PURPOSE: The purpose of this study was to evaluate the pattern and the magnitude of stress distribution in the supporting tissues surrounding three different types of implants(ITI, 3i, and Bicon implant system). MATERIAL AND METHOD: Photoelastic models were made with PL-2 resin(Measurements Group, Raleigh, USA) and three implants of each kind were placed in the mandibular posterior edentulous area distal to the canine . For non-splinted restorations, individual crowns were fabricated on three titanium abutments. For splinted restorations, 3-unit fixed partial dentures were fabricated. Photoelastic stress analyses were carried out to measure the fringe order around the implant supporting structure under simulated loaded conditions(15 lb, 30 lb). CONCLUSION: The results were as follows; 1. Regardless of the implant design, stresses were increased in the apex region of loaded implant when non-splinted restorations were loaded. While relatively even stress distribution occurred with splinted restorations. Splinting was effective in the second implant. 2. Strain around Bicon implant were lower than those of other implants, which confirmed the splinting effect. The higher the load, the more the stress occurred in supporting tissue, which was most obvious in the Bicon system. 3. Stress distribution in the supporting tissue was favorable in the ITI system, while the other side of 3i system tended to concentrate the stress in some parts.
Crowns ; Denture, Partial, Fixed ; Splints ; Titanium

PURPOSE: The purpose of this study was to evaluate the pattern and the magnitude of stress distribution in the supporting tissues surrounding three different types of implants(ITI, 3i, and Bicon implant system). MATERIAL AND METHOD: Photoelastic models were made with PL-2 resin(Measurements Group, Raleigh, USA) and three implants of each kind were placed in the mandibular posterior edentulous area distal to the canine . For non-splinted restorations, individual crowns were fabricated on three titanium abutments. For splinted restorations, 3-unit fixed partial dentures were fabricated. Photoelastic stress analyses were carried out to measure the fringe order around the implant supporting structure under simulated loaded conditions(15 lb, 30 lb). CONCLUSION: The results were as follows; 1. Regardless of the implant design, stresses were increased in the apex region of loaded implant when non-splinted restorations were loaded. While relatively even stress distribution occurred with splinted restorations. Splinting was effective in the second implant. 2. Strain around Bicon implant were lower than those of other implants, which confirmed the splinting effect. The higher the load, the more the stress occurred in supporting tissue, which was most obvious in the Bicon system. 3. Stress distribution in the supporting tissue was favorable in the ITI system, while the other side of 3i system tended to concentrate the stress in some parts.
Crowns ; Denture, Partial, Fixed ; Splints ; Titanium

BACKGROUND: More than 90% of acute stroke patients have measurable cardiovascular sequelae, but we have been often overlooked in formal discussions of treatment. If we estimate the incidence of myocardial injury in patient with spontaneous SAH, we may figure the possibility of cardiac dysfunction in such patients. This study was designed to investigate the incidence of myocardial injury in patients with spontaneous SAH using cardiac troponin I(cTnI). METHODS: A prospective single emergency center study was performed to determined preoperative incidence of unrecognized cardiac injury in patients suffering spontaneous SAH. We include the spontaneous SAH patients who underwent serum measurements of the cardic troponin I immediately upon admission last six month period. ECG, CK, CK-MB and myoglobin were also performed at admission. We excluded the spontaneous SAH patients who had past history of myocardial ischemia and ECG abnormality. RESULTS: Fifty-two patients(34 females, 18 males) with spontaneous SAH were studied prospectively. 18 patients(34.6% of the total study population) had cTnI level above 0.5ng/ml. ECG was performed in 52 patients and was abnormal in 15 of the 52 patients(28.8%). CONCLUSION: The measurement of cTnI has provided physicians with a myocardial marker that has a cardiac sensitivity for cardiac injury equal to that of CK-MB yet with greater specificity. So, cardiac troponin I is useful to estimate the incidence of myocardial injury in patients with spontaneous SAH. And we may estimate the possibility of cardiac dysfunction in such patients. This knowledge will hopefully aid in the care and improve the outcome.
Electrocardiography ; Emergencies ; Female ; Humans ; Incidence* ; Myocardial Ischemia ; Myoglobin ; Prospective Studies ; Sensitivity and Specificity ; Stroke ; Troponin I* ; Troponin*

No abstract available.
Sertoli-Leydig Cell Tumor*

BACKGROUND: Patients with Parkinson's disease and mild cognitive impairment (PD-MCI) and patients with subcortical vascular mild cognitive impairment (svMCI) are known to have cognitive dysfunction. The aim of this study was to determine the cognitive characteristics that can be used to differentiate these two conditions. METHODS: Twenty-two PD-MCI and 22 svMCI patients seen in our neurodegenerative disease clinic, and 22 normal controls were recruited. These three groups were matched in terms of age, gender, and education level. Mild cognitive impairment was diagnosed according to the criteria of Petersen. svMCI should meet the criteria modified from those of Erkinjuntti. RESULTS: Analysis of covariance revealed that frontal executive dysfunction was prominent in both the PD-MCI and svMCI groups after adjusting for depression. The scores in word fluency and the Stroop test were lower in the svMCI group than in the PD-MCI group. Both groups exhibited decreased performance in verbal and visuospatial memory tests. The score in the verbal recognition test was lower in the PD-MCI group than in the svMCI group, which exhibited comparatively reduced visuospatial memory. The depression level was higher in the PD-MCI group than in the svMCI group, as assessed using the Geriatric Depression Scale. CONCLUSIONS: The impairment in frontal executive function was more severe in the svMCI group than in the PD-MCI group, which displayed severe impairment in verbal memory function. These differences in cognitive function may help to differentiate PD-MCI from svMCI, and to further the understanding of their pathophysiologies. PD-MCI patients also exhibited severe depressive mood, which raises the possibility of cognitive improvement through therapy.
Cognition ; Dementia, Vascular ; Depression ; Executive Function ; Humans ; Memory ; Mild Cognitive Impairment ; Neurodegenerative Diseases ; Parkinson Disease ; Stroop Test

