1.ACCURACY OF IMPROVED STONE CASTS FROM ELASTOMERIC IMPRESSION MATERIALS.
Kee Hong KIM ; Ik Tae CHANG ; Soon Ho YIM
The Journal of Korean Academy of Prosthodontics 1999;37(3):301-312
The purpose of this study was to compare the accuracy of currently used elastomeric impression materials for complete arch impression taking. Five elastomers (Impregum, Permlastic, Express, Extrude, Examix) and one Irreversible hydrocolloid (Aroma-fine) were tested. For each material, 5 impressions were made of stainless steel model to which five tapered posts were attached. Custom trays were used for polyether and polysulfide impression materials, and putty/wash two step technique was used for addition polyvinylsiloxane impression materials. Improved stone models were poured to all impressions. Accuracy of the materials was assessed by measuring ten distances on stone dies poured from impressions of the master model. All measurements for master and improved stone models were with three dimensional measuring machine. The results were as follows 1. The dimensional accuracy of polyether, extrude, and examix were significantly superior to polysulfide, exress, and alginate in reproducing full arch mode (p<0.05). 2. There were no statistical differences in dimensional accuracy for full arch impression between polyether, extrude and examix (p>0.05). 3. there were no statistical differences in dimensional accuracy between polysulfide, express, and alginate (p>0.05). 4. There were no statistical differences between addition polyvinyl siloxane materials (p>0.05). 5. There were no statistical differences between anterior-posterior and lateral dimensional changes of all impression materials (p>0.05).
Colloids
;
Elastomers*
;
Polyvinyls
;
Siloxanes
;
Stainless Steel
3.Antibiotic loaded Plaster of Paris as a Prevention of Experimental Osteomyelitis in Rats
Chang Ju LEE ; Won Ho CHO ; Sung Kee CHANG ; Ho Guen CHANG ; Jae Hong KIM
The Journal of the Korean Orthopaedic Association 1989;24(5):1479-1485
Plaster of Paris is an effective ancillary treatment in the surgery of infected cavities in bone. It is well tolerated and spontaneously absorbed over the period of weeks to months, being replaced by bone of normal architecture. When the antibiotics incorporated into plaster of Paris, the antibiotics are capable of prolonged local release in bactericidal concentrations. Therefore it is proposed that antibiotics loaded plaster of Paris might be a simple adjuvant technique after good surgical debridement for the treatment of bone infection. The authors carried out an experiment to study the effect of plaster of Paris containing antibiotics for a prevention of experimental osteomyelitis, using 45 rats, which were divided into 3 groups. In the Group 1, a defect was made at the proximal metaphysis of the tibia, inoculated by Staphylococcus aureus sensitive to Cephradine and Tobramycin and then filled with plaster of Paris pellet. In the Group 2, a defect was filled with Cephradine loaded plaster of Paris pellet. In the Group 3, a defect was filled with Tobramycin loaded plaster of Paris pellet. Then we observed the healing process of the bone defect in the point of view of the gross findings, radiologic findings and histologic findings at 4th, 8th and 12th week after operation. The results of this study were as follows:l. In the control Group;all 30 cases were infected. 2. In the Group 2;only 4 of 30 cases were infected. 3. In the Group 3;all 30 cases were not infected. 4. The plaster of Paris filled into the defect was absorbed continuously and stimulated the new bone formation.
Animals
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Anti-Bacterial Agents
;
Calcium Sulfate
;
Cephradine
;
Debridement
;
Osteogenesis
;
Osteomyelitis
;
Rats
;
Staphylococcus aureus
;
Tibia
;
Tobramycin
4.Antigen analysis of rickettsia typhi isolated in Korea: SDS-PAGE and immunoblotting characters.
Min Kee CHO ; Chang Soon YOON ; Yoon Won KIM ; Hee Sook KIM ; Chang Hong MIN
Journal of the Korean Society for Microbiology 1992;27(5):427-434
No abstract available.
Electrophoresis, Polyacrylamide Gel*
;
Immunoblotting*
;
Korea*
;
Rickettsia typhi*
;
Rickettsia*
5.Transplantation of newborn rat intestine without vascular anatomosis.
Doo Sun LEE ; Hong Moo KIM ; Hyun Chang KIM ; Kee Chun HONG ; Heung Gil PARK
Journal of the Korean Surgical Society 1993;45(3):299-306
No abstract available.
Animals
;
Humans
;
Infant, Newborn*
;
Intestines*
;
Rats*
6.Clinical Studies on Total Anomalous Pulmonary Venous Connection.
Young Jin HONG ; Kee Hong KWON ; Hae Il CHEONG ; Jung Yeun CHOI ; Yong Soo YOON ; Chang Yee HONG
Journal of the Korean Pediatric Society 1982;25(11):1120-1130
No abstract available.
7.A Case of Pemphigus Vulgaris Localized to the Oral Mucosa and Esophagus.
