This study was performed to evaluate the tensile bond strength and modulus of elasticity of three permanent soft denture liners (Molloplast B , Ufi Gel C , Tokuyama ) before and after thermocycling. And their water sorption were also evaluated. Each soft denture liner was bonded to PMMA denture base resin blocks and the tensile bond strength and modulus of elasticity were measured by using universal testing machine. For the water sorption, weight measured after immersion of soft denture liners in 37+/-1degrees C water bath for 4 weeks. The results were as follows : 1. Molloplast B had the highest tensile bond strength, while Tokuyama had the lowest tensile bond strength, There was no significant difference between Tokuyama and Molloplast B in the both nonthermocycling and thermocycling. There was significant difference in tensile strength of Tokuyama before and after thermocycling(p<0.05). 2. For the modulus of elasticity, there was no significant difference between Ufi Gel C and Tokuyama in the both nonthermocycling and thermocycling. There was significant difference in modulus of elasticity of Tokuyama before and after thermocycling(p<0.05). 3. The failure modes of Molloplast B and Ufi Gel C were nainley adhesive type and that of Tokuyama was mainly mixed type in case of nonthermocycling and cohesive type after thermocycling. 4. The water sorption of each soft liners was within+/-2% in times (p<0.05) but, there was no significant difference among the soft liners in times.
Adhesives ; Baths ; Denture Bases ; Denture Liners* ; Dentures* ; Elastic Modulus ; Immersion ; Polymethyl Methacrylate ; Tensile Strength ; Water

BACKGROUND: Intussuseception is one of the most common diseases requiring abdominal emergency care in early childhood. The delay in diagnosis increases morbidity and, in particular, reduces the success rate of the non-surgical method of reduction. In this report, the authors determined the clinical characteristics of pediatric patients with intussusception, and the factors involved in delayed diagnosis and the efficacy of doppler ultrasonography in diagnosis. METHODS: The authors performed a retrospective study of 44 cases in 42 patients with intussusception who had visited the emergency room of SamSung medical center from January 1st to December 31, 1996. RESULTS: The sex ratio was equal and 64.3% of the patients were under 1 year of age. The prevalent complaints were vomiting(36.4%) and abdominal pain(33.8%). Ultrasonography was used in 11 cases, 3 of them were performed because of obscure symptoms and the rest were due to diagnostic delay. The average time past from visit to diagnosis was 4 hours and 20 minutes, and there were 4 diagnostic delays. Air enema reductions were unsucessful in 11 cases(25%) and that was related to hospital-visit delays and long time past from symptom onset to diagnosis. There were no motalities. CONCLUSION: To reduce delays in diagnosis and unnecessary operations, the use of doppler ultrasonography is recommanded in suspicious cases. And to reduce the hospital-visit delays, related to the failure on non-surgical reduction, the education about this disease is necessary.
Delayed Diagnosis ; Diagnosis ; Education ; Emergencies* ; Emergency Medical Services ; Emergency Service, Hospital* ; Enema ; Humans ; Intussusception* ; Retrospective Studies ; Sex Ratio ; Ultrasonography ; Ultrasonography, Doppler

Malignant myoepithelioma is a rare neoplasm of salivary gland which may either arise de novo or develop in a pre-existing pleomorphic adenoma. The malignant myoepithelioma occurs in 0.45% of major salivary gland tumors. Malignant myoepitheliomas arising in the pleomorphic adenoma number less than 20 in English literature and 1 in Korea. We describe a case of malignant myoepithelioma arising in a recurrent pleomorphic adenoma of the left parotid gland of a 61-year-old man. The tumor was ill-defined and composed of polygonal or plasmacytoid myoepithelial cells. Infiltration to surrounding tissue, hemorrhage, necrosis, increased mitotic activity and vascular tumor emboli indicated its malignant nature. There were several satellite nodules with histologic features of typical pleomorphic adenoma. Immunohistochemically, tumor cells were reactive for S-100 protein, AE1/AE3, vimentin, smooth muscle actin and glial fibrillary acid protein.
Actins ; Adenoma, Pleomorphic* ; Glial Fibrillary Acidic Protein ; Hemorrhage ; Humans ; Korea ; Middle Aged ; Muscle, Smooth ; Myoepithelioma* ; Necrosis ; Parotid Gland ; S100 Proteins ; Salivary Glands ; Vimentin

Congenital absence of the lower sternum, defect of the abdominal wall, defects of the anterior diaphragm, pericardial defects and cardiac anomalies had been described as a syndrome by Cantrell et al. Developing mechanism of the syndrome was embryologically defined. These defects arise apparently from combined anomalies of developing of the dorsal mesoderm. The authors present two cases of Cantrell's syndrome developed in one day old and eight months old female patient in which angiocardiography was done at the Department of Radiology, Seoul National University Hospital.
Abdominal Wall ; Angiocardiography ; Diaphragm ; Female ; Humans ; Mesoderm ; Seoul ; Sternum

