The purpose of this study was to verify the split-crest technique experimentally for successful implantation at alveolar bone having unfavorable condition. Using inferior border of the mandible of the canine, we made comparable study about the state of osseointegration between conventional technique and split-crest technique. We set experimental group which was implanted at inferior border of the mandible of the canine by split-crest technique using the fixture of 3.75 mm width and 8mm length, and set control group which was implanted by conventional technique at the counter area of the mandible. The experimental animal was sacrificed at 1, 4, 8 and 16 week. We observed the changing process of bone formation following implantation with stereoscopy, light microscopy, electron microscopy and fluorescent microscopy, and studied histomorphometrically. Histologic results were as follow : 1. In control group, a bit of new bone formation was initiated on a portion of bone defect area at 1 week. The initiation of osseointegration between fixture and new bone was seen at 4 week. New bone tissue with normal shape and structure formed and filled defect area at 8 week. But complete bone remodeling was attained at 16 week. 2. In experimental group, bone formation around fixture was going on actively. But the shape and structure of new bone area was more irregular than that of control group, and bone density was also lower than that of control group. Active new bone formation was still observed at 16 week. 3. The osseointegrated new bone was remodeled to cancellous bone having trabeculae and marrow space composed of compact lamellar bone. 4. In fluorescent microscopic analysis, active bone formation was seen between 4 weeks and 8 weeks at control group. Otherwise, along the all experimental period new bone formation was observed evenly at experimental group. 5. Both control and experimental group, normal osseointegration was accomplished without bone resorption which is essential factor in split-crest technique. As previous results, when implantation using split-crest technique at alveolar bone attenthaving unfavorable condition, early bone formation was delayed slightly, but we could get attentive results along the long term period.
Animals ; Bone and Bones ; Bone Density ; Bone Marrow ; Bone Remodeling ; Bone Resorption ; Mandible ; Microscopy ; Microscopy, Electron ; Osseointegration* ; Osteogenesis

No abstract available.
Knee Joint* ; Knee*

BACKGROUND: Adrenalectomy does impair the expression of hypothalamic NPY gene in the rat and replacement of glucocorticoid by intracerebroventricular(ICV) route resulted in a normalization of refeeding hyperphagia and weight gain in adrenalectomized(ADX), food-deprived rats. The purpose of this study was to assess the direct effect of CNS glucocorticoid on hypothalamic NPY gene expression which occurs following food deprivation in ADX rats. METHODS: Adult male Wistar rats were fitted with ICV cannulae and restricted the food intake for 14 days. Adrenalectomy and sham operation were done on the 10th day and single ICV corticosterone acetate(100ug/2uL) was given in one ADX group(ADX+CORT, n=9) and vehicle (2uL) was given in another ADX group(ADX+VEH, n=9) and sham rats(SHAM+VEH, n=7). After experiment, we measured NPY mRNA on arcuate nucleus by in situ hybridization. RESULTS: The rate of weight loss of ADX rats closely parallded that of sham-operated rats. Plasma glucose and insulin levels were not significantly different in three groups. Hybridization density on the ARC in ADX+VEH rats(0.42+/-0.02uCi/g: p<0.05) was significantly reduced compared to that in sham controls(0.68+/-0. 11uCi/g). ICV corticosterone injection increased the hybridization density in ADX+CORT rats(0.53+/-0.04uCi/g) compared to vehicle alone, although this did not reach that of controls. NPY gene expression was 40% in ADX+VEH rats and 62% in ADX+CORT rats compared to control rats. CONCLUSIONS: These results are consistent with the hypothesis that CNS glucocorticoid deficiency appears to be responsible for the impairment of refeeding hyperphagia in ADX rats and the effect of CNS glucocorticoid deficiency is a manifestation of impaired activation of hypothalamic NPY gene expression in the ARC.
Adrenalectomy ; Adult ; Animals ; Arcuate Nucleus ; Blood Glucose ; Catheters ; Corticosterone* ; Eating ; Food Deprivation ; Gene Expression ; Humans ; Hyperphagia ; In Situ Hybridization ; Insulin ; Male ; Rats* ; Rats, Wistar ; RNA, Messenger* ; Weight Gain ; Weight Loss

