No abstract available.
Immunoglobulin M* ; Lymphoma* ; Paraproteinemias*

During the previous several decades the osseointegrated implants have been considered as the most ideal therapy for the fully edentulous or partially edentulous patients. Although the research on the biocompatibility of osseointegration, the oral tactile function, and the histo-neurologic study had been performed, the change of the oral tactile sensibility and maximal occlusal force according to the postinsertion time of implant prostheses has not been studied. The purpose of this study was to compare the oral tactile sensibility and maximal occlusal force of implant prostheses to natural teeth according to the specific postinsertion time intervals. The fifty seven patients treated with Br adegreenemark implants during the recent seven years were involved in this study. The oral tactile sensibility and maximal occlusal force were measured according to the postinsertion time (o6 months, o12 months, o18 months o24 months, and o25 months) 1.The passive tactile threshold of implants was higher than 6-7 times when comparing to natural teeth(P<0.05). 2.The absolute pressure threshold in horizontal and vertical direction for the passive tactile sensibility had decreased significantly in the post insertion time 13-18 months group and had increased significantly in the post insetion time over 25 months group (P<0.05). 3.50% limit thickness and 100% absolute thickness for the active tactile sensibility had decreased significantly in the postinsertion time 7-12 months group (AT50 : P<0.005, AT100: P<0.05) 4.The maximal occlusal force of the implants prostheses had decreased when comparing with natural teeth in the postinsertion time 1-6 months group(P<0.05) and after that there was no significant difference between the implant prostheses and natural teeth(P<0.05). 5.Maximal occlusal force according to the postinsertion time had increased significantly in the 13-18 months group (P<0.05),after that there was no significant difference. 6.There was positive correlation between age and oral tactile sensibility tested in horizontal and vertical direction (PH:r=0.39, PV:r=0.41) and there was no correlation between age and maximal occlusal force, age and active tactile sensibility 7.According to the results or the questionnaire, 76.6% of the patients were satisfied with the function and 96.7% of the patients were satisfied with the sensibility. In conclusion oral tactile sensibility and maximal occlusal force of implants have changed with the postinsertion time. Oral tactile function of implants was lower than that of the natural teeth, but for the maximal occlusal force there was no difference between implants and natural teeth.
Bite Force* ; Humans ; Osseointegration ; Prostheses and Implants ; Surveys and Questionnaires ; Tooth*

No abstract available.
Down Syndrome* ; Leukemia, Megakaryoblastic, Acute*

Intraventricular hemorrhage is a common hemorrhagic cerebral disorder in premature, but occurs much less frequently in the full-term newborn. In order to obtain documentation of clinical and ultrasonographic characteristics of intraventricular hemorrhage in full-term, we performed cerebral ultrasonography on 602 newborn infants who had been admitted to neonatal intensive care unit at the Deppartment of Pediatrics, Yonsei University College of Medicine between December 1989 and June 1991. 15 cases (2.5%) of intraventricular hemorrhage were analysed. The results were as follows: 1) Among 15 cases with intraventricular hemorrhage, there was no obstetrical and perinatal complication in 8 cases (53%) and 13 cases (87%) were neurologically normal at birth. 2) Sudden onset of dramatic neurologic abnormalitis inclued seizures, fever, bulging fontanel, irritability, lethargy, vomiting in cases (73%) and the remainder (27%) had no clinical symptoms and signs. 3) The age at diangosis of hemorrhage was before 72 hours in 5 cases (33%), between 4 and 7 days in 2 cases (13%), at 8 to 28 days in 8 cases (53%), 8 of 15 cases (53%) had Grade 1 IVH, four with Grade 2, cases with Grade 3, and 1 case of these infant demonstrated Grade IV IVH. The source of hemorrhage was subependymal germinal matrix in 12 cases (80%) and choroid plaxus in 3 cases (20%). 4) Precipitating factors were cerebral venous infarction in 7 cases, hypoxic injury in 5, and 3 other infants had no identifiable medical risk factors. 5) Among all 15 survivors, 2 of 3 infants with choroid plexus hemorrhage required placement of a ventriculo-peritoneal shunt, in the other case, ventriculomegaly decreased spontaneously.
Choroid ; Choroid Plexus ; Hemorrhage* ; Humans ; Infant ; Infant, Newborn* ; Infarction ; Intensive Care, Neonatal ; Lethargy ; Parturition ; Pediatrics ; Precipitating Factors ; Risk Factors ; Seizures, Febrile ; Survivors ; Ultrasonography ; Ventriculoperitoneal Shunt ; Vomiting

