• 한국운동역학회지
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• 제21권1호
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• pp.107-114
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• 2011

Closed kinematic chain exercises such as squatting have been widely indicated for knee rehabilitation in patients with patellofemoral disorders such as osteoarthritis and patellofemoral pain. Patellofemoral disorders are thought to be associated with abnormal patellar kinematics. In addition, the Q-angle may be undervalued in patients with patellofemoral pain and a laterally displaced patella. The purpose of this study was to assess patellar kinematics and the Q-angle during double-leg semi-squat and wall-slide semi-squat exercises. In this study, 28 asymptomatic subjects(16 male, 12 female) were assessed. Patellar tilt, patellar spin, and Q-angle were recorded using a motion analysis system during double-leg semi-squat and wall-slide semi-squat exercises. The Q-angle and patellar tilt were significantly increased, whereas patellar spin was significantly decreased, at $45^{\circ}$ of knee flexion compared with $0^{\circ}$. No differences were observed for the Q-angle, patellar tilt, and patellar spin during double-leg semi-squat and wall-slide semi-squat exercises. However, a significant interaction was observed between squat type and knee angle for patellar spin. We found that the patella is laterally tilted during semi-squat exercises and that there was no difference in patellar tracking between knee flexion during double-leg semi-squat and wall-slide semi-squat exercises.

• Korean Journal of Radiology
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• 제23권6호
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• pp.674-687
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• 2022

Patellofemoral instability (PFI) is common in pediatric knee injuries. PFI results from loss of balance in the dynamic relationship of the patella in the femoral trochlear groove. Patellar lateral dislocation, which is at the extreme of the PFI, results from medial stabilizer injury and leads to the patella hitting the lateral femoral condyle. Multiple contributing factors to PFI have been described, including anatomical variants and altered biomechanics. Femoral condyle dysplasia is a major risk factor for PFI. Medial stabilizer injury contributes to PFI by creating an imbalance in dynamic vectors of the patella. Increased Q angle, femoral anteversion, and lateral insertion of the patellar tendon are additional contributing factors that affect dynamic vectors on the patella. An imbalance in the dynamics results in patellofemoral malalignment, which can be recognized by the presence of patella alta, patellar lateral tilt, and lateral subluxation. Dynamic cross-sectional images are useful for in vivo tracking of the patella in patients with PFI. Therapeutic approaches aim to restore normal patellofemoral dynamics and prevent persistent PFI. In this article, the imaging findings of PFI, including risk factors and characteristic findings of acute lateral patellar dislocation, are reviewed. Non-surgical and surgical approaches to PFI in pediatric patients are discussed.

• 대한관절경학회지
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• 제10권1호
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• pp.61-69
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• 2006

목적: 슬개-대퇴간 부정 정렬 환자에서 외측 지지대를 이완시키는 수술에는 지금까지 관혈적 이완술(Open release), 고식적 관절경적 이완술(arthroscopic complete release)등의 방법을 이용하여 왔으나 저자는 관절경적 선택적인 이완술(arthroscopic selective release)로 이환된 지지대만을 최소 절제하여 수술함으로써 수술 후 환자의 합병증 및 만족도 등의 결과를 비교 분석하여 환자에게 가장 유용한 방식을 알아보고자 한다. 대상 및 방법: 1993년 1월부터 1998년 6월까지 외측 지지대 이완술을 시행하고 추시 가능하였던 94명, 129예 중 관절경적 이완술의 경우 68명, 90예, 관혈적 이완술의 경우 26명, 39예였으며 관절경적 이완술의 경우 고식적인 방식에 의한 경우가 42명, 57예였으며 이환된 외측지지대만을 선택적으로 이완시킨 경우가 26명, 33예였다. 위 예를 대상으로 수술 전 계측과 수술 후 1년, 수술 후 5년 이상의 최종 추시를 시행하여 슬개골 경사, 전위, 수렴 각, O-angle을 방사선학적 및 임상적으로 측정하여 분석하였으며, 임상적 평가는 슬관절 평가 지수 및 변형 슬개골 지수를 이용하였다. 결과: 방사선학적 평가에서 슬개골 경사와 전이는 고식적인 방법에 의한 관절경적 이완시$13.4^{\circ}$, 12.1 mm에서 $3.6^{\circ}$, 3.8 mm로, 관절경하 선택적 이완시 $12.3^{\circ}$, 11.2 mm에서 $4.8^{\circ}$, 5.2 mm로, 관혈적 이완시 $13.6^{\circ}$, 12.3mm에서 $3.3^{\circ}$, 3.4 mm로 향상된 결과를 보였으나, 통계적으로는 유의한 상관관계를 보이지 않았다. 슬관절 평가 지수는 각각 84.2%(48/57), 81.8%(27/33), 82.1%(32/39)에서, 변형 슬개골 지수는 82.5%(47/57), 81.8%(27/33), 82.1%(32/39)에서 만족스러운 결과를 보였고 서로 간에 유의한 차이는 보이지 않았다. 결론: 슬개-대퇴 부정 정렬을 가진 환자의 수술방법 중 하나인 관절경적 선택적 이완술은 적은 수술범위에서 이환된 지지대를 이완시킴으로써 유착등의 합병증 없이 환자의 재활 및 만족도를 높이는 하나의 치료 방법으로서 관혈적 방법과 고식적 관절경적 수술보다 좋은 치료라고 판단된다.

