No abstract available.
Crowns* ; Dental Cements*

No abstract available.
Crowns*

Ninety cases of meniscus injury were treated by arthroscopic meniscetomy between March, 1988 and March, 1992. Eighty four cases were treated by arthroscopic partial, 5 cases by subtotal, and 1 case by total meniscectomy. All cases were followed up for more than 1 year. The results were as follows. 1. The ratio of male to female was 57 to 31, and that of right to left was 52 to 38. 2. There were 41 cases of medial meniscus and 49 cases of lateral meniscus. Longitudinal tears were 35 cases (39%), oblique tears were 20 cases (22%), horizontal tears were 15 cases (17%), and radial tears were 9 cases (10%). There was no difference in the shape of tear between medial and lateral meniscus. 4. The most common associated injury was anterior cruciate ligament tear. 5. The Tapper and Hoover scale was used to record the clinical results, and satisfatory results (exellent and good)were in 86% of cases.
Anterior Cruciate Ligament ; Clinical Study ; Female ; Humans ; Knee ; Male ; Menisci, Tibial ; Tears

Although cadmium is a well known heavy metal which has an influence testis and brings about male infertility, the mechanism of action in the testis is still fully unknown. In these experiment, cadmium chloride 4 mg/kg of body weight administered intraperitoneally to the rat (Sprague-Dawley) and sacrificed after 1 week, and morphological changes were observed by LM and TEM. In addition, electrophoresis, immunoprecipitation and Western blotting and N-terminal analysis performed to reveal the protein changes. 1. Major findings under light microscope were hemorrhagic necrosis and death of all the spermatogenic cells and supporting cells within the seminiferous tubules, and decreased volume of ECM, many apoptotic bodies, and death of interstitial cells and fibroblasts within interstitium. 2. The EM findings were disruption of nuclear membrane and disappearance of cell organelles of spermatogenic cells and supporting cells within seminiferous tubules, and decreased filopodia, increased inclusion bodies, vacuolation and apoptotic changes of the interstitial cells and fibroblastic cells, many short electron-dense collagen fibers in the extracellular matrix of interstitium. 3. Two proteins of molecular weight 42 kDa and 21 kDa which disappeared after cadmium treatment were rat collagen type I alpha 2. According to the above results, it is considered that cadmium degrades the collagen of the wall of small blood vessels within seminiferous tubules and interstitium and disrupts vascular walls, which results hemorrhagic necrosis, death of all the spermatogenic cells, and the death of interstitial cells and fibroblastic cells.
Animals ; Blood Vessels ; Blotting, Western ; Body Weight ; Cadmium Chloride* ; Cadmium* ; Collagen ; Collagen Type I ; Electrophoresis ; Extracellular Matrix ; Fibroblasts ; Immunoprecipitation ; Inclusion Bodies ; Infertility, Male ; Male ; Molecular Weight ; Necrosis ; Nuclear Envelope ; Organelles ; Pseudopodia ; Rats* ; Seminiferous Tubules ; Testis*

PURPOSE: Epstein-Barr virus(EBV) exists in the human population in two genetic forms, usually referred to as type 1 and type 2 which have been defined on the basis of sequence divergence in the EBNA-2 and EBNA-3 family genes. In this study, we were intended to investigate whether the subtypes of EBV in malignant lymphoma in Korea were associated with specific disease entities and geographical distribution. MATERIALS AND METHODS: Biopsy samples obtained from 18 Korean patients with malignant lymphoma including Hodgkin's disease(3 cases), B cell lymphoma(1 case), and NK/T cell lymphoma(14 cases) were analyzed to determine the subtype of EBV infected therein. DNA was extracted from formalin-fixed, paraffin-embeded tissues by ordinary method and specific viral sequences were sought using the polymerase chain reaction(PCR) and Southern blot hybridization assay. Oligonucleotide primers used for examination of EBV strain type were derived from the EBNA-3B and EBNA-3C coding regions. As a control, four cases of reactive hyperplasia were analyzed. RESULTS: The two of four reactive hyperplasia cases were associated with type 1 and the rest of two cases with both types. Among the 18 cases with malignant lymphoma, thirteen cases(72%) had type 1, one(6%) had type 2, and four(22%) had dual infections with both types. In case of NK/T cell lymphoma(14 cases) occupying 78% of 18 biopsy samples, 86%(12 cases) were associated with type 1, 7%(1 case) with type 2, and 7%(1 case) with both types. In case of Hodgkin's disease, all of three cases had both types. B cell lymphoma taking only one case of twenty two cases was determined as type 1. CONCLUSION: These observations indicated that type 1 EBV was predominant in Korean patients with malignant lymphoma, especially NK/T cell lymphoma and showed high frequency of dual viral infections(22%) in Hodgkin's disease as well as in reactive hyperplasia.
Biopsy ; Blotting, Southern ; Clinical Coding ; DNA ; DNA Primers ; Genotype ; Herpesvirus 4, Human ; Hodgkin Disease ; Humans ; Hyperplasia ; Korea* ; Lymphoma* ; Lymphoma, B-Cell