The purpose of this study was to compare surface roughness and bone formation around two types of threaded commercially pure titanium implants manufactured by two different companies. The test implants were manufactured by Sumin synthesis dental materials Co. (Avana, Busan, Korea), while the controls were manufactured by Nobel Biocare (MK II, Goteborg, Sweden). To compare bone formation adjacent to newly product with Branemark MK II implant, surface roughness was measured by Accurate 1500M and histomorphometric analysis was done. The results were as follows : 1. Measurement of surface roughness showed that Avana implant had a slightly more irregular surface compared with Branemark implant. 2. In the light microscopic studies, no infiltration of inflammatory cells nor the giant cells wee observed on both groups. 3. In th light and fluorescent microscopic studies, the amount of osseointegration and the extent and the timing of bone formation were similar. 4. There were no statistically difference between two groups in the average bone to implant contacts. Branemark implant ; 67%(SC 23%), Avana implant ; 70%(SD 16%). Comparing with Branemark implant, Avana implant made of CP grade II titanium showed similar good bone healing, formation and osseointegration.
Busan ; Dental Materials ; Giant Cells ; Osseointegration ; Osteogenesis ; Titanium*

A total of 110 computed tomographic scans of the brain in pediatric population were reviewed. They wereretrospectively analyzed focusing on the ventricular dilatation, widening of subdural space in frontal region andprominence of cerebral sulci in hemisphere. The results were compared with clinical recored. In the measurementbicaudate ventricular index waas above 0.18, which ws considered ventricular dilatation. The subdural space in thefrontal region and teh prominent cerbral sulci in the hemisphere were visualized among the cases aged over twoyears with clinical evidence of cerbral problem is pediatric population. The diagnostic application of CT to thecases of cerebral disorder in pediatric population is highly recommended.
Brain ; Dilatation ; Subdural Space

A case of transient neonatal diabetes mellitus combined with congenital adrenal hyperplasia(CAH) is described. A female infant was born by cesarean delivery due to fetal distress, she had sunken eyeball and anterior fontanelle, large protruded tongue and thin subcutaneous tissues. She had large clitoris and progressive pigmentation on whole body was observed since 10th day of birth. Hyperglycemia and glycosuria was noted at 3rd day of birth. Level of insulin and C-peptide was 3.0 mU/L and 0.35 ng/mL respectively. Serum ACTH was 870.4 pg/mL and 17-hydroxyprogesterone was increased to 20,000 ng/dL. Serum Na was 124 mEq/L, K 5.6 mEq/L. Abdominal MRI showed no abnormality. Chromosomal study showed 46,XX. Genetic analysis with polymorphic DNA markers for chromosome 6 showed paternal uniparental isodisomy at D6S276, D6S1704 and DNA analysis of CYP 21 gene showed mutation at P435S. She required insulin therapy for 8 months after birth. Hydrocortisone and florinef was needed for the control of CAH.
17-alpha-Hydroxyprogesterone ; Adrenal Hyperplasia, Congenital* ; Adrenocorticotropic Hormone ; C-Peptide ; Chromosomes, Human, Pair 6 ; Clitoris ; Cranial Fontanelles ; Diabetes Mellitus* ; DNA ; Female ; Fetal Distress ; Genetic Markers ; Glycosuria ; Humans ; Hydrocortisone ; Hyperglycemia ; Infant ; Insulin ; Magnetic Resonance Imaging ; Parturition ; Pigmentation ; Subcutaneous Tissue ; Tongue ; Uniparental Disomy

