9 results on '"Chin Youb Chung"'
Search Results
2. Temporal pattern in segmental motions of the foot in healthy senile adults: comparison between young and senile healthy adults
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Sang Gyo Seo, Dong Yeon Lee, Ji‐Beom Kim, Seong Hyun Kim, Hye Sun Park, Hyo Jeong Yoo, Sung Ju Kim, Jihyeung Kim, Kyoung Min Lee, Chin Youb Chung, and In Ho Choi
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Public Health ,Young Adult ,Temporal Pattern ,Healthy Adult ,Segmental Motion ,Diseases of the musculoskeletal system ,RC925-935 - Published
- 2014
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3. Gender differences in segmental foot motions during gait using 3D multi‐segment foot model
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Sang Gyo Seo, Dong Yeon Lee, Ji‐Beom Kim, Seong Hyun Kim, Hye Sun Park, Hyo Jeong Yoo, Sung Ju Kim, Jihyeung Kim, Kyoung Min Lee, Chin Youb Chung, and In Ho Choi
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Gender Difference ,Reference Data ,Healthy Adult ,Segmental Motion ,Arch Data ,Diseases of the musculoskeletal system ,RC925-935 - Published
- 2014
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4. Repeatability of a multi‐segment foot model with a 15‐marker set in healthy adults
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Sang Gyo Seo, Dong Yeon Lee, Hyuk Ju Moon, Sung Ju Kim, Jihyeung Kim, Kyoung Min Lee, Chin Youb Chung, and In Ho Choi
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Gait analysis ,Repeatability ,Multi‐segment foot model ,Foot 3D ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Abstract Background Several 3D multi‐segment foot models (MFMs) have been introduced for the in vivo analysis of dynamic foot kinematics. However, reproducibility of a model should be checked and ascertained before clinical utilization of a MFM. The purpose of this study was to determine the reliability of recently introduced MFM with a 15‐marker set by assessing the participant's stride‐to‐stride (intra‐session) and visit‐to‐revisit (inter‐session) repeatability. Methods Twenty healthy adults with a mean age of 28.9 years (10 males and 10 females) were tested. Three representative strides from five separate trials were used for analysis from each session. Kinematic data of foot segmental motion was collected and tracked using the Foot3D Multi‐Segment Software (Motion Analysis Co., Santa Rosa. CA). A retest was performed in the same manner at an interval of 4 weeks. Coefficients of multiple correlation (CMC) and intra‐class correlation coefficient (ICC) were calculated in order to assess the intra‐session and inter‐session repeatability. Results Inter‐segment foot angles from healthy adults from a MFM with 15‐marker set showed a narrow range of variability during the gait cycle. The mean intra‐session ICC was 0.981 (±0.010), which was interpreted as excellent. The mean intra‐session CMC was 0.948 (±0.027), which was interpreted as very good repeatability. The mean inter‐session ICC was 0.886 (±0.047) and the mean inter‐session CMC was 0.801 (±0.077), which were interpreted as excellent and good repeatability, respectively. Conclusion We demonstrated a MFM with a 15‐marker set had high intra‐session and inter‐session repeatability, especially in sagittal plane motion. We thought this MFM would be applicable to evaluation of the segmental foot motion during gait.
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- 2014
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5. Functional status and amount of hip displacement independently affect acetabular dysplasia in cerebral palsy
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Myung Ki Chung, Jaebong Lee, Byung Chae Cho, Moon Seok Park, Arif Zulkarnain, Chin Youb Chung, Kyoung Min Lee, and Ki Hyuk Sung
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Male ,musculoskeletal diseases ,medicine.medical_specialty ,Adolescent ,Consensus Development Conferences as Topic ,Severity of Illness Index ,Cerebral palsy ,Tertiary Care Centers ,Young Adult ,03 medical and health sciences ,Imaging, Three-Dimensional ,0302 clinical medicine ,Developmental Neuroscience ,Severity of illness ,Hip Dislocation ,Humans ,Medicine ,Displacement (orthopedic surgery) ,Young adult ,Child ,Hip Dislocation, Congenital ,Retrospective Studies ,Orthodontics ,030222 orthopedics ,business.industry ,Cerebral Palsy ,Reproducibility of Results ,Acetabulum ,Gross Motor Function Classification System ,Retrospective cohort study ,medicine.disease ,Acetabular dysplasia ,Surgery ,Child, Preschool ,Pediatrics, Perinatology and Child Health ,Linear Models ,Female ,Neurology (clinical) ,Tomography, X-Ray Computed ,business ,030217 neurology & neurosurgery - Abstract
Aim Acetabular dysplasia is the one of main causes of hip displacement in patients with cerebral palsy (CP). Although several studies have shown a relationship between hip displacement and acetabular dysplasia, relatively few have evaluated the association between quantitative acetabular dysplasia and related factors, such as Gross Motor Function Classification System (GMFCS) level. Method We performed a morphometric analysis of the acetabulum in patients with CP using multiplanar reformation of computed tomography data. The three directional acetabular indices (anterosuperior, superolateral, and posterosuperior) were used to evaluate acetabular dysplasia. Consequently, linear mixed-effects models were used to adjust for related factors such as age, sex, GMFCS level, and migration percentage. Results A total of 176 patients (mean age 9y 5mo, range 2y 4mo–19y 6mo; 104 males, 72 females) with CP and 55 typically developing individuals (mean age 13y 6mo, range 2y 5mo–19y 10mo; 37 males, 18 females) in a comparison group were enrolled in this study. Statistical modelling showed that all three directional acetabular indices independently increased with GMFCS level (p
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- 2017
6. Is double inactivation of the Nf1 gene responsible for the development of congenital pseudarthrosis of the tibia associated with NF1?