OBJECTIVES: The purpose of this study was to examine the prenatal, perinatal and developmental risk factors of attention-deficit hyperactivity disorder (ADHD), compared to unaffected siblings (SIB), and typically developing children (TC). METHODS: Subjects with ADHD, their SIB, and TC were recruited from the child psychiatry outpatient clinic of the Asan Medical Center Children's Hospital. The parents of the children completed questionnaires on perinatal and developmental risk factors. RESULTS: Fifty-eight subjects with ADHD (41 boys, 7.7+/-1.3 years), 21 SIB (8 boys, 8.2+/-1.8 years), and 22 TC (8 boys, 8.5+/-2.1 years) were included. The ADHD group showed higher rates of maternal stress during pregnancy than the SIB group (p=.002), and the ADHD group showed higher rates of familial psychiatric history than the TC (odds ratio, 8.76 ; 95% confidence interval, 1.69 to 45.45). CONCLUSION: These findings suggest that among perinatal and developmental factors, maternal stress during pregnancy contribute to the development of ADHD. Future prospective studies will be needed in order to determine the causal relationship between perinatal risk factors and development of ADHD.
Ambulatory Care Facilities ; Child ; Child Psychiatry ; Chungcheongnam-do ; Humans ; Parents ; Pregnancy ; Risk Factors* ; Siblings ; Surveys and Questionnaires

Heorrhage and infarct-like necrosis of anterior lobe of the pituitary gland is one of the characteristic pathologic findings of the autopsied cases of Korean Hemorrhagic Fever (KHF) patients, but there has been rare reports of hypopituitarism in patients with KHF. Recently we have experienced a patient with hyponatremia who had recovered from KHF. He was admitted to our hospital due to nausea, vomiting, and epigastric discornfort. To determine the function of the anterior pituitary gland, hormonal levels of target galnds and pituitary gland were measured, and combined pituitary stimulation test was performed. ACTH, GH, and prolactin deficiency were confirmed by combined pituitary stimulation test in this patient. There was no evidence of hypothalamic or other pituitary diseases by brain MRI. Our experience shows that KHF can be a cause of hypopituitarism and these findings should alert physicians the possibility of hypopituitarisrn in patients who had recovered from KHF.
Adrenocorticotropic Hormone ; Brain ; Hemorrhagic Fever with Renal Syndrome* ; Humans ; Hyponatremia ; Hypopituitarism* ; Magnetic Resonance Imaging ; Nausea ; Necrosis ; Pituitary Diseases ; Pituitary Gland ; Pituitary Gland, Anterior ; Prolactin ; Vomiting

OBJECTIVE: To investigate the incidence of actinomyces-like organisms in routine cervical smears of Korean women and to evaluate its association with the development of pelvic inflammatory disease (PID) in these women. METHODS: The results of cervical smears between 2011 and 2012 at a single university hospital were searched. If positive for actinomyces-like organisms, the medical record of the patient was searched and development of PID was followed. If the data were not available in the medical record, the patient was contacted by telephone. RESULTS: The incidence of actinomyces-like organisms in cervical smears was 0.26% (52/20,390). Forty-two women (80.8%) were intrauterine device (IUD) users: the copper-IUD in 25 women and the levonorgestrel-releasing intrauterine system in 13 women (type unknown in 4 women). The majority (71.4%, 30/42) of the IUD users maintained the IUD. Prophylactic antibiotics were prescribed to 12 women. Two continuous IUD users were later diagnosed with PID, but these cases were not pelvic actinomycosis. CONCLUSION: It would be a reasonable option to choose the expectant management for asymptomatic women who incidentally showed actinomyces-like organisms in their cervical smear.
Actinomycosis ; Anti-Bacterial Agents ; Female ; Humans ; Incidence ; Intrauterine Devices* ; Medical Records ; Pelvic Inflammatory Disease* ; Telephone ; Vaginal Smears*

