For many years permanent soft denture liners has been widely used in dental practice directly or indirectly because of its function in absorbing and distributing the impact force. However, it reveals problems such as lack of permanency and decreased bond strength in long term use. The purpose of this study is to measure the bond strength and failure between denture base resin and several permanent liners. Lucitone 199 was used as denture base resin with soft acrylic liners (Triad, Tokuso Rebase) and silicone elastomers (Tokuyama, Ufi Gel C) bonded to measure the tensile strength before and after thermocycling. The thermocycling was done in 2000 cycles at 5degrees C, 26degrees C and 55degrees C and the measured tensile strength values before and after thermocycling were compared. The mode of failure was investigated in the separated specimens. The results are as follows. 1. As to tensile strength, the strongest material is Tokuso Rebase followed by Triad, Tokuyama, Ufi Gel C in before thermocycling and the order of Triad, Tokuso Rebase, Tokuyama, Ufi Gel C in after thermocycling state. There was significant difference between the values of Triad, Tokuso Rebase and Tokuyama, Ufi Gel C(p<0.05). 2. As to degree of displacement, Ufi Gel C showed most displacement with or without thermocycling treatment and also the difference was significant with the other materials(p<0.05). 3. As to comparisons before and after thermocycling, Tokuso Rebase and Tokuyama showed significant difference in bond strength, whereas Triad and Tokuso Rebase showed significant difference in the degree of displacement(p<0.05). 4. In debonded specimens, Triad and Ufi Gel C showed adhesion failure and Tokuyama showed cohesion failure. Both failures were observed in Tokuso Rebase with adhesion failure up to 70%. The results of this study showed that degree of bond strength between permanent soft denture liner and denture base resin were variable. There was a significant difference between soft acrylics and silicone elastomers with regard to bond strength. Further research in improving bond strength of widely used silicone elastomers and in developing the method of measuring bond strength between denture base resin and the lining materials is needed.
Denture Bases* ; Denture Liners* ; Dentures* ; Silicone Elastomers ; Tensile Strength

No abstract available.
Mass Screening*

OBJECTIVE: The pathogenesis of endometriosis is generally accepted that retrograde menstruation and alterations in the local pelvic immune environment. This study was performed to help elucidate what kind of role various cytokines might play in the pathogenesis of endometriosis. METHOD: Concentrations of peritoneal fluid cytokines were compared in 7 women with normal pelvic finding and 23 women with endometriosis by enzyme-linked immunosorbent assay(ELISA). The patterns of cytokine mRNA expression in 8 ovarian endometrioma and 12 superficial pelvic endometriosis lesions were investigated by reverse transcription-polymerase chain reaction(RT-PCR) amplification method. RESULT: Both IL-6 and IL-10 levels in peritoneal fluid specimens with endometriosis tended to be higher than normal. However, there were no significant differences between peritoneal fluid concentrations of IFN-gamma, TNF-alpha, IL-1beta, and IL-5 of women with and without endometriosis. The levels of IL-6 and IL-10 were significantly higher in peritoneal fluid of women with severe endometriosis compared to women with mild endometriosis. IL-1beta mRNA was expressed in all of 8 deep and 12 superficial endometriosis lesions. IL-5 and IL-6 mRNA were expressed in only two black lesions respectively, however, both were not expressed in the all deep lesions. Expressions of IL-10 mRNA occurred in one red and one black lesion while this was expressed in only one of the deep lesions. TNF-alpha mRNA was expressed in one red and one black lesion of 12 superficial lesions compared with four of the deep lesions. There was the difference between kinds of increased cytokines in the peritoneal fluid and those of expressed cytokines in the endometriotic lesions of patients with endometriosis. CONCLUSION: This study supports the concept that local immunologic factors may be important in the pathogenesis and pathophysiology of endometriosis. The pattern of cytokine mRNA expression of endometriotic lesions would seem to indicate that proinflammatory cytokines such as IL-1beta and TNF-alpha are responsible for the development or progression of endometriosis.
Ascitic Fluid ; Cytokines ; Endometriosis* ; Enzyme-Linked Immunosorbent Assay ; Female ; Humans ; Immunologic Factors ; Interleukin-10 ; Interleukin-5 ; Interleukin-6 ; Menstruation Disturbances ; RNA, Messenger* ; Tumor Necrosis Factor-alpha

