The purpose of this study was to evaluate the propriety of making use of the light-cured resin base in indirect bracket bonding technique by study of shear bond strength and failure patterns according to the material of resin base. Metal brackets were bonded to the stone models of specimens involving bovine lower incisor with chemical-cured(Excel), light-cured(Light-Bond) and thermal-cured(Therma-Cure) resin. They were transferred to the specimens and bonded using sealant. The shear bond strength was tested on Instron. After bracket removal, the bracket base was examined and assessed with the adhesive remnant index(ARI). The results were as follows: 1. No significant differences in shear bond strength were found among the three groups (P>0.05). 2. No significant differences in Alts score were found among the three groups (P>0.05). The above results suggest that light-cured resin base in addition to chemical-cured and thermal-cured resin bases is useful in the indirect bonding technique.
Adhesives ; Incisor

Dysfunctions of ubiquitin-proteasome system and toxicity of dopamine have been known as the key mechanisms in the pathogenesis of Parkinson's disease (PD) and proteasome inhibitors are widely used in experimental models of PD to reproduce cell death of dopaminergic neurons. In the present study, immortalized human neural stem cells (HB1.F3, F3) and those transfected with human aromatic acid decarboxylase gene (F3.AADC), were used to investigate the mechanism of selective dopaminergic neuronal cell death mediated by dopamine or proteasome inhibitors. Flow cytometric analysis revealed that F3.AADC was more susceptible to dopamine than parental F3 cell which does not carry dopaminergic phenotype. The dopamine-induced apoptosis was mediated by activation of caspases 3 and 9 and cleavage of PARP. Proteasome inhibitors also induced apoptosis in dose-dependent manner but there was no difference between cell types. Prolonged exposure to subtoxic dose of proteasome inhibitors further enhanced dopamine-induced apoptosis in the F3.AADC, and increased presence of alpha-synuclein and ubiquitin-positive inclusions was noted in the cytoplasm of apoptotic cells by immunocytochemistry. These findings indicate that dopaminergic cells are selectively susceptible to dopamine toxicity and prolonged suppression of proteasome system further enhances selective sensitivity to dopamine toxicity. Chronic subtoxic proteasomal dysfunction of dopaminergic cells might contribute to selective cell death of dopaminergic neurons during the pathogenesis of Parkinson's disease.
alpha-Synuclein ; Apoptosis ; Caspases ; Cell Death ; Cytoplasm ; Dopamine ; Dopaminergic Neurons ; Humans ; Immunohistochemistry ; Models, Theoretical ; Neural Stem Cells ; Parents ; Parkinson Disease ; Phenotype ; Proteasome Endopeptidase Complex ; Proteasome Inhibitors

BACKGROUND: Coronary artery disease(CAD) has been related to a number of factors, including diabetes, smoking,hypertension, blood lipids, and family history of CAD. However, a few studies have examined the correlation between these factors and severity of CAD. In the present study, we aimed to define the correlation between risk factors and the severity of CAD. METHODS: The study population was 309 consecutive patients who underwent coronary angiography in Kang Nam St. Marys hospital between Mar. 1992 and Aug. 1994. We analyzed risk factors of CA ; age, total cholesterol(TC), triglyceride, high density lipoprotein cholesterol(HDL-C), low density lipoprotein cholesterol cholesterol(LDL-C), the ratio of TC to HDL-C, Lp(a), uric acid, fibrinogen, diabetes, hypertension, smoking, and family history of CAD. All films were reviewed without specific knowledge of blood laboratory results. Significant occlusive disease was defined as >50% diameter obstruction of a major coronary vessel. Extent of disease was defined as the number of major coronalry arteries with significant occlusive disease. RESULTS: 1) Statistically significant risk factors between one vessel disease group and multivessel disease group are age, TC, LDL-C, and diabetes in total patients and age, LDL, and diabetes in male patients. But there is no significant difference in female patients. 2) In patients with multivessel disease, age, HDL-C level are significantly lowere, and TG level and the percentage of smkoing are significantly higher, in male than female. 3) There is increase in four major risk factors(diabetes, hypertension,smoking,hypercholesterolemia) with the increased number of diseasesd coronary arteries; normal coronary group has 1.07 risk factors, one vessel disease group 1.30, two vessel disease group 1.49, and three vessel disease group 1.78. 4) In total and male patients, three independent variables are significantly associated with severity of CAD. These variables are age, smoking, and diabetes. In female patients, diabetes in only significant independent risk factor. CONCLUSION: The significant independent risk factors associated with severity of CAD are age, diabetes, and smoking in total and male patients. Whereas in female patients, diabetes is only significant independent risk factor.
Arteries ; Cholesterol, LDL ; Coronary Angiography ; Coronary Artery Disease* ; Coronary Vessels* ; Female ; Fibrinogen ; Humans ; Hypertension ; Lipoproteins ; Male ; Risk Factors* ; Smoke ; Smoking ; Triglycerides ; Uric Acid

