http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Extragraft bone formation after ACDF using two different bone remodeling algorithms
박원만,진용준,최청열 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.4
Extragraft bone formation is necessary to achieve solid union after spinal fusion including anterior discectomy and fusion. However, its mechanism is not well reported. In this study, extragraft bone graft was investigated based on the hypothesis that mechanical stimuli primarily cause extragraft bone formation. It was simulated using finite element analysis integrated into the developed Matlab codes. Matlab codes for simulating extragraft bone formation were developed using two different algorithms named the sequential and simultaneous algorithms. While the sequential algorithm simulates the layer-by-layer bone formations, the simultaneous algorithm predicted bone formation in the whole region of the pre-defined bone formation region. The results showed that sequential bone formation using the sequential algorithm showed good agreement to the medical observations. The results also showed the simultaneous algorithm may result in non-logical extragraft bone formation and it overestimates the bone formation. Based on the results the authors concluded that a sequential bone formation algorithm is necessary for simulating intramembranous ossification accelerated by mechanical stimuli similar to extragraft bone formation.
손세일,진용준,김기정,김현집 대한척추신경외과학회 2011 Neurospine Vol.8 No.4
A 45-year old man, who had tuberculosis five years ago presented with paresthesia, decreased proprioception, and gait disturbance in the lower extremity which were aggravated for a month. Magnetic resonance imaging revealed the T3-7 intradural extramedullary fibrotic mass with dark signal intensity on T2-weighted images. The yellowish material in the thick fibrous mass was confirmed as caseous necrosis. Two days after the operation, the symptoms improved. Although quite rare, intradural extramedullary tuberculoma should be considered as a chronic sequel of the previous medical history of pulmonary tuberculosis or tuberculous meningitis.
Paragangliomas in Cauda Equina Region: Clinicopathoradiologic Findings in Four Cases
양승엽,정천기,진용준,박성혜,장태안,김현집 대한신경외과학회 2004 Journal of Korean neurosurgical society Vol.35 No.4
Objective : Four cases of non-secreting paraganglioma of the cauda equina are present with an emphasis on magnetic resonance (MR) images correlated with pathological features. Methods : From 1973 to 2001, 703 patients with spinal cord tumors had been treated with surgery at our hospital. Among them, four patients had been diagnosed as paragangliomas, all of which occurred in the cauda equina. We analyzed clinical data, including medical records, radiological, and histopathological findings for four patients. Results : Some findings may help us to differentiate spinal paraganglioma from other spinal tumors. The MR images of the tumor were generally nonspecific. However, tumor margins were hypointense on T2-weighted images and serpiginous flow voids were noted in the tumor. Histopathologically paragangliomas were composed of an organoid or 'zellballen' arrangement of polyhedral and argyrophilic cells, circumscribed by a richly vascular stroma. Immunohistochemical examination showed positive reaction to synaptophysin, chromogranin, vimentin, neuron specific enolase, and S100 protein. Conclusion : Although it is difficult to make a correct diagnosis as paraganglioma preoperatively for the intradural extramedullary tumors, especially in the cauda equina, paraganglioma should be included in the differential diagnose
Exercise-Induced Paraspinal Muscle Rhabdomyolysis with Seconary Compartment Syndrome: A Case Report
조숭문,이기재,진용준,김기환,이경은,심재찬,황대현,김호균 대한영상의학회 2019 대한영상의학회지 Vol.80 No.6
Lumbar paraspinal compartment syndrome is an uncommon cause of acute lower back pain. It can result from intense physical activity or as a complication of surgery or medication. Lumbar paraspinal compartment syndrome without external trauma is rarely reported in literature. We report a case of compartment syndrome that followed back muscle exercise and caused rhabdomyolysis. MRI findings include bilateral bulging of the paraspinal muscle, hyperintensity on T2-weighted image, and heterogeneous enhancement. Moreover, loss of intramuscular vasculature on a contrast-enhanced CT scan attributed to diagnose compartment syndrome in this case.
Eosinophilic Granuloma in an Adult Thoracic Spine: A Case Report
김정균,김욱하,윤상훈,진용준,김기정,김현집 대한척추신경외과학회 2010 Neurospine Vol.7 No.3
In adults, eosinophilic granuloma of the spine is a rare, benign osteolytic lesion. In a case of a 33-year-old man with neu- rologic deterioration, magnetic resonance imaging (MRI) showed an osteolytic lesion of the T4 vertebra with spinal cord compression. Involvement of the left pedicle of T4 and paravertebral soft tissue was also observed. On the second day after a fluoroscopic percutaneous needle biopsy, the patient abruptly developed paraplegia. He underwent an emergency operation with posterior decompression, followed by anterior stabilization and corpectomy several days later. Histological examination of the tissue, including the paravertebral soft tissue, showed features of eosinophilic granuloma. After surgery, the patient returned to full activity. Eosinophilic granuloma of the spine is a rare disease in adults and may affect all the vertebral structures. Surgical treatment seems necessary for cases specifically involving progressive neurologic deficits
김기정,정상기,김현집,진용준,윤상훈 대한척추신경외과학회 2009 Neurospine Vol.6 No.2
Since 1966 the first metal ball shape implant was inserted into the cervical and lumbar areas by Dr. Fernström, numerous attempts and prostheses have been tried to maintain physiologic range of motion and prevent adjacent segment degeneration (ASD) after surgery. However fusion itself is not a single causative factor of ASD and other biologic factors including natural progression of degenerative process and mechanical factors also contribute in the development of ASD. Several well designed prospective randomized control studies for Bryan disc and Prodisc C have been recently documented preservation of spinal motion, superior or, at least, equivalent clinical outcome in comparing with anterior cervical arthrodesis, and less adverse postoperative events both in frequency and severity. Still remained or undetermined problems in cervical arthroplasty are heterotopic ossifications, segmental kyphosis of implanted levels, MR imaging compatibility, vertebral body fracture by keeled prostheses and long term wear properties. In spite of these unsolved problems and incompleteness of prosthetic design, cervical arthroplasty is now considered as one of standard methods in surgical management of one or two level cervical disc diseases and its indication may be broader in near future. Since 1966 the first metal ball shape implant was inserted into the cervical and lumbar areas by Dr. Fernström, numerous attempts and prostheses have been tried to maintain physiologic range of motion and prevent adjacent segment degeneration (ASD) after surgery. However fusion itself is not a single causative factor of ASD and other biologic factors including natural progression of degenerative process and mechanical factors also contribute in the development of ASD. Several well designed prospective randomized control studies for Bryan disc and Prodisc C have been recently documented preservation of spinal motion, superior or, at least, equivalent clinical outcome in comparing with anterior cervical arthrodesis, and less adverse postoperative events both in frequency and severity. Still remained or undetermined problems in cervical arthroplasty are heterotopic ossifications, segmental kyphosis of implanted levels, MR imaging compatibility, vertebral body fracture by keeled prostheses and long term wear properties. In spite of these unsolved problems and incompleteness of prosthetic design, cervical arthroplasty is now considered as one of standard methods in surgical management of one or two level cervical disc diseases and its indication may be broader in near future.