• 한국운동역학회지
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• 제17권1호
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• pp.135-144
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• 2007

The purpose of this study was to identify the effect of the subtalar sling ankle taping, by measuring changes in peak plantar pressure and subtalar angle during jump landing and walking in healthy subjects with subtalar sling ankle taping applied of the ankle joint. Fifty healthy subjects(8 males and 7 female, aged 22 to 25) were randomly divided into a participated in this study. They were free of musculoskeletal injury and neurologic deficit in lower extremity. The subjects were asked to perform 5M walking and single leg jump landing by under the guidance of physical therapists. Subtalar motions were typically measured as the angle made between the posterior aspect of the calcaneous and the posterior aspect of the lower leg during walking with taping or not. This measurement were made using a video system (30Hz sampling rate, rectified 60 Hz sampling rate). At the same time, peak lateral and vertical pressure were investigated using pressure distribution platforms(MatScan system) under foot during walking and single leg jump landing with taping or not. Statistical analysis was done by paired t-test and intraclass correlation coefficient [ICC(3.1)], using software SPSS. We have recently demonstrated significantly altered patterns of subtalr joint and peak plantar pressure when applied subtalar sling ankle taping(p<.05). Inversion angle of subtalar joint significantly decreased with taping(p<.05). The result suggest that pressure patterns observed in subjects are likely to result due to significant decrease in stress on ankle joint structures during jump landing and walking. Also, the result that the subtalar sling ankle taping procedure provides greater restiction of motion associated with ankle inversion. However, this study involved asymptomatic subjects without history of ankle inversion injury, further research is needed to assess the motion restraining effect of the subtalar sling ankle taping in subjects with lateral ankle instability.

• Journal of Korean Neurosurgical Society
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• 제62권6호
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• pp.661-670
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• 2019

Objective : Rheumatoid arthritis (RA) is known to involve the cervical spine up to 86%. It often causes cervical instability like atlantoaxial subluxation (AAS), subaxial subluxation, and vertical subluxation (VS). In order to find the relation between RA and cord compression, we will evaluate the characteristics and risk factors of basilar invagination (BI) and cervicomedullary junction (CMJ) compression. Methods : From January 2007 to May 2015, 12667 patients administrated to Hanyang University Medical Center. Four thousand three hundred eighty-six patients took cervical X-ray and 250 patients took cervical computed tomography or magnetic resonance imaging. Radiologic parameters, medication records were obtained from 242 patients. Multivariate logistic regression analysis was performed with correlation of CMJ compression, basin-dental interval (BDI), basin-posterior axial line interval (BAI), pannus formation, BI, and AAS. Results : In the point of CMJ compression, atlantodental interval (ADI), posterior-atlantodental interval, BAI, AAS, and BI are relatively highly correlated. Patients with BI have 82 times strong possibility of radiologic confirmed CMJ compression, while AAS has 6-fold and pannus formation has the 3-fold possibility. Compared to the low incidence of BI, AAS and pannus formation have more proportion in CMJ compression. Furthermore, wrist joint erosion was correlated with VS and AAS. Conclusion : BI has a very strong possibility of CMJ compression, while AAS and pannus formation have a high proportion in CMJ compression. Hence bilateral wrist joint erosion can be used as an indicator for the timing of screening test for cervical involvement. We suggest the early recommendation of cervical spine examination for the diagnosis of cervical involvement in order to prevent morbidity and mortality.

• Clinics in Shoulder and Elbow
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• 제14권1호
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• pp.53-58
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• 2011

목적: 저자들은 Remplissage를 이용한 Hill-Sachs 병변 복원술을 시행 후 1년 이상 추시 가능하였던 환자들의 견관절의 안정성 및 임상적, 기능적 결과를 평가하고자 하였다. 대상 및 방법: 2008년 12월부터 2009년 11월까지 본원에서 'Remplissage'술기를 시행하였던 12예를 대상으로 하였으며, 평균 연령은 27.9세였으며 모두 남성이었고, 평균 추시 기간은 19개월이었다. 술 전, 후 평가는 견관절의 운동 범위, ASES 점수, KSSI 점수, ROWE 점수, 술 후 자기공명영상 촬영을 포함하였다. 결과: 술 후 평균 16개월에 견관절 기능적 평가에서 ASES 점수는 술 전 평균 50.8점에서 술 후 평균 78.3점으로, KSSI 점수는 술 전 평균 44.5점에서 술 후 평균 81.0점으로, ROWE 점수는 술 전 평균 40.2점에서 술 후 평균 84.3점으로 향상되었고, 모든 환자에서 견관절 운동범위는 전방 거상 평균 178.6${\pm}$18.6 (165~180)도, 외회전은 평균 49.3${\pm}$10 (43~60)도로 나타났다. 결론: 광범위한 Hill-Sachs 병변이 동반된 재발성 견관절 불안정성에 대한 Remplissage 술기를 시행 후 1년 이상 추시 결과 견관절의 안정성 및 임상적, 기능적으로 양호한 결과를 보여주었다.

