Abstract— The main aim is to develop the three dimensional solid finite element model of knee joint to predict stress in its individual components (Femur, Tibia, Menisci and Patella) and to determine the load carried by a pre – selected ligamentous tissue. This work assists to analyze a knee response to a dynamically applied load. This simulated analysis will serve to be an alternative approach to destructive tests and intrusive procedures and helps to achieve closer simulation to reality. The main expectation is to simulate the whole articulation using three dimensional solid models. This paper will aid to control the geometry of movements of knee joint. This Modeling will be helpful to study underlying mechanisms for knee injuries.
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Construction of bone models is performed usually on the basis of CT (computed tomography) scans.
II. METHOD
A. 3D CAD Model Computerized tomography (CT) scans of human knee were used to capture bone geometry. CT scans were obtained from a 22 year old healthy male volunteer. Scanning was carried out on the left knee. Mimics calculate surface 3D models from stacked image data such as CT images through image segmentation. The process was conducted in all three orthogonal planes by rotation and translation of CT images until the corresponding structures were matched. Subsequently, 3D geometry of the knee joint was reconstructed from high resolution CT images at intervals of 0.5mm in all three anatomical planes using Mimics software. The 3D scanned data were transformed into highly accurate surface, polygon and native CAD models using Geomagic studio software. In case of error in the Mimics model, it can be rectified in Geomagic studio software. The generated surface model was converted in to iges
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Both meniscus and ligaments were designed in CATIA as different components. The data’s for length and cross sectional area of ligaments, ligament insertion sites, menisci peripheral length range, area of Contact points of meniscus were obtained from previous FE and experimental studies. At last stage of the design; bones, meniscus and ligaments were assembled in CATIA.
B. Finite Element Mesh The assembled solid Model from CATIA was converted to surface model in Hypermesh by deleting the solid body. The intersection surface in the assembly model was trimmed. The intersection surfaces which were improper, was recovered with proper surface from the other proper end of the component. The surfaces were made proper using toggle edge. 2D elements were created by selecting the surface of the single component at once and triangular mesh of element size 0.5 was given to get the accurate results. The edges were repaired by replacing the nodes
DOI: 12/13/2012. This is a case of a 63-year-old male security officer who sustained a work-related injury to the right knee when he missed a step and fell down the stairs. As per Omni, the patient had a right knee meniscus tear. The patient had right knee replacement on 11/19/14.
Clinical Orthopaedics and Related Research®, 471(4),
Patellar- Kneecap 31. Crural- Leg 32. Fibular or Peroneal- Fibula 33. Pedal- Foot 34.
Introduction The aim of this review paper is to access the anterior cruciate ligament (ACL) injury of the knee (tibiofemoral) joint, which is a common sport and exercise injury related to the musculoskeletal system. Investigation of the anatomy and physiology of the knee joint, and the diagnosis, etiology, pathophysiology, treatment, rehabilitation and prevention of ACL injuries will provide a descriptive epidemiology. This will aid readers in making informed management and treatment decisions, and guide them to safely perform movements to prevent injury. This review paper will incorporate holistic views on relevant scientific research, including primary resources such as journal articles and lecture notes, which will be cross-referenced
To determine the maximum length of the femur the negroid formula was used. The height range was 146.41-153.23cm. For the humorous the mongoloid and negroid formulas were used to find the maximum length of the humerus. The height range for the mongoloid formula was 138.74-142.44cm. Then for the negroid formula 148.2-156.7cm was the height range.
33, no. 1, Sept. 2006, p. 9. EBSCOhost, search.ebscohost.com/login.aspx?direct=true&db=hxh&AN=22200559&site=ehost-live.Marx, Robert. The ACL Solution : Prevention and Recovery for Sports' Most Devastating Knee Injury. Demos Health, 2012. EBSCOhost, search.ebscohost.com/login.aspx?direct=true&db=e000xna&AN=473473&site=ehost-live.McDaniel, Larry W., et al.
Understanding the cause of sports injury requires a precise description of the injury mechanism. Over two million anterior cruciate ligament (ACL) injuries occur worldwide annually, and the greater prevalence for ACL injury in young female athletes is one of the major problems in sports medicine. The most common gender differences are reduced knee and hip flexion when landing, increased knee valgus, internal rotation of the femur and high quadriceps activity unbalanced by the hamstrings in female athletes (Renstrom 2013). The female ACL is smaller in length, cross-sectional area, and volume than the male ACL, even after adjusting for body anthropometry (Shultz 2010). The mechanical and molecular properties of the ACL are likely influenced not only by estrogen but also by the interaction of several sex hormones, secondary messengers, remodeling proteins, and mechanical stresses (Shultz 2010).
To make the knee joint in the center, we would need to move the field size anteriorly half an inch to an inch. There is optimal exposure with no motion. This image also visualizes the soft tissue, including fat pad region anterior to knee joint and sharp trabecular markings. My marker is clearly demonstrated and is out of any anatomy. There are no artifacts on this
The knee joint is one of the strongest and most important joints in the human body. It allows the lower leg to move relative to the thigh while supporting the body’s weight (Taylor, n.d.) as knee joint is one of the major weights bearing joint in the body. Knee joint plays an important role in our daily lives such as walking, running, sitting and standing. It allows physiological movement such as flexion and extension.
The most common knee injuries and torn ligaments are in football. Some of these injuries could end your college season of football, and you would not even get paid once you have to stop because of an
As more young men and women play sports in today’s society there is a greater risk of an ACL tear; however, there is also more knowledge about the procedures to fix it as well. Warren explains, “In the 1960’s and 1970’s, ACL injuries were often missed diagnostically, treated relatively poorly, or not treated at all.” About fifty years ago no doctor had the technology or knowledge of the body that doctors have now to fix an ACL tear. Back then doctors either let the athlete play while they were still injured or they would give them a shot to feel better. In the past ACL tears were not as usual as they are now.
No parent or coach wants to see a sport-loving child on the sidelines, which is why safety must always come first. For this reason, the first step towards successful knee injury prevention is understanding the types of football knee injuries. Sprains – the knee sprains involve damage to the ACL and/or the MCL. In severe cases, sprains involve complete tears of one or more knee ligaments.
(2002), it was found that females with a history of stress fractures showed greater peak impact forces, higher loading rates and a greater peak tibial acceleration than a group of control females who did not have a history of stress fractures. James et al. (1978) stated that the average runner could run up to 130km/week meaning the lower limb is subjected to approximately 40000 impacts over a weekly period. He also states that although a limb with normal alignment may withstand this type of repeated loading, an athlete with abnormal alignment, such as overpronation, can be a risk for developing an overuse running related injury. Soft tissue structures of the body such as muscles are adaptive to these forces and act to disperse forces as they move up along the
The gastrocnemius muscle of the frog was dissected away from the tibio-fibula bone while still being attached to the knee. The other parts such as the foot, thigh muscles and others were removed from the tibio-fibula except for the sciatic nerve and gastrocnemius. Bone shears was used to cut the tibio-fibula bond 8-10mm below the knee. The femur was cut close to the hip joint. The muscle left in the petri dish was moistened using the Frog Ringer’s until ready to
This can used as a parameter in improvising designs of prosthetic feet, on obtaining the radius of curvature values. Roll over shape is like the fingerprint for a person when it comes to gait. From roll over shapes, we can get radius of curvature, which is a measurement of stability of a person’s gait. The study also showed us results about the three most widely used prosthetic feet, proving Jaipur foot to be a better option when it comes to choosing prosthetic