Twenty cases of the rheumatoid arthritis was carried out the histopathological observation from the affected synovial membrane at the knee joint by the Cops biopsy needle, at the Department of Orthopedic Surgery, Chosun University Hospital. The authors researched the difference to compare with the histological finding and its clinical features. The following results were obtained. 1. The average age was 36.9 years old and the sex ratio between the male and female was 1:2.7. 2. The erythrocyte sedimentation rate and protein amont in the synovial fluid was elevated than the normal value. 3. The most common clinical sign was the morning stiffness with multiple joint pain and moderate swelling, tenderess in the involved joint. 4. The test of rheumatoid factors revealed positive about 70% in the serum and 100% in the joint fluid. 5. The characteristic histological finding on the light microscopical examination was the hyperplasia of surface lining cells, deposition of the fibrin with the fibrinoid necrosis, and vascular hypertrophic changes of the blood vessel in all of those cases. 6. The histological finding had no difference to compare with the clinical course.
Arthralgia ; Arthritis, Rheumatoid ; Biopsy ; Blood Sedimentation ; Blood Vessels ; Female ; Fibrin ; Humans ; Hyperplasia ; Joints ; Knee Joint ; Knee ; Male ; Necrosis ; Needles ; Orthopedics ; Reference Values ; Rheumatoid Factor ; Sex Ratio ; Synovial Fluid ; Synovial Membrane

The purpose of this study was to investigate the causes of food impaction and to explore solutions as well. For this study, 39 patients with food impaction wee selected. 77 contact areas in these patients were investigated mobility, tightness of contact area, gingival index, plaque index, attachment loss, alveolar bone loss, proximal caries, marginal ridge distance and occlusal relationships. The results were as follows ; 1. Teeth without distal support were found to be the most frequent site of food impaction (41.6%). Food impaction was found to be more frequent in the upper teeth (66.2%) than the lower teeth (33.8%). 2. Food impaction was found in tight contact cases (71.4%). Alveolar bone loss was not found in the early stage of food impaction (83.1%) 3. The distance between the marginal ridges of food impaction sites (mean=0.48mm) was shorter than that of the control group. (mean=0.77mm) (p<0.001) 4. In 18.2% of t he cases, proximal carries were found at the food impaction site. 5. Food impaction affected patient's occlusion with the following frequencies ; cusp to marginal ridge relationship (72.7%), cusp to fossa relationship (3.9%) and stepped relationship (23.4%).
Alveolar Bone Loss ; Humans ; Periodontal Index ; Tooth

PURPOSE: The purpose of this study was to compare mammography and breast sonography in detection of breast cancer and to suggest reasonable guideline of breast imaging in breast cancer patients under 30 years of age in whom breast cancer shows different clinicopathologic characteristics compared with breast cancer in older women. MATERIALS AND METHODS: A. uthors reviewed medical records of 27 patients under 30 years of age with pathologically-proven breast cancer. Age, family history, physical examination findings, indications for breast s0nography were reviewed. Cases in whom breast cancer lesion is detectable and cases in whom not detectable using mammography or breast sonography were reviewed. And then, authors evaluated the usefulness of each method and reasons for nonvisualization of lesion on mammography. RESULTS: Among 27 patients, 25 patients had palpable breast mass as indication of mammography and breast sonography. Cancer lesions were detectable in 16 of 25 patients (64%) on mammography and 24 of 25 patients (96%) on breast ultrasonography. Reasons for nonvisualization of cancer lesions on mammography were dense breast with nodular parenchyma pattern and minimal breast change of ductal carcinoma in situ. CONCLUSION: In breast cancer patients under 30 years of age who have palpable breast mass as a initiaJ, and main clinical problem, breast ultrasonography is superior to mammography in detecting and diagnosing breast cancer. We suggest that guidelines can avoid unnecessary mammography in these patients.
Breast Neoplasms* ; Breast* ; Carcinoma, Intraductal, Noninfiltrating ; Female ; Humans ; Mammography ; Medical Records ; Physical Examination ; Ultrasonography* ; Ultrasonography, Mammary