OBJECTIVES: This study was conducted to assess the potential health impacts and improve the quality of the free immunization program in Jinju City by maximizing the predicted positive health gains and minimizing the negative health risks. METHODS: A steering committee was established in September 2010 to carry out the health impact assessment (HIA) and began the screening and scoping stages. In the appraisal stage, analysis of secondary data, a literature review, case studies, geographic information systems analysis, a questionnaire, and expert consultations were used. The results of the data collection and analyses were discussed during a workshop, after which recommendations were finalized in a written report. RESULTS: Increased access to immunization, comprehensive services provided by physicians, the strengthened role of the public health center in increasing immunization rates and services, and the ripple effect to other neighboring communities were identified as potential positive impacts. On the other hand, the program might be inaccessible to rural regions with no private clinics where there are more at-risk children, vaccine management and quality control at the clinics may be poor, and vaccines may be misused. Recommendations to maximize health gains and minimize risks were separately developed for the public health center and private clinics. CONCLUSIONS: The HIA provided an opportunity for stakeholders to comprehensively overview the potential positive and negative impacts of the program before it was implemented. An HIA is a powerful tool that should be used when developing and implementing diverse health-related policies and programs in the community.
Child ; Child, Preschool ; Female ; *Health Policy ; Humans ; Immunization/*statistics & numerical data ; Immunization Programs/standards/*statistics & numerical data ; Korea

BACKGROUND: Pulmonary venous flow velocity pattern (PVFVP) is widely used to assess LV diastolic function. It is known that the parameters of PVFVP have a significant correlation with the ratio of peak early diastolic filling velocity (E) to peak filling velocity at atrial contraciton (A) measured in the transmitral flow. However, the correlations between parameters of superior vena caval flow (SVCF) and transtricuspid E/A ratio have not been reported. Therefore the present investigation was performed to elucidate these correlations. METHODS: Fifty patients (26 men, mean age 63.1+/-11.1 years), who did not have significant tricuspid valvular disease and restrictive filling pattern on tricuspid and superior vena caval doppler, were included in this study. SVCF was recorded with the transducer positioned at subxiphoid area and the sample volume placed 2 cm within the superior vena cava. Blood flow across the tricuspid valve was obtained from standard four chamber view or modified parasternal four chamber view with the sample volume placed on leaflet tips. Recording was made during midexpiratory apnea. The following doppler parameters were measured: transtricuspid E and A velocity, E/A ratio: systolic (S) and diastolic (D) peak velocities and time velocity integrals (TVI), S/D velocity ratio, S/D TVI ratio, atrial reversal peak velocity (ArV) and TVI (ArTVI) in SVCF. RESULTS: 1) In SVCF, S velocity (63.7+/-11.8 cm/s vs 73.4+/-13.6 cm/sec, p<0.05), S TVI (17.4+/-3.6 cm vs 21.1+/-6.2 cm, p<0.05), ArV (30.0+/-6.9 cm/s vs 37.2+/-7.3 cm/s, p<0.005), and ArTVI (2.7+/-0.8 cm vs 3.3+/-0.8 cm, p<0.01) were significantly decreased in group E/A>1. And D TVI (7.1+/-3.0 cm vs 5.2+/-3.1 cm, p<0.05) and D/S TVI ratio (0.41+/-0.13 vs 0.26+/-0.14, p<0.05) were significantly increased in group E/A>1. 2) As E/A ratio increased, diastolic TVI (r=0.315, p<0.05) and D/S TVI ratio (r=0.448, p<0.001) increased, and ArTVI (r=-0.376, p<0.01) and ArV (r=-0.416, p<0.01) decreased. 3) As E peak velocity increased, SVCF D peak velocity increased (r=0.305, p<0.05). CONCLUSIONS: Tricusupid E/A ratio has positive correlations with D TVI and D/S TVI ratio, and negative correlations with ArTVI and ArV. But there were no correlations in S velocity, D velocity, and S/D velocity ratio as the relation of mitral E/A ratio with PVFVP.
Apnea ; Humans ; Male ; Transducers ; Tricuspid Valve ; Vena Cava, Superior

