• Journal of Chest Surgery
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• v.38 no.12 s.257
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• pp.852-855
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• 2005

A 85-day-old infant was successfully operated on for truncus arteriosus (type I) with interrupted aortic arch (type A) using one-stage anterior approach without circulatory arrest. Aortic arch was reconstructed by direct anastomosis of ascending aorta and descending aorta with regional perfusion and continuity of right ventricle to pulmonary artery was established with $Shelhigh^{circledR}$ pulmonic conduit. The patient experienced left bronchus compression by descending aorta immediately postoperatively, which was improved with positional change and physiotherapy. The patient had reoperation due to stenosis of valved conduit at 13 months later. The patient is currently well under follow-up of 14 months from initial repair.

• Journal of the korean academy of Pediatric Dentistry
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• v.44 no.4
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• pp.412-418
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• 2017

During orthodontic treatment, formation of white spot lesions (WSLs) around brackets has long been recognized as a potential risk. This study performed to investigate effect of preventing enamel demineralization and remineralization by application of fluoride-containing orthodontic primer. Fifty extracted bovine incisors teeth were randomly allocated to 3 groups: (I) Non-preparation specimens, (II) Application of Light Bond$^{TM}$ as fluoride containing orthodontic primer, (III) Application of Transbond$^{TM}$ XT Primer as traditional orthodontic primer without fluoride. Each group is demineralized under artificial carious solution. The demineralization pattern was evaluated using a Q-ray view, Vickers hardness test and polarized light microscope. The remained primer was calculated as 35 - 50%. The highest surface microhardness was shown on Light Bond$^{TM}$ surface. There were statistically significant differences in Vickers microhardness number between adjacent areas of Light Bond$^{TM}$ and non-prepared area. There was almost no demineralization of the enamel surface under the Light Bond$^{TM}$. At the adjacent site of Light Bond$^{TM}$, the shallow caries pattern and remineralization appearance were also observed. These results suggest that the use of fluoride-containing primers may be useful for bracket attachment to reduce enamel demineralization during orthodontic treatment.

• Journal of Korea Entertainment Industry Association
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• v.14 no.8
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• pp.245-253
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• 2020

This study has conducted to investigate the changes in the mobility of the three thoraco-abdominal lines(TAMs) during breathing and in the thoracic and lumbar spine mobility(TSM, LSM) during trunk forward flexion, after breathing pattern correction. The 30 subjects with lumbar instability(LI) have divided into the breathing pattern correction exercise(BPC) group of 15 subjects and the lumbar stabilization exercise(LSE) group of 15 subjects and performed each exercise for 40 minutes at one session, and a total of 18 sessions were applied for 6 weeks. As a result, The BPC group during breathing showed a significant increase in all TAMs(p<.001) and in the TSM(p<.001) than the LSE group. Besides, had a more decrease in the LSM than the LSE group(p<.001). The BPC showed high positive correlations with TAMs(rest: r=.868, forced: r=.870) and the TSM(r=.672) and had a negative correlation with the LSM(r=-.420). Based on this result of the study, the authors believe that the BPC in LI people could decrease the lumbar flexion mobility when they have motion of trunk forward flexion with promotions in the thoracic spine and rib joint mobility by improvements in relative mobility of thoraco-abdominal lines.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.8 no.5
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• pp.359-366
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• 2015

TMJ(TemporoMandibular Joint) is considered as the most important articulation in human body for maintaining the balance. Thus it is one of the main treatment areas in Chiropractic. Instead of Chiropractic treatment, NOSICK, a TMJ balancing device, can be used. As there is no such device to quantify the effect of NOSICK, a system was developed to measure the effect of NOSICK. This system is composed of stereo vision, infrared lights, and infrared through filter, etc. It requires optical markers for the measurement. 8 land markers were selected from the face which will show different displacement as NOSICK is applied. 11 test subjects were measured with the system developed with and without NOSICK applied. Quantifiable displacement of markers before and after applying NOSICK was successfully measured with the system developed.

• The korean journal of orthodontics
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• v.26 no.3
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• pp.317-324
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• 1996

This study was conducted to evaluate the tensile bond strength of three commercially available glass ionomer cements as orthodontic bracket adhesives. 120 premolars extracted for orthodontic treatment were prepared for bonding and standard edgewise brackets were bonded with Shofu Glaslonomer Cement (Shofu Co., U.S.A.), GC Fuji ItGC Co., Japan), KETAC-CEM(ESPE Co., West Germany) with different P/L ratio. The tensile bond strength was tested by Instron testing device after 24hours and 3months from bonding. After debracketing, bracket bases were examined to determine the failure sites. The results of this study were as follows: 1. KETAC CEM showed the highest bond strength other than measurement after 24 hours and at its original P/L ratio, and seemed to have clinically a proper bond strength. It seemed, however, that both Shofu Giaslonomer Cement and GC Fuji I had an inappropriate bond strength. 2. The incorporation of additional powder into the mixture improved the tensile bond strength. 3. Prolonged storage time improved the tensile bond strength. 4. Of the failure, failure occured at the tooth-adhesive interface(54.2%) was the most common type. The second type of failure(36.7%) was combination type, where part of the adhesive remained on the tooth and part on the bracket. And the last type of failure(9.1%) occured at the adhesive-bracket interface.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2020.07a
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• pp.607-610
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• 2020

21세기 핵심 키워드 중 하나로 두뇌 산업이 떠오르고 있다. 미국, 일본 등 선진 국가에서는 이미 뇌 연구에 활발한 투자가 진행되고 있다. 이에 따라 본 논문에서는 출생과 성장기 뇌 발달에 문제가 발생하는 발달 장애 아동을 위한 음악 치료 프로그램을 개발하고자 한다. 효과적인 발달 장애 치료를 위해, 조기 발견 후 인지 학습 치료가 필요하다. 그 중 인지 기능과 자가 관리 기능을 기르는 것이 중요한데, 리듬 타이밍 훈련이 발달 장애 아동의 기억 능력 개선에 도움이 된다는 여러 입증된 연구 결과가 있다. 그러나 아직까지 발달 장애 아동을 위한 적절한 치료 방법이 없기에 본 논문에서는 인지 학습 치료가 필요한 아동에게 도움을 주기 위해 동요의 정확한 리듬, 음정을 학습하는 프로그램을 제안한다. 아동의 지속적인 흥미를 끌 수 있는 게임과 인지능력 훈련을 결합하였기에, 보다 좋은 학습 효과를 유도할 수 있을 것이다.

