1.Augmented Reality in Medicine.
Hanyang Medical Reviews 2016;36(4):242-247
Augmented reality is popular in various fields, and the importance of this technology has been increasing. Its medical application has also been widely studied. Particularly, augmented reality can be a more promising technique of a surgery which requires great precision. This paper introduces an overview of augmented reality and reviews the recent applications in medicine. After describing the basic concepts, brief characteristics of the three components that comprise augmented reality are provided. Various applications implemented in the authors' laboratory are reviewed.
2.Augmented Reality in Medicine.
Hanyang Medical Reviews 2016;36(4):242-247
Augmented reality is popular in various fields, and the importance of this technology has been increasing. Its medical application has also been widely studied. Particularly, augmented reality can be a more promising technique of a surgery which requires great precision. This paper introduces an overview of augmented reality and reviews the recent applications in medicine. After describing the basic concepts, brief characteristics of the three components that comprise augmented reality are provided. Various applications implemented in the authors' laboratory are reviewed.
3.Aortic rupture.
Chul Ha CHUNG ; Chung Gun SONG ; Bon Il KU ; Shin Young LEE ; Sang Jun OH ; Hong Sup LEE ; Chang Ho KIM
The Korean Journal of Thoracic and Cardiovascular Surgery 1993;26(11):838-844
No abstract available.
Aortic Rupture*
4.Horizontal Ratio of the Korean University Student's Face and Facial Golden Mask.
Jun Ho LEE ; Gun Wook PARK ; Yong Ha KIM
Journal of the Korean Society of Plastic and Reconstructive Surgeons 2008;35(5):514-520
PURPOSE: Many attempts have been made to describe ideal facial proportions for over two thousands year and constantly lasted till now. Dr. Marquardt has derived supposedly ideal facial proportions from the facial golden mask using golden ratio of 1:1.618. On the other hand, facial reducing surgeries such as mandible angle reduction are popularized in Asia because the width of mid and lower face of Korean is recognized to be wider. The purpose is to analyze characters of Korean university students' faces in horizontal plane and establish the objective data for facial width distributions and clinical applications. METHODS: We applied the facial golden mask to the photographs in 1000 cases, compared the width of mid and lower face between the facial golden mask and Korean university students' faces. And we first calculated the horizontal ratio(HR) of middle and lower face each for using comparative scale of width, facial golden mask. We divided 1,000 cases into 3 groups by degrees of HR and analyzed data of HR on each groups. Using calculated horizontal ratio, we newly invented the cumulative frequency of distribution graphs in Korean university students' faces. RESULTS: Mean data of HR were over 1.0 in all groups, which means that Korean university students' faces are typically wider than facial golden mask in horizontal planes. And this study was statistically significant(p- value<0.05). Clinically using the cumulative frequency distributions of Korean university students' face width, we can easily explain changes of facial width to patient after facial reducing surgery and describe the changes into objective data. CONCLUSION: This study concludes thatKorean university students' faces are wider than facial golden mask is significantly true and the cumulative frequency of distribution graphs are expected to be widely used for comparison of results in facial reducing surgery.
Asia
;
Hand
;
Humans
;
Mandible
;
Masks
5.Vitamin D Levels in Children and Adolescents with Antiepileptic Drug Treatment.
Jung Hyun BAEK ; Young Ho SEO ; Gun Ha KIM ; Mi Kyung KIM ; Baik Lin EUN
Yonsei Medical Journal 2014;55(2):417-421
PURPOSE: This study was to evaluate the relationship of 25(OH)D3 levels with anticonvulsant use and other possible factors in epileptic children and adolescents. MATERIALS AND METHODS: We studied 143 patients with epilepsy (90 boys, 53 girls; 11.21+/-4.49 years), who had been treated with anticonvulsants for more than 1 year. Patients who had taken multiple vitamins before the blood test and those who have the limitation of physical activity (wheelchair-bound) were excluded from the study. We evaluated the difference in vitamin D status according to the type and number of anticonvulsants taken and other factors such as gender, age, intelligence and seizure variables. RESULTS: For patients with mental retardation or developmental delay, 25(OH)D3 levels were lower than the levels in patients with normal intelligence quotient levels (p=0.03). 25(OH)D3 levels were lower in patients who had taken anticonvulsants for more than 2 years as compared to those who had taken them for less than 2 years (p=0.03). Those taking oxcarbazepine had significantly lower vitamin D levels than patients taking valproic acid (p=0.01). However, no effects of number of anticonvulsants taken were detectable. More than two-thirds of the patients were diagnosed with osteopenia or osteoporosis in patients showing either vitamin D insufficiency or deficiency. CONCLUSION: The possibility of vitamin D deficiency can be considered in pediatric patients taking anticonvulsants if they have mental retardation or developmental delay or if they have been taking anticonvulsants for more than 2 years or taking hepatic enzyme inducing drugs.