• 한국임상수의학회지
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• 제34권5호
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• pp.318-324
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• 2017

The objective of this study was to establish kinematic reference ranges for the femorotibial (FT) joint and the patellofemoral (PF) joint in healthy small-breed dogs by measuring 3D kinematics at the walk. Single-plane fluoroscopy was used to image the stifle joints of five healthy beagle dogs while the dogs were walking. 3D bone models of the femur, patella, and tibia were reconstructed by computed tomography scanning of the beagle dogs' hind limbs. The shape-matching technique was used to measure kinematic data from the fluoroscopic images and the 3D bone models. The cranial translation of the tibia during walking was inversely proportional to the FT joint flexion. There were significant correlations between the patellar motion and the tibial motion. The FT joint flexion had a strong correlation with the patellar proximodistal translation and flexion. Additionally, the tibial mediolateral translation had a strong correlation with the patellar shift and tilt. In this study, normal in vivo 3D FT joint and PF joint kinematics were demonstrated, and the average kinematic parameters were determined in walking beagle dogs.

• 한국전문물리치료학회지
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• 제26권1호
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• pp.75-83
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• 2019

Background: A tight iliotibial band (ITB) may lead to lateral patellar maltracking, compression, and tilt, and dominant vatus lateralis (VL) muscle activation relative to vastus medialis oblique (VMO) can laterally displace the patella, which leads to anterior knee pain. Therefore, an effective management technique is needed to stabilize the patella in individuals with tight ITB. Increased stability during the modified Thomas test has the potential to decrease compensatory motion and thus to selectively stretch the ITB. Objects: The purpose of this study was to determine the effects of ITB stretching in the modified Thomas test position on ITB flexibility, patellar translation, and muscle activities of the VMO and VL during quadreceps-setting (QS) exercise in individuals with tight ITB. Methods: Twenty-one subjects with tight ITB were recruited. Digital inclinometer was used to measure the hip adduction angle during the modified Ober test. Universal goniometer was used to measure the hip abduction angle during the modified Thomas test. Ultrasonography was used to measure the patella-condylar distance. Electromyography was performed to collect data of muscle activities. Paired t-test was used to determine the statistical significance between pretest and posttest. Results: The range of hip adduction in modified Ober test increased (p=.04) and the range of hip abduction in the modified Thomas test decreased after ITB stretching (p<.01). There was no difference between lateral patellar translation (p=.18). VMO muscle activity significantly increased after ITB stretching during QS (p<.01). VL muscle activity had no difference after stretching. Conclusion: The ITB stretching in the modified Thomas test position can be suggested as a management method for improving ITB flexibility and VMO muscle activity in individuals with tight ITB.

• 대한관절경학회지
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• 제10권2호
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• pp.214-218
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• 2006

목적: 급성 또는 재발성 슬개골 탈구의 치료에 있어서 내측 슬개-대퇴 인대의 해부학적 위치를 고려하여 견인 봉합술을 이용한 관절경적 내측 관절막 중첩술을 새롭게 고안하였기에 소개하고자 한다. 수술 술기: 관절경하에서 내측 슬개-대퇴 인대가 위치하는 부위의 내측 관절막에 봉합사를 관절 밖에서 안으로 통과시킨다. 슬개골에 유도강선으로 3개의 터널을 뚫는데, 그 관절내 입구가 슬개골의 내측 변연 상부 1/2에 위치하도록 한다. 관절 내로 들어와 있는 봉합사를 슬개골의 터널을 통해 관절 밖으로 빼내고, 봉합사에 긴장을 준 상태에서 적절한 정도로 외측 지대 유리술을 시행한 후 봉합사를 결찰한다. 결론: 본 술기는 최근 중요시되고 있는 내측 슬개-대퇴 인대를 봉합함으로써 내측 관절막 중첩술의 효과를 극대화시키고 슬개골의 아탈구 및 경사를 교정할 수 있으며, 최소 침습적이고 비교적 쉽고 간단하여 급성 또는 재발성 슬개골 탈구의 치료에 있어서 효과적인 술식으로 생각된다.