Statement of problem. Relatively low success rate of root analogue implant system was supposed to be due to the time duration between extraction and implant installation. The use of three-dimensional computer tomography and the reconstruction of objects using rapid prototyping methods would be helpful to shorten this time. Purpose. This aim of this study was to evaluate the application possibility of the 3-dimensional computer tomography and the rapid prototyping to root analogue implants. Material and methods. Ten single rooted teeth were prepared. Width and height of the teeth were measured by the marking points. This was followed by CT scanning, data conversion and rapid prototyping model fabrication. 2 methods were used; fused deposition modelling and stereolithography. Same width and height of this models were measured and compared to the original tooth. Results. Fused deposition modeling showed an enlarged width and reduced height. The stereolithography showed more exact data compared with the fused deposition modelling. Smaller standard deviation were recorded in the stereolithographic method. Overall width error from tooth to rapid prototyping was 7.15% in fused depostion modelling and 0.2% in stereolithography. Overall height showed the tendency of reducing dimensions. Conclusion. From the results of this study, stereolithography seems to be very predictable method of fabricating root analogue implant.
Tomography, X-Ray Computed ; Tooth

It awakens interest that the frequency of carcinoma of the uterine cervix is the highest among the carcinomas among the Korean women, althouth it is not so high among Westerns. It is admitted that the exfolicative cytologic technique is useful not only as a screening test for early detection of cervical cancer and its precursor lesions but also as a tool for follow-up, because it is accurate, economical, and easy to perform. But it remains to be solved that the false negativity of the cytologic diagnosis is relatively high. Five hundred and sevently two cases of cytology specimens, confirmed by either colposcopic biopsy or cone biopsy, were studied among 15,844 cases which were submitted to the Department of Pathology, Chonnam University Hospital between October of 1982 and August of 1986. The results obtained were as follows. 1) The accuracy of the cytologic diagnosis was 69.9%, the false nagativity, 19.4% and the false positivity, 6.6%. 2) Among the causes of discrepancies between cytologic diagnosis and histologic diagnosis, error in cytology reading was the most frequent (57%), error in cell collection was the second frequent (43.7%), and error in biopsy location was the least frequent (5.3%). 3) Among the 38 cases of false positive diagnosis, the percentage of error in cytology reading was 82.3%, and that of error in biopsy location was 20.7%. Among the 105 cases of false negative diagnosis, the percentage of error in cytology reading was 50.5%, and the percentage of error in cell collection was 56.6%.
Female ; Humans ; Biopsy

No abstract available.
Thyroid Dysgenesis*

Many previously described nuclear medicine procedures to assess glomerular filtration rate have some problems because numerous blood sample is to be taken and they don't measure each separate renal function. Gates described isotopic method for the measurement of global and unilateral GFR based on the fractional renal uptake of (99m)Tc-DTPA 2 to 3 minutes after its intravenous injection. We evaluated GFR using (99m)Tc-DTPA in 57 people according to Gates method and compared with creatinine clearance. A good correlation was observed between creatinine clearance and GRF calculated by Gates' formula with an r value of 0.9(P<0.05). And also the relationship between parameters of (99m)Tc-DTPA renal scan images and GFR was taken. They were significantly correlated with GFR calculated by Gates' formula : r value 0.66 between relative intensity of peak renal to peak aortic activity(pK/pA) and GFR, -0.42 between time between aortic and kidney peak(A-K) and GFR and -0.48 between parenchymal renal activity at 25 min compared to peak kidney activity(25K/pK) and GRF. In conclusion, the determination of GFR according to Gates' formula shows good and reproducible of GRF with rapidity and simplicity. And the parameters from the renal scan images can use to estimate the renal function.
Creatinine ; Filtration* ; Glomerular Filtration Rate ; Injections, Intravenous ; Kidney ; Methods ; Nuclear Medicine

A 24 year-old Korean male, has had an eruption on the Lt. foot for 3 years. The lesion consists of single large macule of reddish purplish brown coloration scattered over the great toe, dorsum and inner part of the Lt. foot. Recently, there is no new lesions and lymphadenopathy on any part of the body. Laboratory tests were all negative, including serology. X-ray findings of the chest and Lt. foot showed normal limits but, angiographic findings which was performed under the local anesthesia through the femoral artery showed the arterio-venous plexus and markedly increased vascularity on the inner side of Lt foot area. Biopsy of a macule on the inner part of the Lt. foot was confirmed as Kaposi's sarcoma. X-ray therapy (100Kv at 50cm distance with 2 mm of AL. filter) was directed to the involved sites daily for 6 days to a total of 1,800 roentogens, after lesion was progressively improved day by day.
Anesthesia, Local ; Biopsy ; Femoral Artery ; Foot ; Humans ; Lymphatic Diseases ; Male ; Sarcoma, Kaposi* ; Thorax ; Toes ; X-Ray Therapy ; Young Adult

