A mathematical modelling study investigating the influence of knee joint flexion angle and extension moment on patellofemoral joint reaction force and stress
| Autor: | Edama Mutsuaki, Takabayashi Tomoya, Inai Takuma, Kubo Masayoshi, Tokunaga Yuta |
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| Rok vydání: | 2019 |
| Předmět: |
musculoskeletal diseases
Knee Joint Patellofemoral joint Quadriceps Muscle Stress (mechanics) 03 medical and health sciences Patellofemoral Joint 0302 clinical medicine Torque Medicine Humans Orthopedics and Sports Medicine Range of Motion Articular Orthodontics Flexion angle business.industry 030229 sport sciences Models Theoretical musculoskeletal system Sagittal plane Biomechanical Phenomena Moment (mathematics) medicine.anatomical_structure Reaction Stress Mechanical business 030217 neurology & neurosurgery |
| Zdroj: | The Knee. 26(6) |
| ISSN: | 1873-5800 |
| Popis: | Background Patellofemoral pain (PFP) is the most common orthopaedic condition among runners. Individuals with PFP exhibit greater patellofemoral joint (PFJ) reaction force and stress when compared with pain-free controls. However, it is not clear whether PFJ reaction force and stress are the highest (or lowest) when knee joint flexion angle and extension moment are in which combinations. We aimed to investigate the influence of knee joint flexion angle and extension moment on PFJ reaction force and stress. Methods A PFJ sagittal model was used to quantify PFJ reaction force and stress. Based on the public dataset of the previous study, peak knee joint flexion angle and extension moment at various running speeds was calculated. Based on the calculated peak value, simulation ranges were set to knee joint flexion angle of 10–45° and extension moment of 0–240 Nm. The quadriceps force, effective lever arm length at quadriceps muscle, and PFJ contact area were determined as a function of the knee joint flexion angle and extension moment, and finally PFJ forces and stress were estimated. Results PFJ reaction force increased as the knee flexion angle and extension moment increased. Although PFJ stress also increased as the knee extension moment increased, it was at the highest and lowest at 10° and about 30° knee joint flexion angles, respectively. Conclusions Incorporating knee flexion posture (approximately 30°) during running may help in reducing PFJ stress, which would be useful in the prevention of pain and act as an optimal treatment program for PFP. |
| Databáze: | OpenAIRE |
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