Peripheral arterial occlusive disease caused by atherosclerosis can present with intermittent claudication or critical limb ischemia. Proper diagnosis and management is warranted to improve symptoms and salvage limbs. With the introduction of new techniques and dedicated materials, endovascular recanalization is widely performed for the treatment of peripheral arterial occlusive disease because it is less invasive than surgery. However, there are various opinions regarding the appropriate indications and procedure methods for interventional recanalization according to operator and institution in Korea. Therefore, we intend to provide evidence based guidelines for interventional recanalization by multidisciplinary consensus. These guidelines are the result of a close collaboration between physicians from many different areas of expertise including interventional radiology, interventional cardiology, and vascular surgery. The goal of these guidelines is to ensure better treatment, to serve as a guide to the clinician, and consequently, to contribute to public health care.
Arterial Occlusive Diseases/radiography/*therapy ; Arteries/pathology ; Endovascular Procedures/*standards ; Humans ; Intermittent Claudication/radiography/therapy ; Limb Salvage/methods ; Lower Extremity/*blood supply ; Peripheral Arterial Disease/radiography/*therapy ; *Practice Guidelines as Topic ; Republic of Korea

Hypertension may be due to either vascular (renal artery stenosis) or nonvascular (urologic) causes in hypertensives with unilateral small kidneys. Generally, the occurrence of hypertension in association with difference in kidney size suggests the presence of prolonged renal artery stenosis. This condition can result in decreased volume of the poststenotic kidney. Another cause of small kidneys is unilateral renal agenesis, renal dysplasia with or without reflux, tubular obstruction, and hydronephrosis. Hypertension can be attributed to abnormal-sized kidneys. Nephrectomy of the small kidney or correction of the stenotic artery normalizes blood pressure. De Jong and associates reported 8 cases of young women thought to have hypertension caused by unilateral renal parenchymal disease. Renal angiography, however, disclosed significant renal artery stenosis in the contralateral kidney of all 8 patients. Revascularization of the kidney with stenotic lesions cured the hypertension. The data suggests that in patients suspected of having hypertension caused by unilateral renal parenchymal disease, not only should renal venous renins be determined, but nephrectomy should not be peformed as well until renal angiography has been performed to exclude contralateral renal artery stenosis. We report a case of unilateral renal artery stenosis with contralateral hypoplastic kidney in a 22 year old woman; hypertension was corrected by successful anastomosis of the stenotic artery without nephrectomy of the contralateral small kidney.
Angiography ; Arteries ; Blood Pressure ; Female ; Humans ; Hydronephrosis ; Hypertension ; Hypertension, Renal* ; Kidney* ; Nephrectomy ; Renal Artery Obstruction* ; Renal Artery* ; Renin ; Young Adult

