The purpose of this study was to compare the wear characteristics of Type III Gold Alloy (Degular C; Degussa AG), VMK 95 (Vita Zahnfabrik), Vitadur Alpha (Vita Zahnfabrik), IPS Empress (Ivoclar-Vivadent) and Targis (Ivoclar-Vivadent). Ten samples of each material were abraded against enamel of extracted incisors for 160,000 cycles on the wear machine. The depth of wear scars on enamel was analized with profilometer (Alpha-step 200; Tencor). And the wear of material specimen was determined with micrometer (PB-1B; Mitutoyo Co. Japan). The results obtained were as follows : 1. Type III gold alloy (2.47micrometer) and Targis (5.89micrometer) caused less wear of enamel specimens compared to VMK 95 (75.59micrometer), IPS Empress (78.60micrometer) and Vitadur Alpha (78.89micrometer) (p<0.05). 2. The wear of material specimen when opposing enamel was the lowest in type III gold alloy (3.0micrometer), followed by Targis (69.8micrometer), IPS Empress (148.4micrometer). VMK 95 (298.0micrometer) and Vitadur Alpha (300.8micrometer) exhibited the most severe wear against enamel (p<0.05).
Alloys ; Cicatrix ; Dental Enamel ; Incisor

PURPOSE: This study was performed to measure the accuracy of adjustable dental impression trays by a scanning laser three-dimensional digitizer. MATERIALS AND METHODS: The metal stock, individual, and adjustable stock trays were used for 60 stone casts(10 casts each) duplicated a resin master model of mandible and maxilla. The type IV dental stone was poured in a vinyl polysiloxane impressions and allowed to set for one hour. The master model and the duplicated casts were digitized using an optical digitizer. The distance between the reference points were measured and analyzed on the graphic image of 3-D graphic software(CATIA version 5.0). The statistical significance of the differences between the groups was determined by a two-way ANOVA. RESULTS: There were no significant differences between the accuracies of the adjustable stock tray and the master model except only anterior arch width on the upper arch and the diagonal arch length and arch length on one side of the lower arch. CONCLUSION: The adjustable stock trays showed clinically acceptable accuracies of the study cast produced by them.
Mandible ; Maxilla ; Siloxanes

BACKGROUND: It is one of anesthesiologist's important tasks to know the accurate recovery state of a patient after general anesthesia. Postanesthetic recovery score (PARS) has been widely used as a measure of evaluating recovery state because it is simple, easy to apply and applicapable to all situations. In this study, we investigated whether there were correlations between PARS and PAR-stay time, and examined factors influencing PAR-stay time. METHODS: Two hundreds and five patients were selected randomly. PARS was measured in each patient immediately after he or she arrived at PAR. Correlations between PARS and PAR-stay time were studied. And other variables such as age, sex, physical status, operation site and anesthetic time were studied as influencing factors on PAR-stay time. RESULTS: There were no significant correlations between PARS and PAR-stay time. PARS was influenced by the operation site only. And PAR-stay time was influenced by the patient's age only. CONCLUSIONS: In evaluating the postanesthetic recovery state, it seems to be important to consider not only PARS but also other factors such as patient's age.
Anesthesia, General ; Humans ; Recovery Room*

Although rare, agranulocytosis is the most serious, potentially fatal side effect of antithyroid drug. We experienced a 13-year-old girl who developed methimazole-induced agranulocytosis at 1 month after the initiation of treatment. Her granulocyte count recovered after discontinuation of methimazole and treatment with broad spectrum-antibiotics, G-CSF, and methylprednisolone. After recovery from agranulocytosis she was treated with radioiodine ablation therapy. Early detection and proper management of antithyroid drug-induced agranulocytosis is very important.
Adolescent ; Agranulocytosis* ; Female ; Granulocyte Colony-Stimulating Factor* ; Granulocytes* ; Humans ; Methimazole ; Methylprednisolone*

BACKGROUND: As the elderly population increases, elderly patients visiting emergency departments (ED) with acute abdominal pain will also likely increase. The underlying causative diseases in these older patients are different from younger patients, usually more serious. Thus, correct diagnosis is very important, but difficult. There needs to be a better understanding of the characteristics of the elderly patient with acute abdominal pain seen in the ED. METHODS: We retrospectively reviewed the medical records of 98 elderly patients (>or=65 years) and 109 adult controls (<65 years) visiting an ED at one general hospital looking at the final diagnoses, characteristics of abdominal pain, admissions, and surgeries. RESULTS: Hepatobiliary tract diseases and bowel obstruction were more common in the elderly patients. The elderly had more admissions and surgeries than younger patients. In addition, they were more likely to have a fatal disease such as myocardial infarction. CONCLUSION: There is a difference in the underlying diseases causing acute abdominal pain in the elderly patients versus younger patients. In terms of frequency of admission and surgery, the elderly present with more serious and fatal diseases. We must consider these features when seeing an elderly patient with acute abdominal pain in an ED.
Abdominal Pain ; Adult ; Aged ; Emergencies ; Hospitals, General ; Humans ; Medical Records ; Myocardial Infarction ; Retrospective Studies