• The korean journal of orthodontics
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• v.28 no.1 s.66
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• pp.113-122
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• 1998

Stabilization splint therapy Precedes orthodontic intervention to enable the operator to find a 'true' centric(which is stable and comfortable), to test the patient's response to a change in the occlusion, prior to embarking upon a complex course of occlusal therapy : and finally, to see if the centric relation position can be stabilized. For this study, 47 malocclusion Patients enrolled for orthodontic treatment at the Department of Orthodontics, College of Dentistry, Chosun University comprised the malocclusion group, little variation of growth factor by the second molar eruption. They had Cr-Co discrepancy beyond normal range. For each patients the stabilization splint with mutually protected type of occlusal scheme was applied for 3 months. Condylar positions in CR and CO were measured using Penadent articulators, Panadent condylar position indicator(CPI), and transcranial projection before & after stabilization splint therapy. On the basis of this study, the results of this study were as follows 1. In all samples using CPI, there were statistical significances in CR-CO discrepancy(p<0.001) both before 8t after stabilization splint therapy. 2. In Rt and Lt+Rt/2 of superior joint space using transcranial projection, there were statistical significances in CR-CO discrepancy({<0.05) before & after stabilization splint therapy. 3. In supero-inferior components using CPI, there were statistical significances in CR-CO discrepancy(p<0.01) before & after stabilization splint therapy. 4. In all components except Rt using transcranial projection, there were no statistical significances in CR-CO discrepancy(p>0.05) before & after stabilization splint therapy. To sum up, CPI might be more effective than transcranial projection to reveal the changes between CR-CO discrepancies and stabilization splint might be more useful appliance for displaying the vertical changes, than the antero-posterior changes, of condylar position.

• Radiation Oncology Journal
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• v.23 no.3
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• pp.176-185
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• 2005

Purpose: Film dosimetry as a part of patient specific intensity modulated radiation therapy quality assurance (IMRT QA) was peformed to develop a new optimization method of film isocenter offset and to then suggest new quantitative criteria for film dosimetry. Materials and Methods: Film dosimetry was peformed on 14 IMRT patients with head and neck cancers. An optimization method for obtaining the local minimum was developed to adjust for the error in the film isocenter offset, which is the largest part of the systemic errors. Results: The adjust value of the film isocenter offset under optimization was 1 mm in 12 patients, while only two patients showed 2 mm translation. The means of absolute average dose difference before and after optimization were 2.36 and $1.56\%$, respectively, and the mean ratios over a $5\%$ tolerance were 9.67 and $2.88\%$. After optimization, the differences in the dose decreased dramatically. A low dose range cutoff (L-Cutoff) has been suggested for clinical application. New quantitative criteria of a ratio of over a $5\%$, but less than $10\%$ tolerance, and for an absolute average dose difference less than $3\%$ have been suggested for the verification of film dosimetry. Conclusion: The new optimization method was effective in adjusting for the film dosimetry error, and the newly quantitative criteria suggested in this research are believed to be sufficiently accurate and clinically useful.

• Journal of the korean academy of Pediatric Dentistry
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• v.35 no.2
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• pp.357-366
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• 2008

Posterior cross-bite is a relatively frequent malocclusion in primary and early mixed dentition and the reported prevalence of posterior cross-bite varies from 7% to 23%. It has been defined as a transverse discrepancy in arch relationship which the palatal cusp of the upper posterior teeth do not occlude in the central fossa of the opposing lower teeth, and can be manifested in a single tooth or in a group of teeth. Posterior cross-bite does not often self-correct and therefore immediate treatment is recommended. Occlusal adjustment to eliminate premature contact that causes mandibular deviation, expansion of narrow maxillary arch, arrangement of the individual teeth to treat asymmetry within the dental arch are the methods of treating cross-bite. In the present case, functional posterior cross-bite was observed in the primary and the early mixed dentition children. The children were treated by the slow maxillary expansion and occlusal adjustment. The outcome of periodic examinations after the correction of cross-bite was favorable.

• The korean journal of orthodontics
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• v.27 no.3 s.62
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• pp.473-479
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• 1997

This author tried to find if the size of the frontal sinus can be used as a diagnostic aid to predict the manldibular growth pattern in growing Patients in lateral cephalogram utilizing the fact the the frontal sinus completes its growth in earlier stage but the mandible continues to grow until later. At this study, the 228 samples were divided into 3 groups as skeletal Class I, II, III malocclusions and three indicies(ANB, APDI, Wits) were measured which indicate the mandibular body length and the antero-posterior relationship of maxilla and mandible to evaluate their relations with frontal sinus. And results were obtained as followings 1. The size of frontal sinus is highly related to ANB, APDI, Wits and mandilar body length.(p<0.001) 2. the size of the frontal sinus of the Cl III malocclusion group was on the lateral cephalogram larger than Cl I and Cl II group.