• Proceedings of the Computational Structural Engineering Institute Conference
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• 2009.04a
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• pp.283-286
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• 2009

척추경 나사못을 이용한 요추 유합술은 가장 보편적으로 사용되어지는 수술적 치료 방법이다. 과거 여러 연구들에서 이러한 척추 유합술의 임상적 우수성은 이미 입증 되었으며, 척추경 나사못은 시술 부위의 운동을 완전히 제한함으로써 높은 유합율을 얻을 수 있으나, 상대적으로 인접 분절의 조기 퇴행성 변화의 요인 중 하나로 보고되고 있다. 따라서 본 연구에서는 유한요소해석 방법을 이용하여 척추경 나사못 시술에 따른 척추체의 운동범위 및 인접 분절 추간판의 스트레스 증가량을 계산하였고, 척추경 나사못 모델과 유합 후 나사못 제거에 따른 모델 또 시술하기 전 정상모델과 비교하여 생체 역학적 측면에서 분석하여 척추경 나사못을 이용한 요추 유합술 후, 척추경 나사못의 제거의 임상적 효과와 그 이론적 근거를 제시하고자 한다.

• 대한관절경학회:학술대회논문집
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• 2006.11a
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• pp.45-48
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• 2006

• Journal of the Korean Arthroscopy Society
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• v.14 no.3
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• pp.160-163
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• 2010

• Proceedings of the KSME Conference
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• 2008.11a
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• pp.664-667
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• 2008

Since the advent of pedicle screw fixation system, posterior spinal fusion has markedly increased This intemal fixation system has been reported to enhance the fusion rates, thereby becoming very popular procedure in posterior spinal arthrodesis. Although some previous studies have shown the complications of spinal instruments removal, i.e. loss of correction and spinal collapse in scoliosis or long spine fusion patients, there has been no study describing the benefit or complications in lumbar spinal fusion surgery of one or two level. In order to clarify the effect of removal of instruments on mechanical motion profile, we simulated a finite element model of instrumented posterolateral fused lumbar spine model, and investigated the change of mechanical motion profiles after the removal of instrumentation.

• Journal of the Korean Orthopaedic Association
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• v.55 no.3
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• pp.222-228
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• 2020

As the elderly population increases, the incidence of lumbar fusion is increasing, and there has been increasing interest in rapid rehabilitation and functional recovery after surgery. Enhanced recovery after surgery program and multimodal pain control methods can reduce the complications and allow rapid recovery. Various methods have been used to increase the fusion.

• Journal of the Korean Orthopaedic Association
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• v.55 no.2
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• pp.169-177
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• 2020

Purpose: To assess the effectiveness of mixed grafts in lumbar posterolateral fusion (PLF) by comparing the bone union rates of an autobone with a bone substitute mixed graft. Materials and Methods: The patients were followed-up for at least two years after PLF and divided into four groups according to the mixed graft retrospectively. Group I was 48 cases using a femoral head allobone. Group II was 38 cases using β-tricalcium phosphate. Group III was 92 cases using biphasic calcium phosphate. Group IV was 38 cases using biphasic calcium phosphate and autologous bone marrow. Union was evaluated by the work up simple radiographs after two years from PLF. Union was defined if the radiographs demonstrated a bilateral continuity in the fusion mass between the cephalad and caudal transverse processes with less than 2° of angular motion and no translation between the vertebrae at the level of fusion on the lateral flexion-extension radiographs. Results: According to simple radiographs after two years from PLF, the rate of union was highest in Group IV using local autobone, biphasic calcium phosphate and autologous bone marrow mixed graft. Conclusion: Biphasic calcium phosphate is an osteoconductive bone substitute that increases the bio-absorbability and mechanical strength. Autologous bone marrow has osteoinductive and osteogenic properties. These features can increase the rate of bone union. Therefore, a local autobone, biphasic calcium phosphate and autologous bone marrow mixed graft can be considered an effective bone graft substitute for lumbar PLF instead of an autobone graft.

• Journal of the Korean Orthopaedic Association
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• v.54 no.3
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• pp.237-243
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• 2019

Purpose: To analyze the risk factors for posterior migration of a single cage after transforminal lumbar interbody fusion (TLIF). Materials and Methods: This study was conducted retrospectively on 48 patients (60 discs) who were followed-up for 1 year after TLIF from January 2015 to January 2017. The patients were divided into two groups: group 1 containing 16 patients (17 discs) with cage migration and group 2 containing 32 patients (43 discs) without it. Information related to cage migration, such as the demographic factors, shape of disc, level and location of the cage inserted, and disc height change, was acquired from the medical records and radiologic images, and the possibility for generating posterior migration of cage was evaluated statistically. Results: The demographic factors and cage-inserted level were similar in the two groups (16 patients in group 1, 32 patients in group 2). In the migration group, number of patients with a pear-type disc, 9 patients, was significantly larger; the disc height change, 1.8 mm, was significantly smaller; and the cage was located frequently on non-center in the anteriorposterior view and center in the lateral view in 9 and 15 out of 16 patients, respectively. Conclusion: A pear-type disc shape, small disc height change, cage with non-center on the anteriorposterior view and non-anterior on the lateral view are the risk factors for posterior migration. These factors are important for preventing posterior migration of the cage.

• The Journal of Churna Manual Medicine for Spine and Nerves
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• v.5 no.2
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• pp.127-134
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• 2010

Objectives: The purpose of this study is the evaluation of conservative medical treatment on the herniation of intervertebral disc(HIVD) patient after the fusion surgery of a lumbar segment. Methods: We used acupuncture, herbal medication, and manipulation for this patient. And we measured of VNRS score and SLR test result to evaluate effect of conservative medical treatment. Results & Conclusions: Patient's low back and left leg pain VNRS is decreased, and the SLR test result is improved.

• Journal of Korean Clinical Nursing Research
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• v.17 no.3
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• pp.388-398
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• 2011

Purpose: This study was to develop a post-operative exercise program, apply it to patients undergone lumbar spinal fusion surgery, and evaluate the effectiveness of the program on pain and disability activities of daily living. Methods: Fifty six patients who had lumbar spinal fusion were enrolled in this study. The patients were divided into two groups; 28 patients in the intervention group completed post-operative lumbar exercise program including walking for four weeks and 28 patients in the control group only did walking exercises. The degrees of pain on low back and leg were evaluated using visual analog scale (VAS) and the functional outcome was evaluated using the Korean version of Oswestry Disability Index (KODI) before surgery and 5 weeks after surgery. The data were analyzed using descriptive statistics, Chi-square test, t-test with SPSS 18.0 program. Results: Low back and leg pain of the participants in both experimental and control groups were improved after surgery compared to pre-surgery pain. However, there was no statistically significant difference between the groups. KODI score in the intervention group was significantly lower than that of the control group (p=.014). Conclusion: The developed post-operative exercise program in patients with lumbar spinal fusion surgery seems to be a useful intervention to reduce disability in activities of daily living.

• Journal of the Korean Orthopaedic Association
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• v.56 no.2
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• pp.164-167
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• 2021

Down syndrome is the most common chromosomal disorder and is accompanied by hip osteoarthritis in approximately 28% of patients. This paper reports a case of hip arthrodesis as a treatment for severe hip osteoarthritis in adolescent Down syndrome patients. When performing surgical treatment of patients with Down syndrome, it is necessary to take a comprehensive approach that considers not only the medical point of view, but also the psychological and economic requirements of the patient and their social environment.