BACKGROUND: The anaphase promoting complex (APC) promotes the degradation of mitotic cyclins as well as other substrates involved in sister chromatid adhesion. This study was carried out to examine the relationship between the APC expression and the clinicopathological variables, in an attempt to determine the role of the APC in the proliferation of lung cancer and to evaluate the possibility of an aberrant APC function in surgically resected squamous cell carcinomas and adenocarcinomas of the lung. METHODS: Immunohistochemical staining was performed for APC, Ki-67, cyclin B1, Cdc2, MMP-2 and VEGF in 55 cases of squamous cell carcinoma and 34 cases of adenocarcinoma of the lung, using the avidin-biotin-peroxidase method. RESULTS: The immunohistochemical stains for APC revealed a positive reaction in 49 cases (55.1%). The APC expression level was higher in the cyclin B1-positive group (p= 0.01), the Cdc2-positive group (p=0.001), the MMP-2-positive group (p=0.03), the group with lymph node metastasis (61.4% vs 48.9%), and the group with stage II/III cancer (60.7%) compared with those with stage I (42.9%). CONCLUSIONS: The APC may have an aberrant function, such as a change in its role in controlling the cell cycle, and might be associated with the invasiveness and proliferation of tumor cells.
Adenocarcinoma* ; Anaphase* ; Anaphase-Promoting Complex-Cyclosome* ; Carcinoma, Squamous Cell* ; Cell Cycle ; Chromatids ; Coloring Agents ; Cyclin B1 ; Cyclins ; Humans ; Lung Neoplasms ; Lung* ; Lymph Nodes ; Neoplasm Metastasis ; Siblings ; Vascular Endothelial Growth Factor A

OBJECTIVES: Polycyclic aromatic hydrocarbons (PAH) and toluene have been reported to induce reactive oxygen species and oxidative stress. This study was performed to investigate the effects of low level exposure to PAHs or toluene on the lipid peroxidation level in elementary school children and the elderly in a rural area. METHODS: Forty seven elementary school children and 40 elderly people who were living in a rural area and not occupationally exposed to PAH or toluene were the subjects of this study. Information about active or passive smoking and diet was obtained using a self-administered questionnaire. The urinary 1-hydroxypyrene (1-OHP), 2-naphthol, hippuric acid and thiobarbituric acid reactive substance (TBARS) concentrations were measured, and these values were corrected with the urinary creatinine concentration. RESULTS: In school children, the geometric means of the urinary 1-OHP, 2-naphthol, hippuric acid and TBARS levels were 0.02 ymol/mol creatinine, 0.47 micron mol/mol creatinine, 0.14 g/g creatinine and 0.95 micron mol/g creatinine, respectively. Those values for the elderly were 0.07 micron mol/mol creatinine, 1.87 micron mol/mol creatinine, 0.11 g/g creatinine and 1.18 micron mol/g creatinine, respectively. The mean levels of urinary 1-OHP, 2-naphthol and TBARS were significantly higher in the elderly subjects than in the children. The urinary TBARS level was not correlated with the urinary 1-OHP, 2-naphthol and hippuric acid, but they were correlated with the age of the subjects. CONCLSIONS: These results suggest that low level inhalation exposure to PAH or toluene does not markedly increase lipid peroxidation, and age is a significant determinant of lipid peroxidation.
Child ; Environmental Exposure/*adverse effects ; Environmental Pollutants/*toxicity ; Female ; Humans ; Male ; Middle Aged ; Polycyclic Hydrocarbons, Aromatic/*toxicity ; *Rural Population ; Thiobarbituric Acid Reactive Substances/*analysis ; Toluene/*toxicity ; Urinalysis