To date, very few cases with intraneural ganglion cyst of the peroneal nerve has been reported. The common symptoms include localized pain and various degrees of motor and sensory deficits. Though electrodiagnostic study has been useful in lesion localization, recent imaging studies, such as ultrasonography and magnetic resonance imaging, should be used in establishing differential diagnosis and extent of a lesion preoperatively. Treatment can be achieved by microsurgical removal of the cyst. We had a 74 year old female with right foot drop for 3 months and we diagnosed that she had intraneural ganglion of the peroneal nerve using physical examination, electrodiagnostic study, ultrasonography, and magnetic resonance imaging. Although there was no specific symptom on the left side, there was a similar lesion like that of right intraneural ganglion, that was detected by ultrasonography. However, the patient's neurologic symptoms have not improved after operation.
Aged ; Diagnosis, Differential ; Electrodiagnosis ; Female ; Foot ; Ganglion Cysts* ; Humans ; Magnetic Resonance Imaging ; Neurologic Manifestations ; Paralysis* ; Peroneal Nerve* ; Physical Examination ; Ultrasonography

No abstract available.
Necrosis* ; Typhoid Fever*

We describe two cases of multiple lymphomatous polyposis in the gastrointestinal tract from the esophagus to the rectum. Clinical findings, histopathologic and immunohistochemical findings in paraffin embedded tissue are discussed. It is important to recognize this rare form of gastrointestinal lymphoma because of the prognostic and therapeutic implications.
Antigens, CD/analysis ; Gastrointestinal Neoplasms/immunology/*pathology ; Humans ; Immunohistochemistry ; Intestinal Polyps/immunology/*pathology ; Lymphoma/immunology/*pathology ; Male ; Middle Aged ; Polyps/immunology/*pathology

PURPOSE: The evaluation of clinical skills and attitudes is an essential component of any examination assessing clinical competency. Objective structured clinical examination (OSCE) was introduced in the 1980's to medical educators for the objective evaluation of clinical competency. In this study, the authors describe and analyse their experience with developing and implementing the OSCE for the board licensure examination of plastic surgeons in Korea. METHODS: We developed a 50-minute long OSCE consisting of ten 5-minute (4.5 minute for examination at each station and 0.5 minute for transfer) stations, duplicated. We divided 74 applicants into 8 groups (about 10 applicants per group). Four stations out of the ten in each station-set used a standardized patient (SP). We compared the scores of the duplicated station-sets to assess the reliability of scoring between station-sets. And we analysed the applicants' questionnaire survey feedbacks on this experience administered at the end of the examination. RESULTS: The passing rate of the examination was 100%. The total scores were statistically different between the two station-sets. Applicants were satisfied with the examination, and felt that the problem-solving processes adopted in each station were valid and appropriate for the assessment of clinical competency for board licensure examination. CONCLUSION: We conclude that the OSCE can be widely applied to board licensure examinations of various specialties.
Clinical Competence ; Humans ; Korea ; Licensure* ; Surveys and Questionnaires

PURPOSE: Craniosynostosis of three or more cranial sutures was not common. "Mercedes Benz pattern," named by Moore1 was a rare form of craniosynostosis and had an atypical pattern of premature closure of cranial suture. It was not reported in Republic of Korea. We report this case with literature review. METHODS: A 13-months-old male patient visited our clinic due to exophthalmos. He showed normal developmental course. Other neurological tests were normal but he was Crouzon syndrome patient. CT scans showed bilateral lambdoid and posterior sagittal sutures were fused and the length of the skull was extended. Cranioplasty with pi craniotomy & Barrel-Stave osteotomy and recombination of the bone flap was performed. RESULTS: The patient was discharged after post operative 10 days without any complications. In follow up visit after 2.7 years, he was in good state without recurrence and functional abnormality of skull. CONCLUSION: This was the first case of Mercedes Benz pattern craniosynostosis with Crouzon syndrome in Korea. This type of craniosynostosis has to be considered differently from single type of craniosynostosis or typical syndromic craniosynostosis clinically and surgically.
Cranial Sutures ; Craniofacial Dysostosis ; Craniosynostoses ; Craniotomy ; Exophthalmos ; Follow-Up Studies ; Humans ; Korea ; Male ; Osteotomy ; Recombination, Genetic ; Recurrence ; Republic of Korea ; Skull ; Sutures