No abstract available.
Diverticulum ; Thyroid Gland ; Thyroid Nodule

Osteoporosis associated with pregnancy is rare, but it is accompanied by a substantial bone loss, resulting in fracture by minimal trauma. Nevertheless, this clinical significance is often ignored because the pain in various parts of the body is taken as an integral part of the pregnancy and it is possible that milder forms of this condition go unnoticed. Also, this disease is often confused with a variety of other condition associated with pregnancy and misdiagnosed. Although its etiology is still unknown, but variant theory is speculated. Pregnancy and lactation increase the demand on the maternal skeletal calcium restores and underlying genetic susceptibility may cause it. Recently it has been proposed that PTH-related protein may be an important causative factor. There are three types of the pregnancy associated osteoporosis, a transient osteoporosis of the hip in pregnancy, a postpregnancy spinal osteoporosis and a lactation-associated osteoporosis. We present a case of 24-years old women with postpregnancy spinal osteoporosis that showed multiple lumbar compression fracture and biochemical evidence of increased bone resorption.
Bone Resorption ; Calcium ; Female ; Fractures, Compression ; Genetic Predisposition to Disease ; Hip ; Humans ; Lactation ; Osteoporosis* ; Parathyroid Hormone-Related Protein ; Pregnancy ; Young Adult

Exercise testing with Thallium imaging is widely used for the noninvasive evaluation of patients suspected of having coronary artery disease. However, many patients referred for stress testing connot exercise adequately for either physical or psychological reasons, and as a result may have nondiagnostic or suboptimal test results. Intravenous dipyridamole in conjunction with Thallium imaging is as effective alternative method without exercise. But, myocardial imaging using the standard scintillation camera technique(planner view) is hampered by superposition of proximal & distal cardial walls and by the segmental nature of myocardial ischemia. For this reason, Single Photon Emission Computed Tomography(SPECT) reslut in high specificity & sensitivity rates for the detection of coronar artery disease compared with conventional technique. So we performed dipyridamole Th-201 myocardial scintigraphy on 25 subjects who have suspicious angina or myocardial infarction instead of exercise Th-201 myocardial scintigraphy, and compared SPECT view with conventional plannar view. The results obtained are as follows : 1) T1-201 scintigraphic findings in 17 patients with suspicious angina were as follows ; redistribution defect was seen in 4 cases in plannar view and 13 cases in SPECT view. 2) T1-201 scintigraphic findings in 8 patients with myocardial infarction were as follows ; in planner view, perfusion defect was seen in all cases and 1 cases of them, redistribution defect was accompained, and in SPECT view, perfusion defect was seen in all cases and 6 cases of them, redistribution defect was accompained. 3) During dipyridamole infusion, the mean systolic & diatolic pressure decreased from 133+/-22.7/86+/-13.5 to 121+/-23.9/78+/-13.1mmHg and the heart rate increased from 68+/-12.4 to 84+/-12.4beats/min. 4) Adverse effects of dipyridamole were noted in 14(56%) of the subjects, but in 12 of these, the symptoms were mild in severity and subsided spontanously. To summarize, Dipyridamole-201 myocardial imaging is a useful and test for coronary artery disease, and the new tomographic technique, SPECT view, is more useful than the conventional plannar view.
Arteries ; Coronary Artery Disease ; Dipyridamole* ; Exercise Test ; Gamma Cameras ; Heart Rate ; Humans ; Myocardial Infarction ; Myocardial Ischemia ; Myocardial Perfusion Imaging ; Perfusion Imaging* ; Perfusion* ; Sensitivity and Specificity ; Thallium* ; Tomography, Emission-Computed, Single-Photon*

No abstract available.
Humans ; Twins*