To investigate the underlying mechanisms of C18 fatty acids (stearic acid, oleic acid, linoleic acid and alpha-linolenic acid) on mast cells, we measured the effect of C18 fatty acids on intracellular Ca2+ mobilization and histamine release in RBL-2H3 mast cells. Stearic acid rapidly increased initial peak of intracellular Ca2+ mobilization, whereas linoleic acid and alpha-linolenic acid gradually increased this mobilization. In the absence of extracellular Ca2+, stearic acid (100 microM) did not cause any increase of intracellular Ca2+ mobilization. Both linoleic acid and alpha-linolenic acid increased intracellular Ca2+ mobilization, but the increase was smaller than that in the presence of extracellular Ca2+. These results suggest that C18 fatty acid-induced intracellular Ca2+ mobilization is mainly dependent on extracellular Ca2+ influx. Verapamil dose-dependently inhibited stearic acid-induced intracellular Ca2+ mobilization, but did not affect both linoleic acid and alpha-linolenic acid-induced intracellular Ca2+ mobilization. These data suggest that the underlying mechanism of stearic acid, linoleic acid and alpha-linolenic acid on intracellular Ca2+ mobilization may differ. Linoleic acid and alpha-linolenic acid significantly increased histamine release. Linoleic acid (C18:2: omega-6)-induced intracellular Ca2+ mobilization and histamine release were more prominent than alpha-linolenic acid (C18:3: omega-3). These data support the view that the intake of more alpha-linolenic acid than linoleic acid is useful in preventing inflammation.
alpha-Linolenic Acid ; Fatty Acids* ; Histamine Release* ; Inflammation ; Linoleic Acid ; Mast Cells ; Oleic Acid ; Verapamil

Purpose: This study aimed to evaluate the accuracy and clinical usability of an identification model using deep learning for 79 dental implant types. Materials and Methods: A total of 45396 implant fixture images were collected through panoramic radiographs of patients who received implant treatment from 2001 to 2020 at 30 dental clinics. The collected implant images were 79 types from 18 manufacturers. EfficientNet and Meta Pseudo Labels algorithms were used. For EfficientNet, EfficientNet-B0 and EfficientNet-B4 were used as submodels. For Meta Pseudo Labels, two models were applied according to the widen factor. Top 1 accuracy was measured for EfficientNet and top 1 and top 5 accuracy for Meta Pseudo Labels were measured. Results: EfficientNet-B0 and EfficientNet-B4 showed top 1 accuracy of 89.4. Meta Pseudo Labels 1 showed top 1 accuracy of 87.96, and Meta pseudo labels 2 with increased widen factor showed 88.35. In Top5 Accuracy, the score of Meta Pseudo Labels 1 was 97.90, which was 0.11% higher than 97.79 of Meta Pseudo Labels 2. Conclusion All four deep learning algorithms used for implant identification in this study showed close to 90% accuracy. In order to increase the clinical applicability of deep learning for implant identification, it will be necessary to collect a wider amount of data and develop a fine-tuned algorithm for implant identification.

PURPOSE: The purpose of this study was to investigate the usefulness of heart-type fatty acid binding protein (H-FABP) and ischemia modified albumin (IMA) to differentiate the causes of cardiac arrest. METHODS: From May 2007 to November 2007, we prospectively studied 27 patients who presented to the emergency department with sudden collapse. The blood samples collected during cardiopulmonary resuscitation (CPR) were centrifuged at 3000 rpm for 10 min, and the obtained serum was stored at -70degrees C. RESULTS: Cardiac arrest were caused by cardiac disease (N=7, 26%), trauma (N=7, 26%) and other disease (N=13, 48%). The patients with cardiac cause showed significantly increased H-FABP levels compared to the patients with noncardiac causes (39.7+/-19.3 ng/mL vs 24.6+/-16.9 ng/mL, respectively, p=0.048). The cut-off value of H-FABP was 29.05 ng/mL (sensitivity 85%, specificity 75%). The IMA showed no statistical difference between the patients with cardiac causes and those with non-cardiac causes (86.6+/-29.9 U/mL vs 107.4+/-39.4 U/mL, respectively, p=0.219). There were no significant differences of the H-FABP and IMA levels between the return of spontaneous circulation (ROSC) group and the non-ROSC group, and also between the survival and death groups. A higher H-FABP concentration was correlated with a longer arrest time, and mortality was correlated with a longer CPR time. CONCLUSION: The IMA is not changed according the cause of arrest, but the H-FABP is useful to diagnose the cardiac causes of arrest.
Biomarkers ; Cardiopulmonary Resuscitation ; Carrier Proteins ; Emergencies ; Heart Arrest ; Heart Diseases ; Humans ; Ischemia ; Prospective Studies ; Sensitivity and Specificity ; Serum Albumin