PURPOSE: The purpose of this study was to investigate the diametral tensile strength of polymer-based temporary crown and fixed partial denture (FPD) materials, and the change of the diametral tensile strength with time. MATERIAL AND METHODS: One monomethacrylate-based temporary crown and FPD material (Trim) and three dimethacrylate-based ones (Protemp 3 Garant, Temphase, Luxtemp) were investigated. 20 specimens (the empty set 4 mm x 6 mm) were fabricated and randomly divided into two groups (Group I: Immediately, Group II: 1 hour) according to the measurement time after completion of mixing. Universal Testing Machine was used to load the specimens at a cross-head speed of 0.5 mm/min. The data were analyzed using one-way ANOVA, the multiple comparison Scheffe test and independent sample t test (alpha = 0.05). RESULTS: Trim showed severe permanent deformation without an obvious fracture during loading at both times. There were statistically significant differences among the dimethacrylate-based materials. The dimethacrylate-based materials presented an increase in strength from 5 minutes to 1 hour and were as follows: Protemp 3 Garant (23.16 - 37.6 MPa), Temphase (22.27 - 28.08 MPa), Luxatemp (14.46 - 20.59 MPa). Protemp 3 Garant showed the highest value. CONCLUSION: The dimethacrylate-based temporary materials tested were stronger in diametral tensile strength than the monomethacrylate-based one. The diametral tensile strength of the materials investigated increased with time.
Acrylic Resins ; Bisphenol A-Glycidyl Methacrylate ; Collodion ; Composite Resins ; Crowns ; Denture, Partial, Fixed ; Methacrylates ; Polymethacrylic Acids ; Tensile Strength

To investigate the pathogenesis of the duodenal ulceration produced by mepirizole (1-(4-methoxy-6-methyl-2-pyrimidinyl)-3-methyl-5-methoxypyrazole) in rat, the effects of various concentraion and sorts of antiulcer drugs and truncal vagotomy on the mepirizole (200 mg/kg of body weight) induced duodenal ulcers were observed morphologically, and after mepirizole administration (200 mg/kg), amount and acidity of gastric jucie were measured sequently. The results were as follows: 1) In the control group of fasting for 24 hours after mepirizole administration only, duodenal ulcers were developed in all animals with 21.5+/-5.8 mm2 of ulcer index, perforation rate was 15%, and mortality rate was 0%. But lesions of the stomach were hemorrhagic and erosive with erosion index of 3.8+/-1.6 mm2. 2) The antiulcer drugs were significantly inhibited duodenal ulceration and gastric erosion produced by mepirizole although the inhibition effects were different. 3) After truncal vagotomy, duodenal ulcer and gastric erosion induced by mepirizole were also significantly inhibited. 4) On the gastric analysis, decrease of amount, increase of acidity, and decrease of concentration of gastric juice were observed after administration of mepirizole compared with nontreated normal group. Above findings suggest that the pathogenesis of the duodenal ulceration by mepirizole is the action of gastric acid on the duodenal mucosa with breakdown of defence mechanisms of the duodenum.
Animals ; Mortality