• Journal of Korean Neurosurgical Society
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• 제60권5호
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• pp.577-583
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• 2017

Objective : Laminoplasty is an effective surgical method for treating cervical degenerative disease. However, postoperative complications such as kyphosis, restriction of neck motion, and instability are often reported. Despite sufficient preoperative lordosis, this procedure often aggravates the lordotic curve of the cervical spine and straightens cervical alignment. Hence, it is important to examine preoperative risk factors associated with postoperative kyphotic alignment changes. Our study aimed to investigate preoperative radiologic parameters associated with kyphotic deformity post laminoplasty. Methods : We retrospectively reviewed the medical records of 49 patients who underwent open door laminoplasty for cervical spondylotic myelopathy (CSM) or ossification of the posterior longitudinal ligament (OPLL) at Pusan National University Yangsan Hospital between January 2011 and December 2015. Inclusion criteria were as follows : 1) preoperative diagnosis of OPLL or CSM, 2) no previous history of cervical spinal surgery, cervical trauma, tumor, or infection, 3) minimum of one-year follow-up post laminoplasty with proper radiologic examinations performed in outpatient clinics, and 4) cases showing C7 and T1 vertebral body in the preoperative cervical sagittal plane. The radiologic parameters examined included C2-C7 Cobb angles, T1 slope, C2-C7 sagittal vertical axis (SVA), range of motion (ROM) from C2-C7, segmental instability, and T2 signal change observed on magnetic resonance imaging (MRI). Clinical factors examined included preoperative modified Japanese Orthopedic Association scores, disease classification, duration of symptoms, and the range of operation levels. Results : Mean preoperative sagittal alignment was $13.01^{\circ}$ lordotic; $6.94^{\circ}$ lordotic postoperatively. Percentage of postoperative kyphosis was 80%. Patients were subdivided into two groups according to postoperative Cobb angle change; a control group (n=22) and kyphotic group (n=27). The kyphotic group consisted of patients with more than $5^{\circ}$ kyphotic angle change postoperatively. There were no differences in age, sex, C2-C7 Cobb angle, T1 slope, C2-C7 SVA, ROM from C2-C7, segmental instability, or T2 signal change. Multiple regression analysis revealed T1 slope had a strong relationship with postoperative cervical kyphosis. Likewise, correlation analysis revealed there was a statistical significance between T1 slope and postoperative Cobb angle change (p=0.035), and that there was a statistically significant relationship between T1 slope and C2-C7 SVA (p=0.001). Patients with higher preoperative T1 slope demonstrated loss of lordotic curvature postoperatively. Conclusion : Laminoplasty has a high probability of aggravating sagittal balance of the cervical spine. T1 slope is a good predictor of postoperative kyphotic changes of the cervical spine. Similarly, T1 slope is strongly correlated with C2-C7 SVA.

• Korean Journal of Radiology
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• 제22권3호
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• pp.384-394
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• 2021

Objective: To quantitatively assess biochemical alterations in the cartilage of the subtalar and midtarsal joints in chronic lateral ankle instability (CLAI) patients with isolated anterior talofibular ligament (ATFL) injuries and combined calcaneofibular ligament (CFL) injuries using MRI T2 mapping. Materials and Methods: This study was performed according to regulations of the Committee for Human Research at our institution, and written informed consent was obtained from all participants. Forty CLAI patients (26 with isolated ATFL injuries and 14 with combined ATFL and CFL injuries) and 25 healthy subjects were recruited for this study. All participants underwent MRI scans with T2 mapping. Patients were assessed with the American Orthopedic Foot and Ankle Society (AOFAS) rating system. The subtalar and midtarsal joints were segmented into 14 cartilage subregions. The T2 value of each subregion was measured from T2 mapping images. Data were analyzed with ANOVA, the Student's t test, and Pearson's correlation coefficient. Results: T2 values of most subregions of the subtalar joint and the calcaneal facet of the calcaneocuboid joint in CLAI patients with combined CFL injuries were higher than those in healthy controls (all p < 0.05). However, there were no significant differences in T2 values in subtalar and midtarsal joints between patients with isolated ATFL injuries and healthy controls (all p > 0.05). Moreover, T2 values of the medial talar subregions of the posterior subtalar joint in patients with combined CFL injuries showed negative correlations with the AOFAS scores (r = -0.687, p = 0.007; r = -0.609, p = 0.021, respectively). Conclusion: CLAI with combined CFL injuries can lead to cartilage degeneration in subtalar and calcaneocuboid joints, while an isolated ATFL injury might not have a significant impact on the cartilage in these joints.

