STATEMENT OF PROBLEM: Resin cements are widely used in adhesive dentistry specially on all ceramic restorations. It is needed to find out adequate bonding strength between different porcelain surface treatments, commercially available porcelains, and different resin cement systems. PURPOSE: The purpose of this study was to evaluate shear bond strength of resin cements bonded to porcelains in three different modalities; 5 different porcelain surface treatments, 3 different resin cement systems and 3 different commercially available pressable porcelains. MATERIAL AND METHOD: This study consisted of 3 parts. Part I examined the effect of five different surface treatments on the pressable porcelain. Fifty discs (5 mm in diameter and 3 mm in height) of Authentic porcelain were randomly divided into 5 groups (n = 10). The specimens were sanded with 320 grit SiC paper followed by 600 grit SiC paper. The specimens were treated as follow: Group 1-Sandblasting (aluminum oxide) only, Group 2 - sandblasting/silane, Group - sandblasting/acid etching/silane, Group 4 - acid etching only, Group 5 - acid etching/silane. Part II examined the shear bond strength of 3 different resin cement systems (Duolink, Variolink II, Rely X ARC) on acid etching/ silane treated Authentic pressable porcelain. Part 3 examined the shear bond strength of Duolink resin cement on 3 different pressable porcelains (Authentic, Empress I, Finesse). All cemented specimens were stored in distilled water for 2 hours and tested with Ultradent shear bond strength test jig under Universal Instron machine until fracture. An analysis of variance(ANOVA) test was used to evaluate differences in shear bond strength. RESULT: The shear bond strength test resulted in the following: (1) Acid etched porcelains recorded greater shear bond strength values to the sandblasted porcelains. (2) Silane treated porcelains recorded greater shear bond strength values to non-silane treated porcelains. (3) There was no significant difference between sandblasting/acid etching/silane teated and acid etching/silane treated porcelains. However those values were much higher than other three groups. (4) The shear bond strength with Variolink II was lower than the value of Duolink or Rely X ARC. (5) The shear bond strength of Finesse was lower than the value of Authentic or Empress I.
Adhesives ; Ceramics ; Dental Porcelain* ; Dentistry ; Resin Cements* ; Silicon Dioxide ; Water

BACKGROUND: In an effort t enhance long term patency of coronary bypass grafts, utilization of arterial conduits have been on an icrease. With the same objective, we have been using the right gastroepiploic artery (RGEA) in coronary artery bypass procedures since 1998. The current paper has been undertaken with the aim of assessing the apropriateness, problems, and short term results of using the RGEA as an arterial graft conduit by studying the postoperative clinical results of 100 patients than received coronary artery bypass grafting (CARG) with this artery. MATERIAL AND METHOD: Between May of 1998 and May of 1999, an analysis of the mortality, postoperative myocardial infarction, and the need for IABP insertion as a result of low cardiac output were made between 100 consecutive patients undergoing CABG with the RGEA. There was one postoperative death due to cerebral infarction. Postoperative complications/morbidity comprised myocardial infarction in 2, cerebral infarct in 3, reoperation due to bleeding in 1, mediastinitis in 1, and low cardiac output syndrome necessitating IABP in 3 patients. Complicatons related to harvesting of the arterial grafts were not experienced in any of the patients. CONCLUSION: The results of the current data show that utilization of the RGEA in CABG is not associated with increased mortality/morbidity and demonstrates satisfactory short term results suggesting the usefulnessof this conduit as an arterial graft.
Arteries ; Cardiac Output, Low ; Cerebral Infarction ; Coronary Artery Bypass* ; Coronary Vessels* ; Gastroepiploic Artery* ; Hemorrhage ; Humans ; Mediastinitis ; Mortality ; Myocardial Infarction ; Reoperation ; Transplants