BACKGROUND: The aims of our study were to determine the correlation of the strain variation and degree of homogeneity of infecting Helicobacter pylori (H. pylori) with their disease outcomes, and the relevance of duodenal H. pylori expression of cagA and/or vacA gene to the development of duodenal ulcer in Korean patients. METHODS: One hundred and twenty bacterial colonies isolated from different anatomical sites of the stomach and duodenum were used. The study population was consisted of 40 Korean patients, 21 with duodenal ulcer, 7 with gastric ulcer, 3 with combined gastric and duodenal ulcer, and 9 with chronic gastritis. Genomic characteristics of each strain were analyzed by random amplified polymorphic DNA (RAPD) fingerprinting. The cagA and vacA genes were detected by polymerase chain reaction (PCR). RESULTS: PCR-based RAPD was proved to be a reliable method for the discrimination of individual bacterial genomic characteristics. Genomic fingerprinting showed a varying degree of inter- and intra-patient variation. Thirteen patients (32.5%) were colonized by a single strain throughout the corpus, antrum and duodenum, whereas the other 27 (67.5%) harbored multiple H. pylori strains. Thirty-six isolates (90.0%) each from the corpus and antrum, and 34 (85.0%) from the duodenum, expressed the cagA gene. The prevalence of duodenal H. pylori expression of the cagA gene was not different between patients with chronic gastritis and those with duodenal ulcer. All isolates were positive for both genes vacA s1 and vacA s1a. CONCLUSION: These results suggested that many of the H. pylori-infected Korean patients were actually colonized with mixed populations of different H. pylori strains and that the prevalence of duodenal H. pylori expression of the cagA and/or vacA gene was not correlated with the development of duodenal ulcer in Korean patients.
Adolescent ; Adult ; Aged ; Antigens, Bacterial/*analysis/genetics ; Bacterial Proteins/*analysis/genetics ; DNA, Bacterial/*analysis ; Female ; Genome, Bacterial ; Helicobacter Infections/epidemiology/*microbiology ; Helicobacter pylori/*genetics/isolation & purification ; Human ; Korea/epidemiology ; Male ; Middle Aged ; Peptic Ulcer/*microbiology ; Prevalence ; Random Amplified Polymorphic DNA Technique ; Support, Non-U.S. Gov't

BACKGROUND: Endotoxin, the component of outermembrane of gram negative organism, plays an important role in the initiation and amplification of inflammatory reaction by its effects on inflammatory cells. Until recently, there have been continuing efforts to delinate the mechanisms of the signal trasduction pathway of endotoxin stimuli on inflammatory cells. By uncovering the mechanisms of signal transduction pathway of endotoxin stimuli, we can expect to have tools to control the excessive inflammatory responses which sometimes may be fatal to the involved host. It was generally accepted that endotoxin exerts its inflammatory effects through inflammatory cytokines that are produced by endotoxin-stimulated inflammatory cells and there were some reports on the importance of protein kinase C and protein tyrosine kinase activation in the production of inflammatory cytokines by endotoxin. So we evaluated the effect of pretreatment of protein kinase C inhibitors (H7, Staurosporin) and protein tyrosine kinase inhibitors(Herbimycin, Genistein) on the endotoxin-stimulated cytokines(IL-8 & TNF-alpha) mRNA expression. METHOD: Peripheral blood monocytes were isolated from healthy volunteers by Ficoll-Hypaque density gradient method and purified by adhesion to 60mm Petri dishes. Endotoxin(LPS 100ng/ml) was added to each dishes except one control dish, and each endotoxin-stimulated dishes was preincubated with H7, Staurosporin(protein kinase C inhibitor), Herbimycin or Genistein(protein tyrosine kinase inhibitor) respectively except one dish. Four hours later the endotoxin stimulation, total RNA was extracted and Northern blot analysis for IL-8 mRNA and TNF-alpha mRNA was done. RESULT: Endotoxin stimulation increased the expression of IL-8 mRNA and TNF-alpha mRNA expression in human peripheral blood monocyte as expected and the stimulatory effect of endotoxin on TNF-alpha mRNA expression was inhibited by protein kinase C inhibitors(H7, Staurosporin) and protein tyrosine kinase inhibitors (Herbimycin, Genistein). The inhibitory effect of each drugs was increased with increasing concentration. The stimulatory effect of endotoxin on IL-8 mRNA was also inhibited by H7 and protein tyrosine kinase inhibitors (Herbimycin, Genistein) dose-dependently but not by Staurosporin. CONCLUSION: Protein kinase C and protein tyrosine kinase are involved in the endotoxin induced signal transduction pathway in human peripheral blood monocyte.
Blotting, Northern ; Cytokines ; Healthy Volunteers ; Humans ; Interleukin-8 ; Monocytes* ; Phosphotransferases ; Protein Kinase C* ; Protein Kinases* ; Protein-Tyrosine Kinases* ; RNA ; RNA, Messenger ; Signal Transduction* ; Tumor Necrosis Factor-alpha

