No abstract available.
Adult* ; Epiglottitis* ; Humans

Giant cell tumor is a predominantly benign condition but often the tumor is locally aggressive and tends to have high rate of recurrence and it can evolve into a malignant tumor. Thus the lesions have a practically difficult therapeutic problem for the orthopaedic surgeon and any method of treatment has not been satisfied. Between March 1984 and March 1993, clinical observation was carried out on 22 cases of giant cell tumor of bone to analyse the recurrence rate and functional evaluation of the joint according to the treatment methods, pathological grade and cortical destruction. The mean follow-up time was 75. 2 months. The recurrence rate of the intralesional excision group was 54.5% and that of the wide excision group was 9%, There was no relationship between the pathologic grade and recurrence rate. There was no recurrent case in the grade I cortical destruction but almost all of recurrence was occurred in the grade I or II cortical destruction. The functional result of the giant cell tumor occurred around the knee joint was that the mean ratings in the intralesional excision group were 79% and in the wide excision group were 51%. In conclusion, to achieve better joint function and less recurrence rate, intralesional or marginal excision with heat using bone cement or with chemical cauterization using phenol and alcohol can be used for cases of radiological grade I or II, and wide excision for grade III.
Cautery ; Follow-Up Studies ; Giant Cell Tumor of Bone ; Giant Cell Tumors ; Giant Cells ; Hot Temperature ; Joints ; Knee Joint ; Methods ; Phenol ; Recurrence

No abstract available.
Facial Nerve* ; Paralysis*

Purpose: The purpose of this study is to use finite element analysis to predict the fatigue life of an implant system subjected to fatigue load by mastication (chewing force). The reliability and the stability of implant system can be defined in terms of the fatigue strength. Not only an implant is expensive but also it is almost impossible to correct after it is inserted. From a bio-engineering standpoint, the fatigue strength of the dental implant system must be evaluated by simulation (FEA). Material and Methods: Finite element analysis and fatigue test are performed to estimate the fatigue strength of the implant system. Mesh of implant is generated with the actual shape and size. In this paper, the fatigue strength of implant system is estimated: U-fit (T.Strong, Korea, internal type). The stress field in implant is calculated by elastic-plastic finite element analysis. The equivalent fatigue stress, considering the contact and preload stretching of a screw by torque for tightening an abutment, is obtained by means of Sine's method. To evaluate the reliability of the calculated fatigue strength, fatigue test is performed. Results: A comparison of the calculated fatigue strength with experimental data showed the validity and accuracy of the proposed method. The initiation points of the fatigue failure in the implant system exist in the region of high equivalent fatigue stress values. Conclusion: The above proposed method for fatigue life estimation can be applied to other configurations of the differently designed and improved implant. In order to prove reliability of prototype implant, fatigue test should be executed. The proposed method is economical for the prediction of fatigue life because fatigue testing, which is time consuming and precision-dependent, is not required.
Bioengineering ; Dental Implants ; Fatigue* ; Finite Element Analysis ; Korea ; Mastication ; Torque

The fracture of the humerus during arm wrestling are uncommon, but may occur in the shaft or medial condyle. In the shaft of humerus, the fractures are usually spiral and between the middle and distal third, with or without neurological involvement. A case of a comminuted spiral fracture with butterfly fragment of the distal third of the humerus is reported which had occurred during arm wrestling and was treated by open reduction and internal fixation. The possible mechanism of injury and the question of treatment are discussed.
Arm ; Butterflies ; Humerus ; Wrestling

