Experimental Analysis of the Quadriceps Muscle Force and Patello-Femoral Joint Reaction Force for Various Activities

Reilly, Donald T.; Martens, Magni

doi:10.3109/17453677208991251

Cited by 378 publications

(160 citation statements)

References 0 publications

Supporting

Mentioning

149

Contrasting

Unclassified

Order By: Relevance

“…10,11 Computational models of the musculoskeletal system provide access to the internal loads at the tibiofemoral (TF) and PF joints based on external measurements, and can be used to systematically explore the effects of factors relevant to the internal loading conditions. [12][13][14] While early studies estimated PF forces using 2D analyses, 15 recent models can predict 3D muscle and joint contact forces by employing more complex quasistatic or dynamic optimization techniques. [16][17][18] Here, a large variation in PF forces is apparent, especially for activities involving high knee flexion, 1 with PF forces during squatting ranging from 1.9 19 to 3.1 BW 15 at 1008 flexion.…”

mentioning

confidence: 99%

Patellofemoral joint contact forces during activities with high knee flexion

Trepczynski

Kutzner

Kornaropoulos

et al. 2011

Journal Orthopaedic Research

View full text Add to dashboard Cite

The patellofemoral (PF) joint plays an essential role in knee function, but little is known about the in vivo loading conditions at the joint. We hypothesized that the forces at the PF joint exceed the tibiofemoral (TF) forces during activities with high knee flexion. Motion analysis was performed in two patients with telemetric knee implants during walking, stair climbing, sit-to-stand, and squat. TF and PF forces were calculated using a musculoskeletal model, which was validated against the simultaneously measured in vivo TF forces, with mean errors of 10% and 21% for the two subjects. The in vivo peak TF forces of 2.9-3.4 bodyweight (BW) varied little across activities, while the peak PF forces showed significant variability, ranging from less than 1 BW during walking to more than 3 BW during high flexion activities, exceeding the TF forces. Together with previous in vivo measurements at the hip and knee, the PF forces determined here provide evidence that peak forces across these joints reach values of around 3 BW during high flexion activities, also suggesting that the in vivo loading conditions at the knee can only be fully understood if the forces at the TF and the PF joints are considered together. ß

show abstract

mentioning

confidence: 99%

Patellofemoral joint contact forces during activities with high knee flexion

Trepczynski

Kutzner

Kornaropoulos

et al. 2011

Journal Orthopaedic Research

View full text Add to dashboard Cite

show abstract

“…it increases the strength of its movement while the knee straightens up [11]. in this way, it carries significant forces, reaching up to 1/2 of the body mass while walking [12] and exceeding 7 times the body mass while crouching [13].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonographic evaluation and comparison of articular cartilage of the femur condyles between the limbs in patients with an elevated Q angle

Kusiak¹,

Kawczyński²

2018

Physiother Quart.

View full text Add to dashboard Cite

Introduction. TPatellofemoral pain may be caused by an increase of the pressure of the joint surfaces in the patella and the femur, and, as a consequence, a premature abrasion of joint cartilage. The aim of the study was an ultrasonographic evaluation and comparison of articular cartilage of the femur condyles between the limbs in patients with an elevated Q angle.Methods. The total of 13 women aged 35-45 years with the Q angle exceeding 15° took part in the research. The measurement of the Q angle was carried out with a goniometer.

show abstract

“…These data are compatible with those reported in a study about the femoropatellar dynamics. In the last 30° of extension, the tibial tubercle rotates externally, generating tension over the quadriceps tendon and the patella is laterally dislocated, thus increasing the femoropatellar contact pressure (16)(17)(18) . Tension on the lateral retinaculum is maximal between 30° and 20° flexion, and so is the risk of subluxation (1,11,19) .…”

Section: Bso Lpd Ptamentioning

confidence: 99%

Avaliação quantitativa das forças laterais da patela: ressonância magnética estática e cinemática

et al. 2007

View full text Add to dashboard Cite

OBJECTIVE: To evaluate the usefulness of combining static and kinematic magnetic resonance imaging in the evaluation of the femoropatellar joint. MATERIALS AND METHODS: Twenty healthy volunteers (40 knees) and 23 patients (43 knees) were submitted to both static and kinematic magnetic resonance imaging on a 1.5 tesla whole-body magnetic resonance scanner. The knees were positioned at 30º flexion with the quadrature knee coil at the inner end of the examination table. The patellar translation was evaluated by measurements of bisect offset, lateral patellar displacement and patellar tilt angle. The nonparametric Wilcoxon test was utilized for statistical analysis of data resulting from the static and kinematic studies in both groups. Nonparametric Mann-Whitney test was utilized in the comparison between healthy volunteers and patients. RESULTS: Statistical analysis demonstrated significant differences (p < 0.05) between static and kinematic magnetic resonance imaging for the three parameters evaluated in both groups. Among the patients the differences between static and kinematic measurements were greater than those found in the volunteers, at 30° and 20° flexion, with bisect offset and lateral patellar displacement. CONCLUSION: Static and kinematic magnetic resonance imaging, when performed in association, demonstrated that the lateral forces being exerted on the patella are higher at a knee flexion at the range between 20° and 30°, particularly in individuals symptomatic for femoropatellar instability. Keywords: Knee; Knee joint; Patella; Patellofemoral pain syndrome; Magnetic resonance imaging; Biomechanics; Chondromalacia patellae.Avaliação quantitativa das forças laterais da patela: ressonância magnética estática e cinemática. OBJETIVO: Avaliar a validade da ressonância magnética cinemática combinada com a ressonância magné-tica estática no estudo da articulação femoropatelar. MATERIAIS E MÉTODOS: Foram realizadas ressonân-cia magnética estática e ressonância magnética cinemática em 20 voluntários assintomáticos (40 joelhos) e em 23 pacientes (43 joelhos), em aparelho de configuração fechada de 1,5 tesla de campo. Os indivíduos foram posicionados na extremidade da mesa, em 30° de flexão. A translação patelar foi avaliada medindose o desvio da bissetriz, o deslocamento lateral da patela e o ângulo de inclinação da patela. Para a comparação entre os estudos estático e cinemático, foi utilizado o teste não-paramétrico de Wilcoxon. Para a comparação entre os voluntários e os pacientes, foi utilizado o teste de Mann-Whitney. RESULTADOS: Houve diferenças significantes entre a ressonância magnética estática e a ressonância magnética cinemática (p < 0,05) nos três parâmetros utilizados. No grupo dos pacientes, as diferenças entre a ressonância magnética estática e a ressonância magnética cinemática foram maiores que nos voluntários a 20° e a 30° de flexão, com o desvio da bissetriz e com o deslocamento lateral da patela. CONCLUSÃO: A combinação da ressonância magnética estática e ressonância magnética cinemática evid...

show abstract

Experimental Analysis of the Quadriceps Muscle Force and Patello-Femoral Joint Reaction Force for Various Activities

Cited by 378 publications

References 0 publications

Patellofemoral joint contact forces during activities with high knee flexion

Patellofemoral joint contact forces during activities with high knee flexion

Ultrasonographic evaluation and comparison of articular cartilage of the femur condyles between the limbs in patients with an elevated Q angle

Avaliação quantitativa das forças laterais da patela: ressonância magnética estática e cinemática

Contact Info

Product

Resources

About