Transesophageal echocardiography is a useful device to evaluate the posterior structure of heart with an advantage of enabling clearer images, as compared to transthoracic echocardiography. With intraoperative transesophageal echocardiography, we can reconfirm pre-diagnosed lesions, determine the success of the operation, and in particular, diagnose new lesions that are undetected in pre-operative evaluation. In the present case, undiagnosed patent ductus arteriosus was found on intraoperative transesophageal echocardiography during cardiopulmonary bypass. Subsequently, the patent ductus arteriosus was ligated successfully. With transesophageal echocardiography, we can diagnose the structural and functional abnormality of heart unidentified in the pre-operative evaluation. Also, transesophageal echocardiography can play the role of a rescuer to solve the problems that occur during cardiopulmonary bypass.
Cardiopulmonary Bypass* ; Ductus Arteriosus, Patent* ; Echocardiography ; Echocardiography, Transesophageal* ; Heart ; Humans

PURPOSE: We wanted to evaluate the efficacy and toxicity of modified FOLFOX-6 chemotherapy for treating recurrent or inoperable gastric cancer patients. MATERIALS AND METHODS: From April 2006 to August 2007, 35 patients with recurrent gastric cancer after curative resection and 43 patients with inoperable gastric cancer underwent chemotherapy, and the results were retrospectively investigated. RESULTS: 78 patients were assessable for response and toxicity, and they underwent an average of 7.1 cycles of chemotherapy. The response was evaluated according to the RECIST criteria. 11 partial responses (14.1%), 35 cases of stable disease (44.9%), and 32 cases of progressive disease (41%) were observed. The median time to progression was 6 months, and the average overall survival was 13 months. CTCAE grade 1 or 2 anemia (52.6%) was the most prevalent toxicity. Other common toxicities included thrombocytopenia (17.9%) and peripheral neuropathy (30.8%). There were 13 changes in the chemotherapy regimen to S1-cisplatin due to disease progression, but only an average of 1.76 cycles of S1-cisplatin were delivered due to severe toxicities and poor compliance. CONCLUSION: Acceptable efficacy and toxicity were seen as 59% of the patients showed non-progression, and no grade 3 or 4 toxicities were observed. In conclusion, the modified FOLFOX-6 chemotherapy is considered to be the proper 1st-line choice as a palliative treatment for recurrent or inoperable gastric cancer patients.
Anemia ; Disease Progression ; Humans ; Organoplatinum Compounds ; Palliative Care ; Peripheral Nervous System Diseases ; Retrospective Studies ; Stomach Neoplasms ; Thrombocytopenia

Cardiac involvement in systemic lupus erythematosus(SLE) is common and has been reported in more than 50% of the patients at the same stage during their illness. SLE can affect the heart in a number of ways;myocarditis, pericarditis, aortic insufficiency, hypertensive heart disease, and coronary arteritis. In recent years, with prolonged survival and improvement in diagnostic modalities, the cardiovascular manifestations of SLE have become more apparent. Coronary artery disease has a number of possible pathogenic mechanisms;atherosclerosis, coronary arteritis, spasm, and hypercoagulability. For management purposes, differentiation between arteritis and artheroslerosis is important. Atherosclerosis in the coronary as well as other vessels appears to be accelerated by SLE. Cardiovascular care to the SLE patients should be emphasized, because corticosteroid treatment and auto-immune mechanisms of SLE are able to promote the atherosclerosis of coronary arteries. We report 36-year-old otherwise healthy female with SLE who presented with severe ischemic heart disease requiring coronary by-pass surgery.
Adult ; Arteritis ; Atherosclerosis ; Coronary Artery Disease* ; Coronary Vessels ; Female ; Heart ; Heart Diseases ; Humans ; Lupus Erythematosus, Systemic* ; Myocardial Ischemia ; Pericarditis ; Spasm ; Thrombophilia