Pulmonary Embolism can develop in variable conditions, and presents with nonspecific symptoms and signs. If diagnosis is delayed, it can be resulted in catastrophic results. Therefore, early diagnosis and adequate treatment is crucial in Pulmonary Embolism. Lung Perfusion Scan is useful screening test. Negative result can exclude pulmonary embolism, But, perfusion defects don't always mean pulmonary embolism. To find the better methods of interpretation of king perfusion scan and To evaluate the clinical course and outcomes of the patients, in whom pulmonary embolism was suspected by lung perfusion scan, we reviewed the clinical records of 49 cases suspected by lung perfusion scan at Seoul National University Hospital during the period of January, 1995 to July, 1996. The results are as follows. First impression of cases in which PE was present at time of admission were pulmonary embolism (63%), heart diseases (26%), and pneumonia (11%) in orders. Underlying diseases of cases in which PE developed during admission were malignancy (36.5%), 10-I (22.7%), sepsis (13.7%), and SLE (9.1%) in orders. The predisposing factors were operation (20%), cancer (16%), immobility (16%), connective tissue disease (16%), heart dis. (10%), old age (10%), and preg/pelvic dis. (8%) The results of lung perfusion scan were HPPE 40cases(26.8%), IPPE 21 cases(14.1%), LPPE 88 cases(59.l %) and cases(%) of treatment in these cases were HPPE 34 cases(85%), IPPE 9 cases(42,9%), IPPE 0 case(0.0%). Treatments were heparin and warfarin (69.5%), heparin alone (8.2%), warfarin alone (2.0%), embolectomy(4.1%), thrombolytics (20%), IVC filter (2.0%), and no treatment (12.2%) In 34 cases (694%), follow up could be done, and 5 cases were recurred (10.2%). The causes of recurrence was incomplete anticoagulant therapy (3 cases) 2rnd recurrence of predisposing factor (2 cases). Expired case due to pulmonary embolism was one who was expired just before trial of thrombolytie therapy. CONCLUSION: Efforts should be made to shorten the interval from onset of Sx to Dx, ie, high index of suspision.
Causality ; Connective Tissue Diseases ; Diagnosis ; Early Diagnosis ; Follow-Up Studies ; Heart ; Heart Diseases ; Heparin ; Humans ; Lung* ; Mass Screening ; Perfusion* ; Pneumonia ; Pulmonary Embolism* ; Recurrence ; Seoul ; Sepsis ; Warfarin

OBJECTIVE: To evaluate the clinicopathologic variables that are important for predicting residual disease after cervical conization in hysterectomy specimens. METHODS: We performed retrospective review of 125 patients who had undergone cervical conization and endocervical curettage followed by subsequent hysterectomy. Pathologic findings of the cone margins, endocervical curettage samples, and residual lesions in the postcone hysterectomy specimens were recorded for analysis. RESULTS: The prevalence rates of positive cone margins increased with higher severity of cervical neoplasia. There was a statistically significant difference in the prevalence of residual disease in hysterectomy specimens between patients with positive endocervical margins on cone biopsy(67.3%) and those with negative margins(11.8%) (p<0.01). Most residual lesions in the postcone hysterectomy specimens were similar to cone pathology, however the possibility of more advanced lesions in the uterus was present in patients with positive cone margins. Residual disease was significantly more frequently found in patients with positive endocervical curettage(82.4%)(p<0.01). Especially, when both the endocervical margin and endocervical curettage were positive, residual disease was present in 25 of 28 (89.3%) hysterectomy specimens. CONCLUSIONS: From these results, we concluded that the status of endocervical margin and endocervical curettage have significant predictive value with respect to the presence or absence of residual disease, and final decision in regard to subsequent management should be based on histologic finding of the cone margins and endocervical curettage as well as the patient's age and desire to retain reproductive capability.
Conization* ; Curettage ; Humans ; Hysterectomy ; Pathology ; Prevalence ; Retrospective Studies ; Uterus