BACKGROUND: In diagnosis or monitor of the airway obstruction in bronchial asthma, the measurement of FEV1 in the standard method because of its reproducibility and accuracy. But the measurement of peak expiratory flow(PEF) by peak flow meter is much simpler and easier than that of FEV1 especially in children. Yet there have been still no data of the predicted normal values of PEF measured by peak flow meter in Korean children. This study was conducted to provide equations to predict the normal value of PEF and correlation between PEF and FEV1 in healthy children. METHOD: PEF was measured by MiniWright peak flow meter, and the forced expiratory volume and the maximum expiratory flow volume curves were measured by Microspiro HI 501(Chest Co.) in 346 healthy children (age:5-16 years, 194 boys and 152 girls) without any respiratory symptoms during 2 weeks before the study. The regression equations for various ventilatory parameters according to age and/or height, and the regression equations of FEV1 by PEF were derived. RESULTS: 1. The regression equation for PEF(L/min) was:12.6×age(year)+3.4×height(cm)-263(R2=0.85) in boys, and 6×age(year)+3.9×height(cm)-293(R2=0.82) in girls. 2. The value of FEFmax(L/sec) derived from the maximum expiratory flow volume curves was multiplied by 60 to compare with PEF(L/min), and PEF was faster by 125 L/min in boys and 118 L/min in girls, respectively. 3. The regression equation for FEV1(ml) by PEF(L/min) was:7×PEF-550(R2=0.82) in boys, and 5.8×PEF-146(R2=0.81) in girls, respectively. CONCLUSION: This study provides regression equations predicting the normal values of PEF by age and/or height in children. And the equations for FEV1, a gold standard of ventilatory function, was predicted by PEF. So, in taking care of children with airway obstruction, PEF measured by the peak flow meter can provide useful information.
Airway Obstruction ; Asthma ; Child* ; Diagnosis ; Female ; Forced Expiratory Volume ; Humans ; Reference Values

The ocular ischemic syndrome includes the ocular symptoms and sins secondary to severe carotid artery obstruction and is characterized by rubeosis iridis, anterior uveitis, retinal hemorrhage, cherry red spot, and neovascularization of the disc and/or retina. Recently, the authors have experienced a case of ocular ischemic syndrome in a 82 years old woman, who had neovascular glaucoma associated with ipsilateral internal carotid artery obstruction. Diagnosis was made by doppler ultrasonographic finding of atheroma of internal carotid artery.
Aged, 80 and over ; Carotid Arteries ; Carotid Artery, Internal* ; Diagnosis ; Female ; Glaucoma, Neovascular ; Humans ; Plaque, Atherosclerotic* ; Prunus ; Retina ; Retinal Hemorrhage ; Ultrasonography, Doppler* ; Uveitis, Anterior

Purpose: Laparoscopic hepatectomy has been widely performed by hepatobiliary surgeons for malignancy of liver and gained wide acceptance for various liver tumors, thanks to advances in surgical techniques and devices. But, there are some challenges for right side tumor in patients of cirrhotic liver. Especially, tumor located in right upper area is difficult for wedge resection in patients with marginal liver function, because trans-abdominal approach requires normal parenchymal dissection. Radiofrequency wave ablation is also difficult for such a lesion. So, we demonstrate unique technique of video-assisted transthoracic liver resection (VTLR) for overcome right upper side tumor abutting diaphragm. Methods: Four patients underwent VTLR. Four ports in right chest wall were created by a chest surgeon and diaphragm was open. Then traction of the diaphragm was done by suture. After exposure of liver surface, tumor localization was done by ultrasound. The mass excision was done by ultrasonic shear. Results: Four patients were discharged without complications within 11.3 days (range, 6–15 days). On average, patients started to consume a normal diet on an average of 2.4 days (range, 1–4 days). Conclusion VTLR is could be performed by an experienced surgeon and chest surgeon for right upper liver malignancy abutting diaphragm in patient of marginal liver function.

Heterotopic pregnancy is defined as simultaneous intrauterine and extrauterine pregnancy. The incidence of heterotopic pregnancy was about 1 to 30,000 pregnancies, but it has been increased. This increased incidence is explained by the rise in PID, pelvic surgery, IUD and assisted reproductive technologies-in vitro fertilization/gamate intrafallopian insemination/intrauterine insemination. Thus careful pelvic examination combined with serial beta-hCG determinations and transvaginal sonography to evaluate the adnexal region are necessary prerequisites for early diagnosis. We report a case of heterotopic pregnancy following in ovulation induction and intrauterine insemination with a brief review of literature.
Early Diagnosis ; Female ; Gynecological Examination ; Incidence ; Insemination* ; Ovulation Induction* ; Ovulation* ; Pregnancy ; Pregnancy, Ectopic ; Pregnancy, Heterotopic*