STUDY DESIGN: Retrospective study. PURPOSE: To evaluate the radiological and clinical results of three different methods in the deformity correction of a degenerative flat back. OVERVIEW OF LITERATURE: There are no comparative studies about different procedures in the treatment of degenerative flat back. METHODS: Sixty-four patients who consecutively underwent corrective surgery for degenerative flat back were reviewed. The operations were performed by three different methods: posterior-only (group P, n=20), one-stage anterior-posterior (group AP, n=12), and two-stage anterior-posterior with iliac screw fixation (group AP-I, n=32). Medical and surgical complications were examined and radiological and clinical results were compared. RESULTS: The majority of medical and surgical complications were found in group AP (5/12) and group P (7/20). The sagittal vertical axes were within normal range immediately postoperatively in all groups, but only group AP-I showed normal sagittal alignment at the final follow-up. Postoperative lumbar lordosis was also significantly higher in group AP-I than in group P or group AP and the finding did not change through the last follow-up. The Oswestry disability index was significantly lower in groups AP and AP-I than in group P at the final follow-up. Meanwhile, the operating time was the longest in group AP-I, and total amount of blood loss was larger in group AP-I and group AP than in group P. CONCLUSIONS: Anterior-posterior correction showed better clinical results than posterior-only correction. Two-staged anterior-posterior correction with iliac screw fixation showed better radiological results than posterior-only or one-staged anterior-posterior correction. Two-staged anterior-posterior correction with iliac screw fixation also showed a lower complication rate than one-staged anterior-posterior correction.
Animals ; Congenital Abnormalities* ; Follow-Up Studies ; Humans ; Kyphosis ; Lordosis ; Lumbar Vertebrae ; Reference Values ; Retrospective Studies ; Treatment Outcome

0.05). In amount of mandibular set back, we found the condylar hange(T2-T1) which had increased tendency from Group 1 to Group 3 and decreased tendency of MM' from Group 1 to 3. but there was no statistical significance (p>0.05). There was some correlation between condylar change and TMJ dysfuction. It seemed that postoperative condylar change had influenced the postoperative TMJ dysfunction, though was no statistical significance (p>0.05). As we have observed the change of condylar axis in the group that complained of TMJ dysfunction after operation in cases of large amount of mandibular set back, do we consider that the more trying to onserve the condylar position will decrease the occurrence rates of the postoperative condylar displacement, TMJ dysfunction and the relapse.]]>
Axis, Cervical Vertebra ; Female ; Humans ; Orthognathic Surgery ; Prognathism ; Recurrence ; Temporomandibular Joint

Intestinal obstruction is a rare but important complication of pregnancy and puerperium leading to increased maternal and fetal motality. Diagnosis is often delayed or missed because many of the manifestations of intestinal obstruction such as nausea, vomiting and abdominal pain can be interpreted as pregnancy related symptoms. This delay in diagnosis or misdiagnosis, reluctance to surgery during pregnancy are thought to be responsible for the high maternal and fetal death rate. So we report a case of postpartum small bowel obstruction following vaginal delivery with a review of the literature.
Abdominal Pain ; Diagnosis ; Diagnostic Errors ; Fetal Death ; Intestinal Obstruction ; Nausea ; Postpartum Period* ; Pregnancy ; Vomiting

PURPOSE: Thallim-201 (201Tl) brain SPECT, which can represent cellular activity of brain lesions, may provide more useful information in differentiating between benign and malignant brain lesions more so than CT or MRI, that merely represents anatomic changes or breakdown of blood brain barrier. We used 201Tl brain SPECT prospectively to evaluate the utility of 201Tl-indices as an indicator of benign or malignant lesions. MATERIALS AND METHODS: We studied 28 patients. There were 13 cases of benign lesions (3: nonspecific benign lesion, 3: meningioma, 2: low grade glioma, 1: tuberculoma, central neurocytoma, hemangioblastoma, radiation necrosis, and choroid plexus papilloma) and 15 cases of malignant lesions (6: glioblastoma multiforme, 5: anaplastic glioma, 2: medulloblastoma, 1: metastasis and lymphoma). In all patients, CT and/or MRI were obtained and then 201Tl brain SPECT was obtained with measuring mean 201Tl index and peak 201Tl index. An unpaired t-test was performed to compare the 201Tl-indices and pathologic diagnoses to evaluate the utility of 201Tl-indices as an indicator of benign or malignant lesions. RESULTS: There were no statistically significant difference in 201Tl-indices between benign and malignant brain lesions (P>0.05). CONCLUSION: These results demonstrated that we could not use 201Tl indices on brain SPECT alone as an indicator of benign or malignant brain lesions.
Blood-Brain Barrier ; Brain* ; Choroid Plexus ; Diagnosis ; Glioblastoma ; Glioma ; Hemangioblastoma ; Humans ; Magnetic Resonance Imaging ; Medulloblastoma ; Meningioma ; Necrosis ; Neoplasm Metastasis ; Neurocytoma ; Prospective Studies ; Tomography, Emission-Computed, Single-Photon* ; Tuberculoma

No abstract available.
Classification* ; Female ; Hydatidiform Mole* ; Pregnancy