The effects of pretreatment of Co-Cr alloy, including two adhesive primers that contain either MDP or MAC-10, and silicoating on the bond. The results obtained as follows : Strength of 4-META/MMA-TBB resin were investigated using FT-IR SEM, and EDAX. in the SEM observation of surface morphologies, the sandblasted specimen exibited a very rough surface, whereas the surfaces of the two groups primed with either MDR or MAC-10 were covered with a layer of primer, and the surface morphology of the silicoated specimen remained almost the same after sandblasting. Before the thermocycling tests, the group treated with MDP demonstrated the highest mean tensile bond strength and the sandblasted group showed the lowest bond strength. After 20,000 themocyling, the mean tensile bond strength of the sandblasted group exhibited a 50% reduction in bond strength, while the other showed a 20~30% reduction. Observation of the metal-resin interface revealed that in all groups the resin permeated the rough surface formed by sandblasting thereby producing a mechnical bond between the metal and the resin, It was also found that thermocycling resulted in a gap formation at the metal-resin interface of the specimens, and the sandblasted group exhibited a larger gap width than the other groups. in fracture mode, all specimens indicated a cohesive fracture within the resin before thermocycling. However, thermocyling produced adhesive failure at the edge of the resin-metal interface in most specimens, The sandblasted group, which exhibited the lowest bond strength after thermocycling, also demonstrated the largest area of adhexive failure.
Adhesives ; Alloys*

We managed three cases of anesthesia for living related liver transplantation from December 1994 to July 1995. Donors were recipient's parents and two of them were 35-year old man, the other was 25-year-old woman. The recipients were suffered from congenital liver diseases (two of them were diagnosed as biliary atresia and the other Byler's disease). They had presented severe jaundice and cholangitis and their mean age & body weight were 15 +/- 4.9 months and 8.6 +/- 1.22 kg, respectively. Average duration of anesthesia was about 15 hours, and anhepatic time was 140 minutes, 80 m inutes and 50 minutes, respectively. Careful attention was paid to body temperature, serum potassium, ionized calcium, blood coagulation function, as well as to general condition and respiratory function. Hemodynamic value was relatively stable through out the operation and postoperative mechanical ventilatory support was required for about 3 days.
Adult ; Anesthesia ; Biliary Atresia ; Blood Coagulation ; Body Temperature ; Body Weight ; Calcium ; Child* ; Cholangitis ; Female ; Hemodynamics ; Humans ; Jaundice ; Liver Diseases ; Liver Transplantation* ; Liver* ; Parents ; Potassium ; Tissue Donors*

BACKGROUND AND OBJECTIVES: The transradial approach for coronary intervention has a lower incidence of access site complications and can increase patient comfort after percutaneus tansluminal coronary angioplasty(PTCA). The purpose of this study is to compare procedural success and complication rates of percutaneous transradial coronary stenting which was performed by four operators in two hospitals with those using transfemoral approach. MATERIALS AND METHOD: From September 1998 to July 1999, one hundred seventy five consecutive patients(201 lesions) treated with coronary stent implantation were enrolled for this study : 84 patients underwent transradial coronary stenting(Radial Group), and 91 patients transfemoral coronary stenting(Femoral Group). RESULTS: Seven patients who failed coronary cannulation via radial artery were crossed over to the Femoral Group. The measurements of the radial artery were not done. Patient demographics were similar in both groups. Procedural success was similar in both group(95.2% in Radial Group vs. 97.8% in Femoral Group, p=S). All transradial coronary stenting were possible using conventional guiding catheters which are used in transfemoral intervention. Local vascular complication rates showed a trend toward a reduction in the Radial Group(2.4% vs. 8.8%, p=.06). CONCLUSION: This study showed the similarity in the safety and efficacy of transradial coronary stenting compared to those of transfemoral approach.
Catheterization ; Catheters ; Demography ; Humans ; Incidence ; Radial Artery ; Stents*

Familial or hereditary breast cancer has genetic heterogeneity and is transmitted vertically in an autosomal dominant fashion. About 5 to 10% of breast cancers are caused by the inheritance of mutations in dominant susceptibility genes. We retrospectively reviewed 50 breast cancer patients from 44 families. These patients had treated their breast cancer at the Department of Surgery, Yonsei University College of Medicine, from 1981 to 1996. There were no statistically significant differences between the familial breast cancers and the sporadic breast cancers in such clinicopathologic characteristics as major complaint, tumor location, tumor size, metastasis to axillary lymph nodes, stage distribution, histology distribution and hormone receptor status. For familial camcers, the mean survival was 125 months, the overal 5-year survival rate was 85%, and the overall 5-year disease-free survival rate was 70%.
Breast Neoplasms* ; Breast* ; Disease-Free Survival ; Genetic Heterogeneity ; Humans ; Lymph Nodes ; Neoplasm Metastasis ; Retrospective Studies ; Survival Rate ; Wills