In the case of a soft tissue defect which requires thin & pliable tissues, the choice of donor site is limited due to flap bulkiness and donor site morbidity. To overcome these problems, a variety of perforator-based flaps such as paraspinous and parasacral perforator flap, deep inferior epigastric perforator flap, gluteal perforator flap, and thoracodorsal artery perforator flap have recently been introduced. We experienced 8 cases of soft tissue defects from December 1996 to March 1999 using the thoracodorsal artery perforator flap for reconstruction. We could elevate the cutaneous flap with preservation of the latissimus dorsi muscle flap only when it was based on one cutaneous perforator. Defatting procedure was possible for further thinning of skin flap. In one case, axillary defect after release of postburn scar contracture was repaired with island perforator flap and the other seven cases were repaired with free flap. The results were satisfactory. We believe the thoracodorsal artery perforator flap is useful for reconstruction of soft tissue defects which are large or under conditions requiring thin flap.
Arteries* ; Cicatrix ; Contracture ; Free Tissue Flaps ; Humans ; Perforator Flap ; Skin* ; Superficial Back Muscles ; Tissue Donors

Purpose: this study was to evaluate the fitness of adjustable dental impression trays on the Koreans : the trays used in the previous study by Kim et al. as part of the dental adjustable tray development project were improved and modified. Material and method: The patterns of tray were made through CAD-CAM process, and a simple silicone-base molds were made from them. The trial products were reproduced by pouring polyurethane into these molds. 30 male students(Wonkwang University, Dental College) and 30 female students (Wonkwang Health Science College, Department of Dental Hygiene) were selected and Reversible hydrocolloid impression materials were used for this study. The fitness of the trays was evaluated by measuring the width and length of impression materials of each measurement sites. Results and conclusion: 1. In adapting the trays inside the mouth, a uniform width of impression material(3.6mm) was obtained in most sites due to the tooth stops and the inclined planes accommodating the width of the tray. 2. The thickness of impression material in the central part of the palate was a mean 9.8 mm, which turned out to be somewhat thick. 3. In the mandible, the thickness of the impression material in the lingual side inferior to the contact point of the 1st and 2nd molars was 2.7mm, and the thickness of the material in the lingual side of the rearmost margin was 2.5 mm. The thickness of the impression material of these areas was relatively thin.
Colloids ; Computer-Aided Design ; Female ; Fungi ; Humans ; Male ; Mandible ; Molar ; Mouth ; Palate ; Polyurethanes ; Tooth

Thyroglossal duct cysts result from failure to obliterate the embryonic throglossal duct. When these cysts drain through the skin, they produce thyroglossal duct fistulas, which re often infected. We report two cases of thyroglossal duct fistula in an 8-year-old boaid a 41-year-old man who had a infected cystic mass and sirius on the anterior midline neck, respeticely. The cyst which is lined by a columnar epithelium was identified microscopically in a surgically n se ted specimen.
Adult ; Child ; Epithelium ; Fistula* ; Humans ; Neck ; Skin ; Thyroglossal Cyst

No abstract available.
Leptospira interrogans* ; Leptospira*

Background: Although electroencephalography is known as non-invasive, long-term electroencephalography monitoring has a significant risk of pressure ulcers caused by electrodes. We investigated the incidence and risk factors of pressure ulcers in long-term electroencephalography monitoring for more than 24 hours. Methods: All patients who underwent long-term electroencephalography monitoring for more than 24 hours from January 2020 to December 2021 were reviewed. Their medical records were reviewed to evaluate the risk factors for pressure ulcers by electroencephalography electrodes. All patients were divided into the presence (lesion positive) and absence (lesion negative) of pressure ulcers confirmed by a clinician. Results: A total of 541 patients were analyzed in this study. Their mean age was 56.0±21.5, and the average duration of the long-term electroencephalography monitoring was 118.0±68.6 hours. Pressure ulcers were identified in 49 patients (9.1%). The odds ratios of age and recording time were 1.032 (95% confidence interval [CI], 1.008-1.056, p=0.009) and 1.022 (95% CI, 1.015-1.029, p<0.001), respectively. The odds ratio of pressure ulcer was 2.702 (95% CI, 1.461-4.999, p=0.002) in patients with comatose mentality (1 point for eye response of Glasgow coma scale). Conclusions The pressure ulcers caused by electrodes in long-term electroencephalography monitoring can be preventable with due diligence in clinical settings. Risk factor control to prevent pressure ulcers due to electroencephalography electrodes is needed.