Sleep disturbance and restless legs syndrome (RLS) among uremic patients is known to be high, but data on the prevalence, clinical significance, and causative factors are limited. A semiquantitative sleep and RLS questionnaire was distributed to 62 chronic hemodialysis(HD) patients. 74.5N had sleep complaints and frequent awakening was the most frequent specific sleep complaints followed by daytime sleepiness. Presence of diabetes mellitus(DM), RLS, depres- sion, high CRP level, low intact parathyroid hormone level, low subjective global assessment score, and short HD duration were associated with more sleep complaints. 58.3N had RLS and presence of DM, low serum albumin level were also associated with more severe RLS. But Kt/V, protein catabolic rate, hematocrit, plasma bicarbonate level, use of erythropoietin and sleep medication were not associated with sleep complaints and RLS. Sleep problems and RLS are comrnon in HD patients and seem to be associated with malnutrition. Presence of DM, de- pression, and RLS are likely to contribute the high prevalence of sleep disturbance.
Erythropoietin ; Hematocrit ; Humans ; Malnutrition ; Parathyroid Hormone ; Plasma ; Prevalence ; Renal Dialysis* ; Restless Legs Syndrome ; Serum Albumin ; Surveys and Questionnaires

A series of clinical studies on the psychiatric aspects of hemodialysis and kidney transplantation were done with Korean patients, kidney donors, their families and unit nurses. All subjects were interviewed and evaluated for their psychiatric reactions and symptoms and for the underlying causes. Depression was the most common reaction, although the clinical features were somewhat different between groups studied. In addition, a unique and episodic psychotic syndrome was found in four patients. Depression and psychotic episodes seemed to reflect the psychodynamic components such as instinctual frustration, physical, familial and financial loss, dependency on a machine, sensory deprivation and the so-called fear of death and fear of life. These seemed to follow the unique features of hemodialysis and transplantation. The main defense mechanism seemed to be denial. The possible role of psychiatrists was discussed for evaluation, treatment, and prevention of these reactions and for the support of the family and the treatment team.
dult ; Aged ; Female ; Human ; Kidney Transplantation* ; Korea ; Male ; Middle Age ; Renal Dialysis/psychology* ; Transplantation, Homologous/psychology*

No abstract available.
Uterine Cervical Neoplasms*

The development and differentiation of cells in the spinal ganglion were studied by electron microscopy in human fetuses ranging from 12 mm to 260 mm crown rump length. At 12 mm embryo the primitive neuroblasts which had a single process, contained a large numbers of free ribosome and mitochondria but very little rough endoplasmic reticulum. At 30 mm fetus, the primitive spinal ganglion consisted of bipolar neuroblasts, satellite cells and undifferentiated cells. Spindle-shaped bipolar neuroblasts formed spinal ganglion of loosely grouped cells at 50 mm fetus. Two neuroblast cell types, a small cell contained large clumps of rough endoplasmic reticulum at periphery, could be distinguished. At 80 mm fetus, the spinal ganglion constituted of bipolar neuroblast with apparently random distribution of small and large neurons with processes, together with satellite cells and blood vessels. The presences of a large numbers of neurotubules in the Golgi-central region were one of the first sign of further maturation of the neuroblast. During next prenatal stage from 120 mm on fetus, the ganglion cells were large and contained much rough endoplasmic reticulum, neurotubules and extensive Golgi complex. A large number of neuroblasts became transformed into unipolar cells from 180 mm to 260 mm feuts. Nissl bodies appeared during this stage. The ganglion-satellite cell boundary became complicated with increasing age, then enlarging in parallel with the increase in volume of the nerve cell. During next prenatal stage up to 180 mm fetus, the unipolar ganglion cell increased in number and size, and the cytoplsm contained all intracytoplasmic structures which were also found in mature spinal ganglion except for large pigment granules.
Blood Vessels ; Crown-Rump Length ; Embryonic Structures ; Endoplasmic Reticulum, Rough ; Fetus* ; Ganglia, Spinal* ; Ganglion Cysts ; Golgi Apparatus ; Humans* ; Microscopy, Electron ; Mitochondria ; Neurons ; Nissl Bodies ; Ribosomes