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Hye Ran Lee, Tae Joon Cho, Dong Yeon Lee, In Ho Choi, Woon Joon Yoo, Moon Seok Park, Chin Youb Chung, and Sang Min Lee
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congenital, hereditary, and neonatal diseases and abnormalities ,Pathology ,medicine.medical_specialty ,Cell ,Biology ,medicine.disease ,Loss of heterozygosity ,medicine.anatomical_structure ,Genetic marker ,Congenital pseudarthrosis ,medicine ,Fibrous hamartoma ,Orthopedics and Sports Medicine ,Tibia ,Neurofibromatosis ,neoplasms ,Gene - Abstract
The pathogenic mechanism responsible for congenital pseudarthrosis of the tibia (CPT) is not well understood although the possibility of double inactivation of the neurofibromatosis type 1 (Nf1) gene has been suggested. In the present study, loss of heterozygosity was investigated in fibrous hamartoma tissues harvested from 16 patients with CPT associated with NF1 using four genetic markers that span the Nf1 gene. Based on the assumption that a single cell with double inactivation of Nf1 would undergo clonal growth and cause fibrous hamartoma, we investigated clonality in fibrous hamartoma tissues by analyzing X-chromosome inactivation patterns in 11 female patients. Loss of Nf1 heterozygosity in fibrous hamartoma tissues was observed at one or two genetic markers in 4 out of the 16 patients tested. In clonality assays, 3 of 11 patients showed a clonal growth pattern, 5 a non-clonal pattern, and 3 were non-informative. These findings support that double inactivation of the Nf1 gene and subsequent clonal growth could be a pathogenic feature of the fibrous hamartoma tissue at least in some of the CPT but might not be essential requirements of CPT development. © 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 30:1535–1540, 2012
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- 2012
7. Prophylactic femoral varization osteotomy for contralateral stable hips in non-ambulant individuals with cerebral palsy undergoing hip surgery: decision analysis
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Chin Youb Chung, Dae Gyu Kwon, Kyoung Min Lee, In Ho Choi, Ki Hyuk Sung, and Moon Seok Park
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musculoskeletal diseases ,Subluxation ,Hip surgery ,medicine.medical_specialty ,Reconstructive surgery ,business.industry ,medicine.medical_treatment ,Gross Motor Function Classification System ,medicine.disease ,Osteotomy ,Prophylactic Surgery ,Surgery ,Cerebral palsy ,Developmental Neuroscience ,Anesthesia ,parasitic diseases ,Pediatrics, Perinatology and Child Health ,medicine ,Neurology (clinical) ,business ,Complication - Abstract
Aim This study was undertaken to determine the need for concurrent prophylactic femoral varization osteotomy (FVO) of contralateral stable hips at the time of hip reconstructive surgery on unstable hips in non-ambulant individuals with cerebral palsy (Gross Motor Function Classification System levels IV and V). Method A decision analysis model was constructed that included (1) the probability of unstable hips during observation of the contralateral stable hips, (2) unstable hip rate (subluxation or dislocation rate) after prophylactic FVO or after delayed reconstructive surgery (including FVO) for unstable hips, and (3) complication rates after concurrent prophylactic FVO or after hip reconstructive surgery. The final outcome score was based on pain utility measures. The probabilities of all cases and the utility score were obtained by literature review. Results The decision model favoured concurrent prophylactic FVO for the contralateral stable hips over observation (pain utility measure scores 0.814 vs 0.781). In a one-way sensitivity analysis, the decision model favoured concurrent prophylactic FVO when the unstable hip rate of contralateral stable hips during observation was 27% or over. Concurrent prophylactic surgery also demonstrated higher utility scores than observation when the unstable hip rate after FVO was between 0% and 29%. Interpretation The decision analysis model demonstrated that concurrent prophylactic FVO for a contralateral stable hip in individuals with cerebral palsy undergoing hip reconstructive surgery was beneficial from a medical perspective, which was based on current evidence.
