학회 대한구순구개열학회지 7 Pages
대한구순구개열학회 대한구순구개열학회지 2019, 제 22권 1호 6 33-39 (7 pages)
Cleft lip and palate is one of the most common congenital abnormalities in the dentofacial region. Orthodontic treatment for adult patients with cleft lip and palate is difficult because of several factors such as dental anomalies, limitations in tooth movement around the cleft region, and retention. Here we report a case involving a 20-year-old woman with unilateral cleft lip and palate who successfully underwent camouflage orthodontic treatment for skeletal Class II malocclusion accompanied by... -
Spinal Metabotropic Glutamate Receptors (mGluRs) are Involved in the Melittin-induced Nociception in Rats
ChulHyunCho, HongKeeShin 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.5 4 237-244 (8 pages)
Intraplantar injection of melittin has been known to induce sustained decrease of mechanical threshold and increase of spontaneous flinchings. The present study was undertaken to investigate how the melittin-induced nociceptive responses were modulated by changes of metabotropic glutamate receptor (mGluR) activity. Changes in paw withdrawal threshold (PWT), number of flinchings and paw thickness were measured at a given time point after injection of melittin (10Ռg/paw) into the mid-plantar... -
Responses of Inferior Olive Neurons to Stimulation of Semicircular Canals. II. Vertical Semicircular Canalss
Sah-HoonPark, JongSeongPark, JinSoonPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.4 1 193-198 (6 pages)
In the present study, the vestibularly evoked activity of inferior olive (IO) neurons was examined to investigate the vertical vestibular information transmitted through the vestibulo-olivo-cerebellar climbing fiber pathway. The extracellular recording was made in 74 neurons of the IO of cats, while animals were sinusoidally rotated. Most of vestibularly activated IO neurons responded to the vertical rotation (roll) test and were found in or near the β subnuclei (IOβ). The vestibular IO...