Adolescent*
;
Anticonvulsants
;
Bone Diseases, Metabolic
;
Child*
;
Developmental Disabilities
;
Epilepsy
;
Female
;
Hematologic Tests
;
Humans
;
Intellectual Disability
;
Intelligence
;
Methods
;
Motor Activity
;
Osteoporosis
;
Seizures
;
Valproic Acid
;
Vitamin D Deficiency
;
Vitamin D*
;
Vitamins*
6.The Influence of Fibronectin and/or RGDS Tetrapeptide on Osteopontin Expression in Cultures of Rat Calvarial Osteoblasts.
Suk Ku HAN ; Hyoung Min KIM ; Nam Yong CHOI ; Ho Gun KIM ; Jae Do HA
The Journal of the Korean Orthopaedic Association 2002;37(1):145-151
PURPOSE: To investigate the effect of fibronectin (FN) and/or RGDS tetrapeptide on osteoblastic proliferation and osteopontin expression. MATERIALS AND METHODS: Osteoblasts were cultured on tissue culture polystyrene (TCPS) and apatite-wallastonite glass ceramics (AW-GC) with or without FN and RGDS synthetic tetrapeptide. Osteoblastic proliferation and differentiation were measured after cultivation, by determining the number of attached cells, by [3H]-thymidine assay, and by measuring the activity of alkaline phosphatase. The expression of osteopontin (OPN) was determined by RT-PCR and western blotting. RESULTS: Cellular proliferation was more increased by FN than the other variables examined (P<0.03). OPN mRNA expression by RT-PCR was induced two-fold, 24-hour after FN treatment (P<0.05). The expression of OPN by western blotting showed a five-fold increase in cells treated with FN compared with the controls. The synthetic RGDS peptides partially blocked the growth of cells induced by FN (P<0.05). RGDS tetrapeptide alone increased the OPN expression induced by cultured osteoblasts (P<0.05). CONCLUSION: FN enhanced osteoblastic proliferation on glass ceramics and induced OPN expression. Integrin occupancy by RGD-containing molecules may play a role in the process of osteoblastic proliferation rather than in osteoblastic differentiation.
Alkaline Phosphatase
;
Animals
;
Blotting, Western
;
Cell Proliferation
;
Ceramics
;
Fibronectins*
;
Glass
;
Osteoblasts*
;
Osteopontin*
;
Peptides
;
Polystyrenes
;
Rats*
;
RNA, Messenger
9.Increased copper content in hair mineral assay of anorexia nervosa patients: 3 cases.
Jae Eun HA ; Gun Young CHUN ; Su Yean KIM ; Ha Kyun JANG ; Ho Jung PARK ; Hyun Hee CHO
Korean Journal of Obstetrics and Gynecology 2008;51(11):1373-1378
Anorexia nervosa is a kind of dietary disorder which causes amenorhea, weight loss, behavioral changes, and its hormonal status is typical hypogonadotrophic hypogonadism. The patients with anorexia nervosa showed many hormonal and chemical abonormal findings, like decresed follicular stimulating hormone, decreased lutealizing hormone and estrogen, increased cortisol, hypokalemia, hypercarotenemia. But tissue mineral contents of anorexia nervosa were not reported. We experience the typical increase of tissue copper contents in three anorexia nervosa patients in recent days, so report them with reviews of literatures.
Anorexia
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Anorexia Nervosa
;
Copper
;
Estrogens
;
Hair
;
Humans
;
Hydrocortisone
;
Hypogonadism
;
Hypokalemia
;
Weight Loss
10.Consideration for treatment of bisphosphonate-related osteonecrosis of the jaw.
Kyung Ha YOU ; Kyu Ho YOON ; Jung Ho BAE ; Jae An PARK ; Gun Chan PARK ; Jae Myung SHIN ; Jee Seon BAIK ; Jeong Kwon CHEONG
Journal of the Korean Association of Oral and Maxillofacial Surgeons 2010;36(3):206-210
Bisphosphonates are widely used to treat osteoporosis, hypercalcemia of malignant tumor. Despite their clinical benefit, bisphosphonate-related osteonecrosis of the jaw (BRONJ) is a newly documented complication to patients receiving these drugs and first recognized by Marx in 2003. Thus, consideration of prevention and needs regarding unequivocal treatment regimen have emerged. Recently, several authors emphasized reports on appropriate clinical availability of surgical approach. It serves to concern about guideline for surgical and conservative treatment modalities. So, it is the purpose of this paper to review the current literatures about treatment regimens of BRONJ.
Bisphosphonate-Associated Osteonecrosis of the Jaw
;
Diphosphonates
;
Humans
;
Hypercalcemia
;
Osteonecrosis
;
Osteoporosis