No abstract available.
Child* ; Humans

PURPOSE: To characterize the MR findings of hypoxic-ischemic brain injury and to assess the value of the MR imaging. MATERIALS AND METHODS: SE T1 -, T2-weighted, and IR brain MR images of 44 infants and children with the past history of perinatal hypoxic insults were reviewed. Abnormal brain MR findings of 8 patients with birth history of prematurity and 36 patients with birth history of full-term/posterm including 7 with severe anoxic insult history, were compared in regard to the location and the character of the lesions RESULTS: MRI demonstrated the followings;(1)abnormal signal intensity lesions of subcortical and/or deep cerebral white matter, cortex, and deep gray matter, (2)atrophy of the cerebral white matter, cortex and corpus callosum, with/without ventriculomegaly, and (3)delay in myelination. Periventricular and deep white matter lesions were demonstrated in the prematurity, the deep white matter lesions and/or subcortical white matter lesions in the term/post-term, and deep gray matter lesions in the 7 patients with severe anoxic insults history. CONCLUSION: MR imaging was useful in the diagnosis of the hypoxic-ischemic brain injury, and the white and gray matter lesions were correlated with the time of the injury and the severity of hypoxic insult.
Brain Injuries* ; Brain* ; Child ; Corpus Callosum ; Diagnosis ; Humans ; Infant ; Magnetic Resonance Imaging ; Myelin Sheath ; Reproductive History

No abstract available.
Endoscopy ; Gastrointestinal Hemorrhage*

No abstract available.
Groin* ; Vulvar Neoplasms*

No abstract available.
Hemoglobin A* ; Humans ; Mothers* ; Postpartum Period*

PURPOSE: To propose a standard value for the maxillary sinus volume of a normal Korean adult by measuring the width and height of the sinus and analyzing their correlation and the difference of the sinus size respectively between sexes, and on the right and left sides. MATERIALS AND METHODS: Fifty-two(95 maxillary sinuses) out of 20 years or over aged patients who had taken CT in the Department of Dental Radiology, Yonsei University, Dental Hospital, between February 1997 and July 1999 who were no specific symptom, prominent bony septa, pathosis, clinical asymmetry and history of surgery in the maxillary sinus were retrospectively analyzed. RESULTS: The mean transverse width, antero-posterior width, height and volume of the normal Korean adult's maxillary sinuses were 28.33 mm, 39.69 mm, 46.60 mm and 21.90 cm3, respectively. There was a significant sex difference in the sinus volume(p<0.05). In the mean antero-posterior width, height and volume of the sinus, no significant difference was observed between both sides. All four measurements showed a significant correlation between both sides(p<0.0001). The widths and height of the sinus all showed a significant correlation with the sinus volume(p<0.0001). CONCLUSION: In the Korean normal adult's maxillary sinus, males tended to be larger than females. Except for the transverse width, all of the measurements showed no significant difference between the right and left side, but significant correlations in the four measurements between both sides were observed. Thus, the overgrowth or undergrowth in the unilateral maxillary sinus may suggest a certain pathosis or developmental abnormalities in the maxillary sinus.
Adult ; Female ; Humans ; Male ; Maxillary Sinus* ; Retrospective Studies ; Sex Characteristics

Angioedma is a group of disorders with multifactorial etiology but a similar clinical expression, is characterized by swelling of subcutaneous or submucosal tissue. Systemic lupus erythematosus(SLE) is a chronic multi-systemtic disease characterized by inflammation and tissue damage resulting from deposition of auto-antibodies and immune complex. We experienced a case of angioedema which was the first manifestation of SLE in 24-year-old female patient. She had suffered from severe facial edema and multiple lymphadenopathy for six months and she also had pleural effusion, positive anti-nuclear and anti-DNA antibody test. Marked decrease of C3 and C4 levels was noted with normal antigenic level, and activity of Cl esterase inhibitor. The angioedema was not improved with anti-hitamine agents and instead disappeared with use of corticosteroid and non-steroidal anti-inflammatory drugs. Complement levels normalized after corticosteroid treament. We report a case of SLE which initial manifestation was angioedema.
Angioedema ; Antigen-Antibody Complex ; Complement System Proteins ; Edema ; Female ; Humans ; Inflammation ; Lupus Erythematosus, Systemic* ; Lymphatic Diseases ; Pleural Effusion ; Young Adult

No abstract available.