• 대한정형외과스포츠의학회지
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• 제10권1호
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• pp.4-7
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• 2011

회전근 개 질환은 임상에서 대하는 가장 흔한 견관절 질환이다. 증상을 호소하는 회전근 개 파열 환자를 대하게 되면 수술을 시행할 것인지, 아니면 비수술적 치료를 시행할 것인지의 결정은 진료실에서 당면하는 가장 흔한 과제이다. 그리고 수술적 치료를 선택한다면, 언제 할 것인지, 어떤 수술방법을 선택할 것인지의 결정도 중요하며, 수술을 시행하지 않는 경우는 어떤 치료를 해야 할 것인지 또한 흔히 겪는 문제이다. 본 종설에서는 회전근 개 파열의 경우 언제 수술하나에 해당하는 수술의 적응증과, 수술하지 않는 경우는 어떻게 치료할 것인가? 라고 하는 비수술적 치료의 적응증에 관하여 기술하고자 한다.

• Clinics in Shoulder and Elbow
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• 제12권1호
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• pp.80-83
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• 2009

목적: 삼중 관절와 순 병변(triple labral lesion)은 전방, 후방, 상방 관절와 순의 파열이 동시에 발생한 경우를 말한다. 문헌 보고가 드물어서, 수상 기전과 증상에 대하여 아직 정립되지는 않았다. 대상 및 방법: 본 저자들은, 교통 사고 후 우측 견관절의 동통과 능동적 외전 장애를 보인 39세 남자에서 삼중 관절와 순 병변을 경험하였다. 내원 시에 관절와 상완 관절의 불안정에 대한 증상을 호소하지는 않았다. 흡수성 봉합 나사못과 봉합 갈고리를 사용하여 관절와 순에 대한 봉합술을 시행하였다. 결과: 수술 후 18개월 추시에서, 능동적 운동범위는 정상으로 호전되었으며 일상 생활 중에는 어려움이 없었다.

• 대한관절경학회지
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• 제9권2호
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• pp.167-173
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• 2005

목적: 저자들은 후방 십자 인대 손상과 후외측 회전 불안정성이 동반된 환자에서 양 측 슬괵건을 채취하여 각각 후방 십자 인대 및 후외측 지대 재건술을 시행하고 그 결과를 보고하고자 한다. 대상 및 방법: 2002년 10월부터 2004년 3월까지 후방 및 후외측 회전 불안정성으로 양 측 슬괵건을 이용한 후방십자 인대 및 후외측 지대 재건술을 시행한 10명의 환자를 대상으로 하였다. 남자가 9명 여자가 1명이었고 평균 연령은 36.8세였다. 평균 추시 기간은 17개월(12개월-2년 4개월)이었다. 후방 십자 인대는 환측 슬괵건을 이용하여 횡고정 핀과 Intrafix (Mitek, Norwood, MA) 로 고정하였고 후외측 지대는 비골두에 터널을 뚫어 건측 슬괵건을 통과 시킨 후 대퇴골 외과의 등장점에 흡수성 나사로 고정하였다. 후방 전위 정도는 후방 부하 방사선 사진으로 계측하였고 이학적 검사상 회전 불안정성의 정도를 Noyes와 Barber-Westin의 분류에 따라 평가하였다. 슬관절 기능 평가는 Lysholm 점수와 International Knee Documentation Committee (IKDC) 평가 기준을 이용하였으며 건측 공여부의 평가는 IKDC 평가기준 공여부 항목과 슬관절 굴곡력으로 평가하였다. 결과: 후방 부하 방사선 사진상 술 전 13.3 mm에서 술 후 3.7mm로 호전되었으며 $30^{\circ}$ 및 $90^{\circ}$ 경골 외회전 검사상 기능적 소견을 보인 예가 7예, 부분 기능적 소견을 보인 예가 2예, 실패의 소견을 보인 예가 1예였다. Lysholm 점수는 술 전 54점에서 술 후 86점으로 호전되었다. IKDC 평가 기준상 거의 정상 이상이 8예, 비정상이 2예 이었으며 심한 비정상의 소견을 보인 예는 없었다. 건측 하지 공여부 평가상 2예에서 감각 저하를 호소하였으나 슬관절 굴곡력의 약화 소견은 없었다. 결론: 후방 십자 인대 손상과 후외측 회전 불안정성이 동반된 환자에서 양 측 슬괵건을 이용한 후방 십자 인대 및 후외측 지대 재건술은 양호한 임상 결과와 건측 채취부의 합병증이 적은 좋은 치료 방법으로 사료된다.

