saeide fatemifar; behrooz sepehri; alireza mousavian; pegah khazaee nejad
Abstract
Background: There are some relatively definite indications for fixing these problems which can be as the surgery with Osteotomy and the deformation and making the bone fixed in new location. There are so many techniques in this field with respect to the surgery and the kind of osteotomy, and with respect ...
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Background: There are some relatively definite indications for fixing these problems which can be as the surgery with Osteotomy and the deformation and making the bone fixed in new location. There are so many techniques in this field with respect to the surgery and the kind of osteotomy, and with respect to the kind and fixation tool.Genovalgum is usually a disorder in femur distal and this point can be repaired by osteotomy. From the past, the blade plate is an attractive option for the fixation which can be harder than newer methods like lockable blade-plates for the younger surgeons. In this research, our goal was to present a new design of blade plate for more easiness in tool installation and test the finite element for making sure of the effectiveness of the new tool. The goal of this research is to design a modular sample of blade plate and the biomechanical comparison of these two states in the finite element form. In this research, the biomechanical behavior of these two methods with pseudo-static loading on the made model in the finite element software. Methods: The CT-Scan images were transformed to Mimics software. Then, the model under biomechanical analysis was placed in abaqus19.0 software in pseudo-static form. The bone was considered as orthotropic and stainless-steel implant. Results: In the comparison of the tension of blade plate and bone, the tension on the blade-plate and bone has been reduced in modular blade plate which is possibly related to the energy waste in the connection of blade and plate. The strain of modular blade plate is significantly less than the older blade plates, but the strain of the bone without orthosis is much more similar to the previous blade plate with respect to the strain of the bone
Mohammad Haghpanahi; S Moradi
Abstract
Background:Characterization of mechanical behavior of meniscus is very important issue due to significant role of meniscus in load bearing within the knee joint and identifying mechanical change in meniscal tissue is of particular interest with respect to osteoarthritis (OA) research. Acl tear can also ...
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Background:Characterization of mechanical behavior of meniscus is very important issue due to significant role of meniscus in load bearing within the knee joint and identifying mechanical change in meniscal tissue is of particular interest with respect to osteoarthritis (OA) research. Acl tear can also have deep impression on the meniscus clinically. Meniscus injury is common in pations with tear Acl.
Objectives: The purpose of this study is to survey Longitudinal tear meniscus for analysis and a finite element analysis model to achieve tension on the knee with Acl stability during meniscus tear and unstability of this Acl used on determine the procedure distribution compared the processing the output of different models.
Methods & Materials: 3-dimensional finite element model of knee joint biomechanics with the help of CT scan images were made. Healthy hip bone structure were designed with mimics software. The obtained model to Abaqus software is compiled for analysis.
Result: The maximum shear stress on page medial meniscus 1.73 Mpa and lateral meniscus on the page is 1.48Mpa. As a result, the amount of tension in the meniscus is more internal than external meniscus. The medial meniscus will be damaged more. In cruciate ligament tear sustained maximum shear stress 8.33Mpa on page medial meniscus and cruciate ligament tears with instability maximum shear stress is on page medial meniscus 9.65Mpa.
Conclusion: The result confirmed that biomechanical response of meniscus tear and Acl tear an important role in the stability of the meniscus. A meniscus and ligament tears in the meniscus increased levels of stress and stress distribution diagram.
