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Prediction of Surgical Procedures Effect on Mal-tracking Correction of Patello-femoral Joint Using Patient-specific Musculo-skeletal Modeling
, M.Sc. Thesis Sharif University of Technology ; Farahmand, Farzam (Supervisor) ; Zohoor, Hassan (Supervisor)
Abstract
According to the statistical studies, knee pain is the most common and costliest disorder after low back pain. One of its types is the patello-femoral disorder and instability. Patellar instability can be affected by different factors, such as: low depth of the trochlear groove, low height of the lateral femoral condyle, high length of the patellar tendon, abnormal lateral rotation of the tibia, unusual tibial attachment of the patellar tendon, small patellar size, general loosening of ligaments, etc. So, the mechanical properties of knee joint including patello-femoral joint, surrounding soft tissues, and incoming forces must be examined carefully, in order to find out suitable and...
A Practical Subject-specific FE Model of Human Knee Joint for Pre-planning of Tibial Osteotomy Surgery
, M.Sc. Thesis Sharif University of Technology ; Farahmand, Farzam (Supervisor)
Abstract
Knee joint simulation to analyze the process of osteotomy surgery has been studied in several researches and its effectiveness has been shown. However, these models include many components and details that impose significant time and cost on the patient due to the need for multiple data as well as extensive specialized activity to build and analyze the model. Thus, this study aims to provide a practical finite-element patient-specific model for predicting the outcome and planning of knee osteotomy surgery, such a way that it can be made and processed with little data and in a short time, and also requires little specialized activity. For this purpose, first, a detailed model of the knee...
A rigid body spring model to investigate the lateral shift-Restraining force behavior of the patellar
, Article 29th Annual International Conference of IEEE-EMBS, Engineering in Medicine and Biology Society, EMBC'07, Lyon, 23 August 2007 through 26 August 2007 ; 2007 , Pages 4679-4682 ; 05891019 (ISSN) ; 1424407885 (ISBN); 9781424407880 (ISBN) ; Farahmand, F ; Meghdari, A ; Sharif University of Technology
2007
Abstract
Patellar lateral stability was studied using a 2D transverse plane model with deformable articular surfaces. Quadriceps muscles and patellar tendon were considered as strings with predefined forces and lateral and medial retinaculum as tensile springs. Deformation behavior of articular cartilage was modeled by a set of compression springs perpendicular to articular surfaces, based on rigid body spring model method (RBSM). Patellar lateral stability was investigated using restraining force method (the external force required to cause up to 10 mm lateral displacement on patella). The results were in good agreement with experimental reports for normal joint, vastus lateralis and vastus medialis...