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- 2012
8. Vascular proliferation and blood supply during distraction osteogenesis: A scanning electron microscopic observation
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Jae Hoon Ahn, Tae Joon Cho, In Ho Choi, and Chin Youb Chung
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Male ,Bone Regeneration ,Mature Bone ,Medullary cavity ,medicine.medical_treatment ,Osteogenesis, Distraction ,Neovascularization, Physiologic ,Corrosion Casting ,Osteotomy ,Bone tissue ,Rats, Sprague-Dawley ,Periosteum ,Animals ,Medicine ,Orthopedics and Sports Medicine ,Tibia ,Bone regeneration ,business.industry ,Anatomy ,Rats ,medicine.anatomical_structure ,Models, Animal ,Microscopy, Electron, Scanning ,Blood Vessels ,Distraction osteogenesis ,business ,Cell Division - Abstract
This scanning electron microscopic study examined the spatial and temporal features of proliferating vessels of regenerating bone tissue and blood supply during distraction osteogenesis. A rat model of tibial lengthening was used with a protocol divided into a latency period of 7 days, a distraction period that lasted 14 days with a daily distraction rate of 0.5 mm in two steps, and a consolidation period of 21 days. Vascular casting was done on the hindlimbs before osteotomy and on postoperative days 7, 14, 21, 28, and 42. Scanning electron microscopic findings were correlated with radiological and histological observations. On days 7 and 14, the proliferation of periosteal vessels was pronounced and there was distinct subperiosteal bone formation on the osteotomized surfaces. On day 21, vascular branches from the medullary canal of the host bone formed a vascular network, which gave rise to multiple axial, straight vascular branches, running parallel to the direction of distraction, toward the interzone, in accordance with the progress of mineralization. On day 28, the periosteum provided vascularization to the peripheral side of the interzone whereas the center of the interzone was still relatively avascular. On day 42, the periosteal and medullary vascular channels were completely connected at the distraction site including the interzone, which was occupied by developing and mature bone trabeculae. These results suggest that vascular proliferation occurs actively during the latency and distraction periods and then gradually decreases over time. A close temporal and spatial relationship exists between formation of regenerated bone and vascular proliferation of the periosteum and medullary canal.
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- 2000
9. The histological spectrum of subperiosteal fibrocartilaginous pseudotumor of long bone (focal fibrocartilaginous dysplasia)
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In Ho Choi, Chong Jai Kim, Chin Youb Chung, Je G. Chi, and Tae Joon Cho
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Male ,Dense connective tissue ,Pathology ,medicine.medical_specialty ,Long bone ,Osteochondrodysplasias ,Pathology and Forensic Medicine ,Immunoenzyme Techniques ,Periosteum ,medicine ,Humans ,Femur ,Tibia ,Hyaline ,business.industry ,S100 Proteins ,Infant ,General Medicine ,Anatomy ,medicine.disease ,Radiography ,medicine.anatomical_structure ,Dysplasia ,Fibrocartilage ,Female ,Cortical bone ,business - Abstract
Clinicopathological features in six cases of focal fibrocartilaginous dysplasia (FFCD) which involved either the tibia (n = 4) or the femur (n = 2) were reviewed. All cases presented clinical and radiological characteristic features, and histopathological findings were analyzed in five of the six cases. The subject group comprised three boys and three girls, ages ranged from 12 to 18 months. Histologically, the individual lesions showed regional variation in cellularity, amount of fibrous and cartilaginous components. Paucicellular areas were mainly composed of dense fibrous tissue while more cellular areas contained foci of fibrocartilaginous element. The chondrocytes and stellate cells around cartilaginous area were positive for S-100 protein. One case contained both hyaline and fibrocartilage, and architecturally mimicked normal tendinous insertion. One case, which involved proximal tibia, was purely composed of fibrous tissue without fibrocartilage. All cases formed undulating and irregular borders against underlying cortical bone. Histopathologically variable spectrum suggests a strong possibility of undergoing transition from initial cellular and cartilagnous to late paucicellular, fibrous phase. Although any evidence that can explain basic pathogenesis or prognostic histological parameter is lacking, we believe that the term FFCD is not relevant because the presence of fibrocartilage is not an essential feature, and it can cause confusion with other pathological processes. We propose the term 'subperiosteal fibrocartilaginous pseudotumor of long bone' for this unique clinicopathological entity with which heterologous cartilaginous element can be associated.
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- 1999
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