No abstract available.
Vitelline Duct*

Axillary breast is one of the varieties of polymastia which is characterized by the presence of more than 2 breasts. It may cause symptoms during pregnancy, lactation, or in the premenopausal period. Unless there are obvious symptoms of lactation or the assistance of further imaging studies such as mammography and breast ultrasound, the diagnosis is often confused with subcutaneous lipoma. The incidence of axillary breast cancer is low but it should be investigated and treated properly in view of another breast cancer in the embryonic milk-line. In this paper we reviewed 4 cases of axillary breast cancer and documented some articles regarding aberrant breast and carcinoma arising from it. It is suggested that subcutaneous nodules of uncertain origin around the periphery of the breast should be viewed with suspicion and treated properly.
Adenocarcinoma, Mucinous/pathology* ; Adenocarcinoma, Mucinous/complications ; Adult ; Aged ; Breast/abnormalities* ; Breast Neoplasms/pathology* ; Breast Neoplasms/complications ; Carcinoma, Infiltrating Duct/pathology* ; Carcinoma, Infiltrating Duct/complications ; Case Report ; Female ; Human ; Middle Age

PURPOSE: To describe the HRCT and pathologic findings of squalene-induced lipoid pneumonia in rabbits. MATERIALS AND METHODS: Three ml of squalene was instilled into the trachea between the second and the third tracheal ring in 16 rabbits. Serial HRCT scans were obtained on day 4 (n=8), at 1 week (n=7), 2 weeks (n=1), 4 weeks(n=1), 6 weeks (n=2) and 20 weeks (n=1) after squalene instillation. With sacrifice of the rabbits pathology was reviewed at 1 week (n=3), 4 weeks (n=3), and 6 weeks (n=4) after CT scans. RESULTS: Lipoid pneumonia was induced in 8 rabbits; lesions were distributed mainly in the dependent posterior lung. On serial HRCT scans, airspace consolidation, as seen on an air-bronchogrm, and nodular opacities were early findings; these gradually diminshed and with time were replaced by nodular & linear opacities. Histologically, pulmonary fibrosis appeared one week after squalene instillation and progressed over time. Alveolar septal thickening and cuboidal change of the alveolar lining epithelium were more prominent at week 6. CONCLUSION: The early change of squalene-induced lipoidpneumonia in rabbits is the proliferation of intraalveolar macrophage, which is responsible for air-space consolidation with air-bronchograms on HRCT. Nodular and linear opacities on HRCT are due to the appearance of pulmonary fibrosis one week after squalene instillation, and its subsequent progression.
Animals ; Epithelium ; Lung ; Macrophages ; Pathology ; Pneumonia* ; Pulmonary Fibrosis ; Rabbits* ; Squalene ; Tomography, X-Ray Computed ; Trachea

No abstract available.
Bone Marrow* ; HL-60 Cells* ; Humans ; Interferon-gamma*

OBJECTIVE: This study was carried out to determine the effects of occupational pesticides exposure on the level of serum Luteinizing Hormone(LH), Follicle Stimulating Hormone(FSH), testosterone in male workers. METHODS: Twenty-two male workers exposed to pesticides were compared with twenty-eight male workers at same factory who were not exposed to pesticides. The selected variables for studying reproductive hormones were LH, FSH and testosterone. As part of the baseline health status, subjects were asked medical history. RESULTS: There were no statistically significant differences on the level of LH, FSH, testosterone between the exposed and non-exposed group. Also the level of sex hormones were not significant difference with each department in exposed group. And the level of LH, FSH positively correlated with age. CONCLUSIONS: These results indicate that there are no alterations in LH, FSH, testosterone at workers exposed to pesticides. But our findings are highly preliminary because of a small sample size. Thus it calls for furthur investigation of the hormonal effects at workers exposed to pesticides.
Gonadal Steroid Hormones* ; Humans ; Lutein ; Male ; Pesticides* ; Sample Size ; Testosterone

We reviewed the educational goals and objectives of the 32 medical schools in Korea, which is based on the 1992's, 1994's, and 1996's edition of the Directory of Korea Medical Education. The purpose of this study is to find trend of their changes and to help revise them. Among the 32 medical schools in Korea, 31(96.9%) described goals and objectives separately on 1996's edition, while 26(81.3%), 19(59.4%) on 1994's, 1992's, respectively. The medical ethics and morality was becoming more important; 30(93.8%) medical schools on 1996's and 1994's edition, while 26(81.3%) on 1992's. There were more emphases on the promotion of the ability of community services in health and of self study. For the promotion of the ability of community services in health; 26(81.3%) medical schools on 1996's edition, while 23(71.9%), 19(59.4%) on 1994's, 1992's, respectively. For the promotion of the ability of self study; 25(78.1%) medical schools on 1996's edition, while 21(65.6%), 15(46.9%) on 1994's, 1992's, respectively. The cultivation of primary care physician was becoming the primary goal of medical schools; 23(71.9%) medical schools on 1996's edition, while 12(37.5%), 9(28.1%) on 1994's, 1992's respectively. Teaching medical knowledge and clinical skills were still regarded as important; 21(65.6%) medical schools on 1996's edition, while 20(62.5%), 23(71.9%) on 1994's, 1992's, respectively. The inclusion of medical scientists in the possible job lists was also eminent; 14(43.8%) medical schools on 1996's edition, while 11(34.4%), 6(18.8%) on 1994's, 1992's, respectively. The ultimate educational goal of university was becoming prominent; 21(65.6%) medical schools on 1996's edition, while 15(46.9%), 11(34.4%) on 1994's, 1992's, respectively.
Clinical Competence ; Education, Medical ; Ethics, Medical ; Humans ; Korea* ; Morals ; Physicians, Primary Care ; Schools, Medical* ; Social Welfare