Leukemia is the commonest malignancy in childhood, accounting for about one-third of all malignancies in thosebelow the age of 15 years. Authors analysed the chest PA findings of 177 cases of leukemia in childhood below theage of 15 years, diagnosed at Seoul National University Hospital in recent 5 years since 1978. The summaries ofthe analysis are as follows; 1. Among 177 cases, 121 cases were male and 56 cases were female. The malepredominant than the female with the ratio of 2.2:1. In 177 cases, 77% of the patients were under the 10 years ofage. 2. The incidence of subtype of leukemia was as follows; The acute form was 158 cases (89%), acute lymphocyticleukemia, 55%, acut myelocytic group, 31.6%, chronic myelocytic type, 10%. And acute lymphocytic leukemia was61.4% of acute form. 3. The incidence of abnormality in chest PA was 32.2%(57 cases) . Among these 57 cases,abnormality in lung field was 35 cases (19.8% of total patients) hilar and mediastinal lymph nodes enlargement was19 cases(10.7%). Pleural effusion was 13 cases (7.3%) and cardiac shadow enlargement in chest PA was 3 cases.
Child ; Female ; Humans ; Incidence ; Leukemia ; Lung ; Lymph Nodes ; Male ; Pleural Effusion ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; Seoul ; Thorax

No abstract available.
Pilomatrixoma* ; Vaccination*

No abstract available.

This study examined burdens of primary family carcgivcrs of paticnto with cerebrovascular accidents (CVA) along with related factors. In addition, their needs for support group intervention were assessed to develop a support group to reduce the burdens of caregiving. Eighty-one primary family caregivers of patients with CVAs at a general hospital in Seoul participated in this study . The patients with CVAs aged from 26 to 83 years with mean age of 63 years. About 90% of the patients had some paralysis and 56.6% suffered speech problems. Fifty-eight percent of the primary family caregivers were spouses of the patients and 80.2% were women. Primary family caregivers' burdens were assessed by the Burden Scale originally devel oped by Zarit (1980) and Novak & Geust(1989) and modified by Jang (1995) for use in Korea. The instrument consists of six subscales time-dependent burden, developmental burden, physical burden, emotional burden, social burden, and financiaI burden. The results were as follows : 1. The average of burden score was 91.7, indicating moderate to severe level of burden. The time-dependent burden was scored highest followed by physical, developmental, social, financial, and emotional burdens. 2. of the characteristics of patients, age, gender, and severity of the disease were found to be associated with the level of burden. Of the characteristics of primary family caregivers, age and educational level were significantly related to the level of burden. Time of care since the CVA and the quality of relationship between a patient and a caregiver prior to the stroke were significant situational factors affecting the level of burden. 3. The need for support group intervention for the caregivero was very high (95.1%). The earcgivcrs of patients who had a CVA for the first time showed higher levels of need compared to those of patients who had a CVA more than once. The caregivers indicated a support group held once a month near home or hospital would be welcomed. In addition, they replied that a group composed of 9 to 10 caregivers and guided by health care professionals (e.g., physicians and nurses) would be most desirable. More than 85% of the earegivers identified the areas that they wanted intervention in as follows : knowledge, skills, and resources to care for a patient with a CVA. the counsel of health care professionals, share of their experiences with those who have similar situations, stress management skills, and methods to overcome emotional isolation due to the great responsibility for a patient. Given the results, support group is expected to be an effective way to reduce the burdens of primary family caregivers of patients with CVAs. As a follow up It is necessary to examine the effect of support group intervention on the patient's recovery and rehabilitation.
Caregivers* ; Delivery of Health Care ; Female ; Hospitals, General ; Humans ; Korea ; Paralysis ; Rehabilitation ; Self-Help Groups* ; Seoul ; Spouses ; Stroke*

Idiopathic small bowel ulceration occurring beyond the duodenum is rare, and less than 5% of all the reported cases have occurred in children. In most of the cases, single ulcer of unknown cause is observed in jejunum or ileum. The diagnosis is difficult and usually made at the time of surgical exploration for the complications, such as perforation, hemorrhage or obstruction. We experienced a case of perforation of idiopathic ileal ulceration due to blunt abdominal trauma in a 11-year-old boy. The ileal segment including the lesion was resected and the pathologic findings were compatible with idiopathic small bowel ulceration. The clinical and pathological aspects are discussed, and the literatures were reviewed.
Child* ; Diagnosis ; Duodenum ; Hemorrhage ; Humans ; Ileum ; Jejunum ; Male ; Ulcer*

No abstract available.
Animals ; Binding Sites* ; Carbon Monoxide* ; Carbon* ; Rats* ; Serotonin*