Preliminary analysis of knee stress in full extension landing

Makinejad, M.D. and Abu Osman, Noor Azuan and Wan Abas, Wan Abu Bakar and Bayat, M. (2013) Preliminary analysis of knee stress in full extension landing. Clinics, 68 (9). pp. 1180-1188. ISSN 1807-5932, DOI

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OBJECTIVE: This study provides an experimental and finite element analysis of knee-joint structure during extended-knee landing based on the extracted impact force, and it numerically identifies the contact pressure, stress distribution and possibility of bone-to-bone contact when a subject lands from a safe height. METHODS: The impact time and loads were measured via inverse dynamic analysis of free landing without knee flexion from three different heights (25, 50 and 75 cm), using five subjects with an average body mass index of 18.8. Three-dimensional data were developed from computed tomography scans and were reprocessed with modeling software before being imported and analyzed by finite element analysis software. The whole leg was considered to be a fixed middle-hinged structure, while impact loads were applied to the femur in an upward direction. RESULTS: Straight landing exerted an enormous amount of pressure on the knee joint as a result of the body's inability to utilize the lower extremity muscles, thereby maximizing the threat of injury when the load exceeds the height-safety threshold. CONCLUSIONS: The researchers conclude that extended-knee landing results in serious deformation of the meniscus and cartilage and increases the risk of bone-to-bone contact and serious knee injury when the load exceeds the threshold safety height. This risk is considerably greater than the risk of injury associated with walking downhill or flexion landing activities.

Item Type: Article
Additional Information: Makinejad, Majid Davoodi Abu Osman, Noor Azuan Abu Bakar Wan Abas, Wan Bayat, Mehdi eng Research Support, Non-U.S. Gov't Brazil Sao Paulo, Brazil 2013/10/22 06:00 Clinics (Sao Paulo). 2013 Sep;68(9):1180-8. doi: 10.6061/clinics/2013(09)02.
Uncontrolled Keywords: Contact force, Finite element analysis, Force of impact, Full extension landing, Knee cartilage injury, Knee components.
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 10 Mar 2014 06:33
Last Modified: 07 Feb 2019 07:52

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