OBJECTIVE: To define the pathologic changes underlying the mechanism of shrinkage of uterine leimyoma in patients treated with goserelin. METHODS: Retrospective evaluation of pathologic changes seen in leiomyoma removed by hysterectomy or myomectomy in treated and untreated patients was done. Microscopic review of all cases was performed without knowledge of the therapeutic history. Each leiomyoma was assessed for hyalinization, hydropic change, lymphocytic infiltrate, nuclear atypia, and hypercellularity. RESULTS: Hyaline degeneration and hydropic changes were found significantly more frequent in patient treated with goserelin (P<0.05). The differences between treated and untreated groups in lymphocytic infiltrate, nuclear atypia, and hypercellularity were not statistically significant. The ultrastructural features of variable numbers of the treated muscle cells showed large vacuole, marked swelling of mitochondria, and compound lysosomal structures presumed to have been formed from damaged intracellular organelles. CONCLUSION: It appears that the rapid decrease in size of the leiomyoma treated with goserein occurs as the smooth muscle tissue undergoes hydropic change and hyaline degeneration. It seems that other cellular degenerative changes may be involved in the mechanism shrinkage of uterine leiomyoma.
Gonadotropin-Releasing Hormone* ; Goserelin* ; Humans ; Hyalin ; Hysterectomy ; Leiomyoma* ; Mitochondria ; Muscle Cells ; Muscle, Smooth ; Organelles ; Retrospective Studies ; Vacuoles

Purpose: We report a case of neuroretinitis combined with external ophthalmoplegia in a patient who developed a cerebral venous sinus thrombosis after administration of a SARS-CoV-2 vaccine.Case summary: A 26-year-old woman who was on oral contraceptives was diagnosed with a cerebral venous sinus thrombosis 1 month after the first injection of a SARS-CoV-2 vaccine (BNT162b2, Pfizer-BioNTech). The levels of factors 8 and 9 were elevated on the blood test. The corrected visual acuities were 0.3 in both eyes. A complete limitation of abduction and esotropia were evident in the left eye. Both eyes exhibited optic disc swelling and hemorrhage and retinal nerve fiber layer swelling. Subretinal fluid was apparent in the right eye. Three weeks later, the optic disc swellings and hemorrhages had worsened and both eyes evidenced macular stars. After 10 months, the corrected visual acuities improved to 0.9 in both eyes. Ocular motor function and the esotropia also improved. However, the overall contraction of the visual field did not. Conclusions SARS-CoV-2 vaccination can trigger cerebral venous sinus thrombosis, neuroretinitis, and external ophthalmoplegia. In patients with risk factors for such thrombosis, the possibility of ophthalmic complications should be considered after administration of a SARS-CoV-2 vaccine.

Hemorrhage from esophageal varices is a catastrophic complication of portal hypertension. Endoscopic variceal ligation(EVL) is a newly developed technique that may replace Endoscopic injection sclerotherapy(EIS). But there are a few reports of longterm follow-up of EVL in Korea. We analysed 42 patients to evaluate longterm effect of EVL for esophageal varices. Total 689 variceal ligations were performed during 117 separate EVL sessions. Control rate of acute bleeding was 90.5%(38 of 42 patients). Four patients who were failed on control of acute bleeding were taken EIS with successful bleeding control. The eradication rate of esophageal varix was 76.2%(32 of 42 patients), the mean session for eradication of varix was 3,0(2-6), the number of bands per person was 16.0(5-41), and the number of bands per session was 6.0(4-11). Rebleeding after initiation of EVL occured in 1l of 42 patient(26,2%). 81.8% of rebleeding occurred 6 months later after EVL was done. The mortality rate and survival rate after varix eradication during follow-up period(after 6-45 months, mean: 15.5 months) was each 14.3%(6/42) and 85.7%(36/ 42). The causes of death were hepatic failure (3/6), esophageal variceal bleeding(2/ 6) and hepatic encephalopathy(l/6). After EVL, the~re were no serious treatment-re lated complications: except mild complications: mild chest pain in 5 patient(12.0%), mild substernal pain in 7 patients(16.6%). These results suggest that EVL is a safe and effective method for treatment of variceal bleeding control and eradication of esophageal varices with least serious complication. But regular periodic examination(interval of 4-6 months) and repeat EVL after eradication of varices should be required becuse of recurrence of varix and rebleeding.
Cause of Death ; Chest Pain ; Esophageal and Gastric Varices* ; Follow-Up Studies* ; Hemorrhage* ; Humans ; Hypertension, Portal ; Korea ; Ligation* ; Liver Failure ; Mortality ; Recurrence ; Survival Rate ; Varicose Veins