For the successful endodontic treatment, root canal should be cleaned thoroughly by accurate mechanical and chemical canal preparation and sealed completely with canal filling material without damaging the periapical tissues. The accuracy of the root canal length measurement is a prerequisite for the success of the endodontic treatment, and the root canal length is often determined by the standard periapical radiographs and digital tactile sense. In this study, the accuracy and the clinical usefulness of Digora(R), an intraoral digital imaging processor and the conventional standard radiographs were compared by measuring the length from the top of the file to the root apex. 30 single rooted premolars were invested in a uniformly sized blocks and No.25 K-file was inserted into and fixed in each canal. Each block was placed in equal distance and position to satisfy the principle of the bisecting angle and paralleling techniques and Digora(R) system's image and standard periapical radiographs were taken. Each radiograph was examined by 3 different observers by measuring the length from top of the file to the root apex and each data was compared and analyzed. The results were as follows; 1. In the bisecting angle technique, the average difference between the Digora(R) system and standard periapical radiograph was 0.002 mmand the standard deviation was 0.341 mmwhich showed no statistically significant difference between the two systems(p>0.05). Also, in the paralleling technique, the average difference between these two system was 0.007 mmand the standard deviation was 0.323 mmwhich showed no statistically significant difference between the two systems(p>0.05). 2. In Digora(R) system, the average difference between the bisecting angle and paralleling technique was -0.336 mmand the standard deviation was 0.472 mmwhich showed a statistically significant difference between the two techniques(p<0.05). also> 3. In Digora(R) system and the standard periapical radiographs, there was a statistically significant difference between the measurement using the bisecting angle technique and the actual length(p<0.05). but there was no statistically significant difference between the measurement using the paralleling technique and the actual length>0.05). In conclusion, the determination of the root canal length by using the Digora(R) system can give us as good an image as the standard periapical radiograph and using the paralleling technique instead of the bisecting angle technique can give a measurement closer to the actual canal length, thereby contributing to a successful result. Also, considering the advantages of the digital imaging processor such as decreasing the amount of exposure to the patient, immediate use of the image, magnification of image size, control of the contrast and brightness and the ability of storing the image can give us good reason to replace the standard periapical radiographs.
Bicuspid ; Dental Pulp Cavity* ; Humans ; Periapical Tissue

In order to achieve a successful endodontic treatment, root canals must be obturated three-dimensionally without causing any damage to apical tissues. Accurate length determination of the root canal is critical in this case. For this reason, I've used the conventional periapical radiography, Digora(R)(digital imaging system) and Root ZX(R) (the frequency dependent type apex locator) to measure the length of the canal and compare it with the true length obtained by cutting the tooth in half and measuring the length between the occlusal surface and the apical foramen. From the information obtained by these measurements, I was able to evaluate the accuracy and clinical usefulness of each systems, whether the thickness of files used in endodontic therapy has any effect on the measuring systems was also evaluated in an effort to simplify the treatment planning phase of endodontic treatment. 29 canals of 29 sound premolars were measured with #15, #20, #25 files by 3 different dentists each using the periapical radiography, Digora(R) and Root ZX. The measurements were then compared with the true length. The results were as follows ; 1. In comparing mean discrepancies between measurements obtained by using periapical radiography(mean error : -0.449+/-0.444 mm), Digora(R)(mean error : -0.417+/-0.415 mm) and Root ZX(R) (mean error : 0.123+/-0.458 mm) with true length, periapical radiography and Digora(R) system had statistically significant differences(p<0.05) in most cases while root zx showed none>0.05). 2. By subtracting values obtained by using periapical radiography, Digora(R) and Root ZX(R) from the true length and making a distribution table of their absolute values, the following analysis was possible. In the case of periapical film, 140 out of 261(53.6%) were clinically acceptable satisfying the margin of error of less than 0.5 mm, 151 out of 261(53,6%) were acceptable in the Digora(R) system while Root ZX(R) had 197 out of 261(75.5%) within the limits of 0.5 mm margin of error. 3. In determining whether the thickness of files has any effect on measuring methods, no statistically significant differences were found(p>0.05). 4. In comparing data obtained from these methods in order to evaluate the difference among measuring methods, there was no statistically significant difference between periapical radiography and Digora(R) system(p>0.05), but there was statistically significant difference between Root ZX(R) and periapical radiography(p<0.05). also, there was statistically significant difference between Root ZX(R) and Digora(R) system(p<0.05). In conclusion, Root ZX(R) was more accurate when compared with the Digora(R) system and periapical radiography and seems to be more effective clinically in determining root canal length. But Root ZX(R) has its limits in determining root morphology and nember of rootd and its accuracy becomes questionable when apical foramen is open due to unknown reasons. Therefore the combined use of Root ZX(R) and the periapical radiography are mandatory. Digora(R) system seems to be more effective when periapical radiographs are needed in a short period of time because of its short processing time and less exposure.
Bicuspid ; Dental Pulp Cavity* ; Dentists ; Humans ; Radiography ; Tooth ; Tooth Apex