We managed surgically a case of local recurrence in esophageal cancer Twenty month after transthoracic subtotal esophagectomy and csophago-gastrostomy, he su(fared from dysphagia. Chest CT and percutaneous needle aspiration biopsy showed. Local recurrence involving residual esophagus, thyroid gland, posterior membraneous portion of trachea. We did cervical esophagectomy, laryngectomy thyroidectomy, partial resection of trachea and reconstruction with free jejunal antograft successfully.
Biopsy, Needle ; Deglutition Disorders ; Esophageal Neoplasms* ; Esophagectomy ; Esophagus ; Laryngectomy ; Needles ; Recurrence* ; Thyroid Gland ; Thyroidectomy ; Tomography, X-Ray Computed ; Trachea ; Transplants*

BACKGROUND AND OBJECTIVES: Sudden sensorineural hearing loss (S-SNHL) has been reported to be associated with hypertension, diabetes mellitus, hyperlipidemia, and stroke in previous studies. The purpose of this study was to confrm whether metabolic syndrome (MS) infuences the hearing outcome of S-SNHL in the Korean population. SUBJECTS AND METHOD: We prospectively investigated the clinical variables of 231 cases of S-SNHL from 2010 March to 2014 February. MS was defned according to the National Cholesterol Education Program Adult Treatment Panel III with Asian modifcations. We analyzed and compared the basic and clinical characteristics, the thresholds of pure tone audiometry (PTA), and the hearing outcomes of patients with MS (MS group) and without MS (NMS group). RESULTS: There were no signifcant differences in the basic characteristics and initial hearing thresholds between the MS and NMS groups; on the other hand, there were signifcant differences in all of the clinical values of MS between the two groups. The average thresholds of final PTA for the MS and NMS groups were 52.9±30.9 dB and 40.5±27.2 dB, respectively, with meaningful diversity (p < 0.01). According to Siegel's criteria, the recovery rate of the NMS group (95/159, 59.7%) was signifcantly higher than those of the MS group (29/72, 40.3%). The proportion of recovery within 5 days after starting the treatment was signifcantly higher of the NMS group (37/95, 39.0%) than those of the MS group (4/29, 13.8%) (p < 0.01). CONCLUSION: The hearing outcome of the NMS group was signifcantly better than those of the MS group.
Adult ; Asian Continental Ancestry Group ; Audiometry ; Cholesterol ; Diabetes Mellitus ; Dyslipidemias ; Education ; Hand ; Hearing Loss, Sensorineural* ; Hearing* ; Humans ; Hyperlipidemias ; Hypertension ; Methods ; Prospective Studies ; Stroke

No abstract available.
Plasma* ; Spectrum Analysis* ; Trace Elements*

A 31-year-old woman with surgically proven spinal extradural granulocytic sarcoma was examined with magnetic resonance (MR) imaging. This patient had no evidence of systemic leukemia. The signal intensities of the mass on T1-weighted and gradient echo images were higher than those of spinal cord, which were different from iso-intensity of cases reported by other authors.
Adult ; Female ; Humans ; Leukemia ; Magnetic Resonance Imaging* ; Sarcoma, Myeloid* ; Spinal Cord

Painful fat hemiation is characterized. by the soft, skin colored painful papules on the heels that appears only when weight is bome and disappears when weight. is taken off the heels. The papules were thought to be caused by hemiation of adipose tissue through connective tissue defect. To our knowledge, such a case or similar one has not been reported previously in Korea. The patient was 30 year-old housewife, who have had soft, skin colored painful papules on the medial aspect of the both heels when weight was placed on the foot. Routine laboratory findings were within normal limit. Skin biopsy revealed nodules of lobulated adipose tissue on the mid-dermis far above the original subcutaneous tissue and large venous channels with thick muscular walls. Hypertrophied peripheral nerve trunks were scattered adjacent to the above vascular structure. Diagnosis was confirmed by clinical and histopathological features. Literatun was briefly reviewed.
Adipose Tissue ; Adult ; Biopsy ; Connective Tissue ; Diagnosis ; Foot ; Heel ; Humans ; Korea ; Peripheral Nerves ; Skin ; Subcutaneous Tissue