Hematuria is a important clinical sign that is a consequence of significant fenal. urologic or sytemic disease. Recently the morphology of the red cell in hematuria has been used to indicate a renal or non-renal source and also the measurement of red cell volume by red cell analyzer has been used to distinguish glomerular from non-glomerular hematuria. In this study. the MCV(mean corpsular red cell voume). RDW(red cell distribution width) and HDW (hemoglobin distribution width) were measured using H-1 system in57 children with hematuria to assess the diagnostic usefulness of the urinary red cell analyzer in the differentation of glomerular and non-glomerular hematuria. The patients were divided into two groups as glomerular diseases(40cases)and non-glomerular diseases(17 cases)and the location of the bleeding was confirmed by renal biopsy, radiology and the clinical findings. The results were as follows. 1) The urinary red cell MCV waslower in patients with glomerular diseases than that in patients with non-glomerular diseases (79.89 +/- 12.0fl vs. 90.93 +/- 9.71fl vs. 90.93+/-9.71 fL; p<0.01) 2) The urinary RDW and HDW were significantly higher in glomerular diseases than those in non-glomerular diseases (RDW; 19.86 +/- 11.28% vs 11.34+/-5.88%, HDW; 3.37+/-2.07 gm vs. 1.86+/-1.43gm). 3) The urinary red cell MCV was correlated well with the RDW and HDW while there was no correlation between the urinary red cell MCV and the urinary SG or pH. 4) The sensitivity, specificity and positive predictability of the urinsary MCV were 37.8%, 94.1% and 93.7% and those of RDW were 62.5%, 82.3% and 89.2% 5) The sensitivity, specificity and positive predictability of the urinary HDW were 42.5%, 88.2% and 89.4% We concluded from above date that the measurment of the urinary MCV, RDW and HDW would be useful as a primary non-invasive screening test in differentation of glomerular and non-glomerular hematuria in children.
Biopsy ; Cell Size* ; Child* ; Diagnosis* ; Hematuria* ; Hemorrhage ; Humans ; Hydrogen-Ion Concentration ; Mass Screening ; Sensitivity and Specificity

No abstract available.
Blood Platelets*

PURPOSE: This study was undertaken to obtain basic data about the megakaryocyte colony formation of fetal liver cells by using immunocytochemical staining and ex vivo culture with growth factors. METHODS: The mononuclear cells were isolated from fetal liver and bone marrow with idiopathic thrombocytopenic purpura(ITP) and pancytopenia. These mononuclear cells were cultured in MegaCultTM-C(Stem Cell Tech, Canada) media in the presence of growth factors and CFU-Megakaryocyte(CFU-Mk) colonies were counted on day 12. The expansion of CD34+ and CD41+ cell was analyzed by flow cytometry after 5 days incubation using flask culture. RESULTS: The numbers of CFU-Mk colonies of mononuclear cells obtained from fetal liver in the 11th week gestational age were more than those in the 19th week specimens; growth factors could not enhance the colony expansion in all cases. Total numbers of CFU-Mk colony of fetal liver cells were higher than bone marrow from ITP or pancytopenia groups. The numbers of pure or large CFU-Mk colonies of fetal liver cells were also higher than bone marrow specimens. The rate of CD34+ cell expression of fetal liver was increased after flask culture and the enhancement effect of epression was seen only in cases which added thrombopoietin. The rate of CD41+ cell expression of fetal liver was increased after incubation, but the enhancement effect of growth factors was unclear. CONCLUSION: This study revealed good results about the megakaryocyte colony assay of fetal liver mononuclear cells using MegaCultTM-C media. This study suggests that the fetal liver could be a good source of megakaryocytic progenitor cells for clinical application in hematopoietic stem cell transplantation.
Bone Marrow ; Flow Cytometry ; Gestational Age ; Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells ; Intercellular Signaling Peptides and Proteins ; Liver* ; Megakaryocytes* ; Pancytopenia ; Stem Cells ; Thrombopoietin