PURPOSE: The purpose of this study was to compare mammography and breast sonography in detection of breast cancer and to suggest reasonable guideline of breast imaging in breast cancer patients under 30 years of age in whom breast cancer shows different clinicopathologic characteristics compared with breast cancer in older women. MATERIALS AND METHODS: A. uthors reviewed medical records of 27 patients under 30 years of age with pathologically-proven breast cancer. Age, family history, physical examination findings, indications for breast s0nography were reviewed. Cases in whom breast cancer lesion is detectable and cases in whom not detectable using mammography or breast sonography were reviewed. And then, authors evaluated the usefulness of each method and reasons for nonvisualization of lesion on mammography. RESULTS: Among 27 patients, 25 patients had palpable breast mass as indication of mammography and breast sonography. Cancer lesions were detectable in 16 of 25 patients (64%) on mammography and 24 of 25 patients (96%) on breast ultrasonography. Reasons for nonvisualization of cancer lesions on mammography were dense breast with nodular parenchyma pattern and minimal breast change of ductal carcinoma in situ. CONCLUSION: In breast cancer patients under 30 years of age who have palpable breast mass as a initiaJ, and main clinical problem, breast ultrasonography is superior to mammography in detecting and diagnosing breast cancer. We suggest that guidelines can avoid unnecessary mammography in these patients.
Breast Neoplasms* ; Breast* ; Carcinoma, Intraductal, Noninfiltrating ; Female ; Humans ; Mammography ; Medical Records ; Physical Examination ; Ultrasonography* ; Ultrasonography, Mammary

No abstract available.
Denture, Partial, Fixed*

No abstract available in English.
Plasmacytoma

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

The purpose of this study was to compare the fracture strength of the IPS Empress ceramic crown according to the occlusal depth (1.5mm, 2.0mm, 2.5mm) and axial inclination (4degree, 8degree, 12degree) of the upper first premolar. After 10 metal dies were made for each group, the IPS Empress ceramic crowns were fabricated and each crown was cemented on each metal die with resin cement. The cemented crowns mounted on the testing jig were inclined 30 degrees and a universal testing machine was used to measure the fracture strength. The results were : 1. The fracture strength of the ceramic crown with 2.5mm depth and 12degreeinclination was the highest (630N). Crowns of 1.5mm depth and 4degreeinclination had the lowest strength(378N). There were no significant differences of the fracture strength by axial inclination in same occlusal depth group. 2. The fracture mode of the crowns was similar. Most of fracture lines began at the loading area and extended through proximal surface perpendicular to the margin, irrespective of occlusal depth.
Bicuspid* ; Ceramics ; Crowns* ; Resin Cements

118 Cases of open tibia fractures treated in Chosun university Hospital were survayed and evaluated. Results: 1. The cases are predominantly male(80%) and most often in their 4th decade. 2. They were very often comminuted(44%) 3. Treatments consists of debridement with or without initial internal(plate and screws) or external (Hoffmann's device) fixations. The end results seems to be better in cases with initial fixations of bone(internal or external)than those treated with initial debridement and plaster cast immobilization only and osteosynthesis later.
Casts, Surgical ; Clinical Study ; Debridement ; Fractures, Open ; Immobilization ; Tibia

Dysplasia epiphysialis punctata is a rare congenital disorder of infancy affecting in particular cartilage, muscle, jointtcapsules and the eyes. A case of dysplasia epiphysialis punctata with involvement of all epiphyses of extremities, spine and pelvis in 2 days old male is to be reported with review of literature.
Cartilage ; Chondrodysplasia Punctata ; Congenital, Hereditary, and Neonatal Diseases and Abnormalities ; Epiphyses ; Extremities ; Humans ; Male ; Pelvis ; Spine