• 한국지반공학회논문집
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• 제31권8호
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• pp.51-62
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• 2015

지반공학적으로 제방(또는 댐) 월류에 대한 근거를 제시하기 어렵다. 수문학적인 안정성 평가에서 댐의 초기수위(만수위)를 고정시키고 강우량을 계산하기 때문에 월류 가능성은 매우 희박하다. 그러나 Copula 함수를 사용하여 초기수위가 고정된 댐의 만수위가 아닌 변동성 있는 확률수위를 적용해서 국내 40년간의 빈도를 고려할 때, 월류 가능성을 확인할 수 있었다. 수문학적 댐의 위험성 분석은 다양한 불확실성 인자 중 댐 초기수위에 대한 모의기법 개발이 필요한 복잡한 수문학적 해석을 요구한다. 본 연구에서는 기존 댐 위험도 분석 시 초기수위는 상시만수위 또는 홍수기 제한수위로 가정하지만, 이러한 보수적인 가정에 의한 연구는 기상변동성 및 기후변화의 영향을 고려하지 못하며, 댐의 월류확률 및 이에 따른 붕괴확률을 추정하는데 있어서 지반공학적인 접근이 필요하다. Copula 함수를 이용하여 댐 특성에 맞는 초기수위를 결정하였으며, HEC-5 모형을 활용하여 강우-유출 모형 매개변수의 사후분포를 정량적으로 추정하여 댐 월류확률을 산정하였다. 지반공학적인 측면에서 댐 안정성 해석은 상류사면(upstream)의 수위급강하(drawdown)에 대한 안전율과 하류사면(downstream) 월류상태에서의 불안정성을 비교하여 지반공학적 위험도를 비교 분석하였다.

• 한국운동역학회지
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• 제17권4호
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• pp.99-106
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• 2007

The gait instability in the elderly has been associated with age-related deterioration in physical strength and reducing the potential for elderly falls requires regular exercise. In 2005, National Center for Injury Prevention and Control(NCIPC) reported that most elderly falls occur during activities in daily living(ADL). To better reveal biomechanic mechanisms underlying age-related degeneration in gait stability, and to enhance the assessment of falls risk, an accurate quantification of a person's balance maintenance during locomotion is needed. Instantaneous orientation of the line connecting COP and COM can characterize whole body position with respect to the supporting foot during gait and the angle between this line and the vertical line passing through the COP known as a good assessment to detect the elderly gait instability. Therefore the purpose of this study was to investigate a 6-month walking exercise effects in reducing elderly fall risk factors by using COP-COM inclination angles. Twenty-two community-dwelling elderly participated this study. The participants performed a walking exercise(3 times/week, 1 hour/visit) for 6 months. Laboratory kinematics during walking was assessed at months 0, 3 and 6. Significant increased in gait velocity was found among periods(p=.011, $1.25{\pm}.03$, $1.32{\pm}.03$, and $1.39{\pm}.04\;m/s$ in 0-, 3-, and 6-month, respectively). Also, significant differences in anterior and posteriror inclination angles were found among the periods(p<.05; posterior inclination angles: $12.8{\pm}2.2$, $11.0{\pm}2.9$, & $10.9{\pm}1.9$; anterior inclination angles: $13.7{\pm}1.7$, $14.6{\pm}3.2$, & $1.46{\pm}.21$ in 0month, 3month, & 6month, respectively). These findings provide evidence of significant reduced fall risk factors of community-living older adults associated with a systematic walking program.