Hong Jin PARK ; Dong Won LEE ; Jun Young LEE ; Baik Kee CHO ; Chang Woo LEE
Korean Journal of Dermatology 1998;36(2):360-362
We recently encountered a case of pemphigus vulgaris, which was localized within the oral mucosa and esophagus. The patient was a 62-year-old women, who had had a few recurrent erosions on the oral mucosa for 1 year. Newly developed erythematous erosions on the esophagus appeared 7 days pre previously. Histopathological findings showed suprabasal blisters in the epithelium of the buccal and esophageal mucosa. On direct immunofluorescence, intercellular IgG and C3 bindings were found in the epithelium of the buccal mucosa. Treatment with oral steroids resulted in a remission of the lesions and the other skin lesions were not found for a period of 6 months.
Blister
;
Epithelium
;
Esophagus*
;
Female
;
Fluorescent Antibody Technique, Direct
;
Humans
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Immunoglobulin G
;
Middle Aged
;
Mouth Mucosa*
;
Mucous Membrane
;
Pemphigus*
;
Skin
;
Steroids
8.Urodynamic investigation after pelvic autonomic nerve preserving procedure for rectal cancer.
Seok Hwan LEE ; Kee Hyung LEE ; Choong YOON ; Don Ho HONG ; Sung Goo CHANG
Journal of the Korean Society of Coloproctology 1993;9(3):223-228
No abstract available.
Autonomic Pathways*
;
Rectal Neoplasms*
;
Urodynamics*
9.Dynamic MR Imaging in gastric Cancer: Comparison Between Precontrast and Postcontrast Images.
Sung Hwan HONG ; Joon Koo HAN ; Tae Kyung KIM ; Kee Hyun CHANG ; Byung Ihn CHOI
Journal of the Korean Society of Magnetic Resonance in Medicine 1997;1(1):130-134
PURPOSE: To analyze contrast-enhancement pattern of stomach cancer on dynamic MRI and to verify the efficacy of intravenous contrast agent in the evaluation of stomach cancer. MATERIALS AND METHODS: Twelve patients with proven stomach cancer underwent dynamic MRI, By using 1.0T scanner, we obtained precontrast FLASH images, and 30, 60, 90 second delay FLASH images after intravenous contrast injection. All patients ingested on liter of water and had intramuscluar injection of Buscopan just before MR study. For quantitative analysis we measured signal to noise ratio (S/N) of stomach cancer on each image, and signal difference to noise ratio (SD/N) between cancer and intraluminal fluid, cancer and the pancreas. For qualitative analysis two radiologists evaluated lesion conspicuity on each image by grading system(grade 0, 1, 2, 3: poor, fair, good, excellent). RESULTS: S/N of stomach cancer increased gradually by time(precontrast, 30, 60, 90 second delay:38.7, 42.5, 57.4, 65.7). SD/N between cancer and intraluminal fluid significantly increased after contrast enhancement(1.24, 25.01, 39.30, 45.89). SD/Ns between cancer and the pancreas were 10.5, 9.33, 9.99, 10.66 respectively. In qualitative analysis, precontrast images were better than postcontrast images for delineation of stomach cancer, Postcontrast images showed clear endo-luminal side of stomach cancer, but outer margin of stomach cancer was more distinct on precontrast images. CONCLUSION: Precontrast MR images are better than postcontrast MR images in the depiction of stomach cancer. Intravenous contrast agent is not imperative in the evaluation of stomach cancer.
Butylscopolammonium Bromide
;
Humans
;
Magnetic Resonance Imaging*
;
Noise
;
Pancreas
;
Signal-To-Noise Ratio
;
Stomach Neoplasms*
;
Water
10.Antihypertensive Effects and Safety of Lisinopril in Essential Hypertension.
Yeong Kee SHIN ; Tak Jong HONG ; Chang Hyoung MOON ; Seoung Yoon HWANG ; Bu Woung KIM
Korean Circulation Journal 1994;24(2):313-318
BACKGROUND: Antihypertensive effect and safety of the newer, long acting, nonsulfhydryl angiotensin converting enzyme inhibitor, lisinopril, were studied. METHODS: Twenty eight patients of mild to moderate essential hypertension were administered 10-20mg of lisinopril once daily for ten weeks. Patients were evaluated every two weeks concerning the changes of blood pressure and pulse rate in the sitting position and also any untoward sumptoms and signs attributable to the side effect. Chest X-rey, ECG and laboratory examination were performed in principle two times before and after the completion of medication. RESULTS: The blood pressure declined from 165.4/107.6mmHg to 141.3/92.4mmHg at the end of ten weeks of medication, thus the reduction of 24.1mmHg of systolic pressure and 15.2mmHg of diastolic pressure were observed and the overall effective rate was 85.7%. The pulse rate and laboratory findings were not sigificantly changed before and after the administration of lisinopril. The side effects were observed in 2 cases(7.1%) of mild dry cough and in 2 cases(7.1%) of transitory mild headache and in 1 case(3.6%) of dizziness but no one discontinued medication due to adverse effects. CONCLUSION: Lisinopril proved effective and safe in the treatment of mild to moderate essential hypertension.
Blood Pressure
;
Cough
;
Dizziness
;
Electrocardiography
;
Headache
;
Heart Rate
;
Humans
;
Hypertension*
;
Lisinopril*
;
Peptidyl-Dipeptidase A
;
Thorax