Dural metastasis associated with chronic subdural hematoma is very rare in patients with malignant neoplasms; it may be difficult to distinguish malignant neoplasms from chronic subdural hematoma. Chronic subdural hematoma is usually a late manifestation of malignant tumors, which contributes to the severity of the prognosis. The scans obtained by using magnetic resonance imaging or computed tomography may be misleading when a subdural hematoma masks the underlying tumor. Herein, we report a case of a subdural hematoma with dural metastasis of unknown origin in a 45-year-old woman; however, the neoplasm was not detected until autopsy.
Adenocarcinoma ; Autopsy* ; Female ; Hematoma, Subdural* ; Hematoma, Subdural, Chronic ; Humans ; Magnetic Resonance Imaging ; Masks ; Middle Aged ; Neoplasm Metastasis ; Prognosis

PURPOSE: Keratomileusis was performed in rabbits to investigate the effects of corneal epithelium on the corneal stromal keratocyte apoptosis and the effect of human IL-1alpha and TNFalpha on apoptotic genes in human corneal stromal cells was evaluated. METHODS: Fifty six New Zealand white rabbits underwent corneal flap procedure and corneal epithelium was inserted between the corneal flap and underlying stroma. Keratocyte apoptosis was detected with the TUNEL assay. Gene array technique was used to evaluate changes in apoptosis gene in human stromal fibroblasts in response to human recombinant IL-1alpha and TNFalpha in vitro. RESULTS: Keratocyte apoptosis was significantly greater in group for flap with insertion of peripheral epithelium at 4 hours after surgery(p=0.0249). IL-1alpha or TNFalpha regulated the expression of several genes (insulin like growth factor, stress activated protein kinase, GTP binding protein, IGFBP4) up and down in human stromal fibroblasts in culture. CONCLUSIONS: We think that the differences in the stromal cell apoptosis after keratomileusis were due to stromal cell response to various factors of inserted corneal epithelium. We found various new apoptosis gene expression in cultured human keratocytes mediated by IL-1alpha and TNFalpha that were secreted in corneal epithelium. These genes likely trigger the apoptosis of keratocyte following epithelial insertion associated with corneal surgery.
Apoptosis* ; Epithelium ; Epithelium, Corneal* ; Fibroblasts ; Gene Expression ; GTP-Binding Proteins ; Humans ; In Situ Nick-End Labeling ; Keratomileusis, Laser In Situ ; Protein Kinases ; Rabbits ; Stromal Cells ; Tumor Necrosis Factor-alpha

BACKGROUND: The origin site of carcinoma invading esophagogastric junction is variable. It may arise from squamous cell carcinoma of low esophagus, adenocarcinoma arising from Barrett's esophagus, adenocarcinoma of gastric cardia, or extension from proximal stomach cancer. In Korea, the majority of adenocarcinoma invading esophago-gastric junction seems to arise from proximal gastric carcinoma. MATERIAL AND METHOD: We reviewed the data of surgically-resected gastric adenocarcinoma involving esophagogastric junction in KCCH between 1988 and 1999. RESULT: There were 212 cases. Male to female ratio was 156 to 56. Age distribution was between 22 and 78. Variable surgical approaches including median laparotomy, laparotomy with left or right thoracotomy, left thoracotomy, and thoracoabdominal approach were used. Postoperative pathologic stages were : Stage IA-7, IB-11, II-25, IIIA-73, IIIB-34, and IV-57. Curative resection was performed in 199 patients, and total gastrectomy was performed in 200 patients. There were 77.4%(164 cases) with esophageal involvement, 74.1%(157 cases) with tumor involvement in the abdominal LN, and 8%(17 cases) with mediastinal LN metastasis. Operative mortality was 3.3%, and over-all 5 year survival rate was 35%. CONCLUSION: There are various surgical approaches and many things to consider for surgical resection, thoracic and abdominal approach may need for obtain proper resection margin and adequate lymph node dissection in stomach cancer invading esophagogastric junction.
Adenocarcinoma ; Age Distribution ; Barrett Esophagus ; Carcinoma, Squamous Cell ; Cardia ; Esophagogastric Junction* ; Esophagus ; Female ; Gastrectomy ; Humans ; Korea ; Laparotomy ; Lymph Node Excision ; Male ; Mortality ; Neoplasm Metastasis ; Stomach Neoplasms* ; Stomach* ; Survival Rate ; Thoracotomy