No abstract available.
Adenoids* ; Carcinoma, Adenoid Cystic* ; Trachea*

No abstract available.
Takayasu Arteritis*

As the incidence of acute myocardial infarction been increasing with prolongation of life spans, improvement in foods and life styles in Korea, rapid diagnosis and treatment is critical in survival of acute myocardial infarction patient. Most of the acute myocardial infarction result from atherosclerotic plaque forming thrombus and occlusion of coronary artery. Because early thrombolytic therapy is important to maintain the left ventricular function and survival rate, there have been many trials to reperfuse the occluded coronary artery. We have studied the many aspects of acute myocardial infarction such as sex, age, infarction site, chief complaints, change of ECG, change of serum enzyme, time delay on emergency room arrival, and compared the effectiveness of thrombolytic therapy. Total number of patient was 212, and males were 141(66.5%) and females were 71(33.5%). The most common infarction site was ant, fuel wall(102 cases,48%)of the heart and the most common chief complaint was chest pain(204 cases,97%). Among the 106 patients who received thrombolytic therapy, 101 patients(95%) had survived and 5 patients(5%) had died. Among the 64 patients who didn't receive thrombolytic therapy, 56 patients (87.5%) were alived and 8 patients(12.5%) were dead.
Ants ; Coronary Vessels ; Diagnosis* ; Electrocardiography ; Emergency Service, Hospital ; Female ; Heart ; Humans ; Incidence ; Infarction ; Korea ; Life Style ; Life Support Care ; Male ; Myocardial Infarction* ; Plaque, Atherosclerotic ; Survival Rate ; Thorax ; Thrombolytic Therapy ; Thrombosis ; Ventricular Function, Left

We have experienced a case of 13 ring chromosome in a 40-month-old girl who demonstrated psychomotor retardation with delayed speech, growth retardation, hearing loss(left), microcephaly, trigonocephaly with flat occiput, hypertelorism, epicanthal folds, microophthalmia, broad prominamt nasal bridge, high arched palate, micrognathia, large auricles and other anomalies. Cytogenetic studies of peripheral blood lymphocytes with differential staining of chromosomes revealed 46, XX, r13. Her parents' karyotypes were normal. We reported the case with the review of the associated literatures.
Child, Preschool ; Craniosynostoses ; Cytogenetics ; Female ; Hearing ; Humans ; Hypertelorism ; Karyotype ; Lymphocytes ; Microcephaly ; Palate ; Ring Chromosomes*

STUDY DESIGNS: A retrospective study. OBJECTIVES: To analyze the clinical and radiological outcomes of spontaneous reduction via minimally invasive transforaminal lumbar interbody fusion (Mini-TLIF) as the treatment for low-grade symptomatic spondylolisthesis. SUMMARY OF LITERATURE REVIEW: Although minimally invasive transforaminal lumbar interbody fusion is technically demanding, this procedure is an effective method for spontaneous reduction of low grade spondylolisthesis. MATERIALS AND METHODS: We analyzed consecutive series of 41 patients with low grade spondylolisthesis who underwent minimally invasive transforaminal lumbar interbody fusion, between April 2008 and July 2009. The minimum follow-up period was 2 years. Clinical evaluation was performed by an analysis of Visual Analogue Scale and Oswestry Disability Index. For the radiological evaluation, disc space height, slip percentage, and slip angle were analyzed. At the final follow-up, the fusion rate was analyzed according to the Bridwell's anterior fusion grade. RESULTS: For the evaluation of clinical outcomes, the Visual Analogue Scale for back pain decreased from 6.8+/-1.2 to 2.0+/-1.1, and that for radiating pain decreased from 7.9+/-1.3 to 1.7+/-1.1. Oswetry Disability Index decreased from 38.5+/-8.4 to 13.4+/-6.1. For the radiological evaluation, disc space height increased from 8.4+/-2.14mm to 11.8+/-1.54mm(P<0.05), slip percentage was reduced from 18.4+/-5.1% to 13.3+/-3.1%(P<0.05) and slip angle decreased from 10.6+/-4.5degrees to 6.2+/-3.4degrees (P<0.05). At the final follow-up, radiological union was obtained in 38 cases (92.7%). CONCLUSIONS: We conclude that minimally invasive transforaminal lumbar interbody fusion appears to be an effective method for spontaneous reduction of low grade spondylolisthesis if the surgeon becomes familiar with this method.
Back Pain ; Follow-Up Studies ; Humans ; Retrospective Studies ; Spondylolisthesis