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Stress-Strain Analysis of Plate for Fixing Proximal Tibial Fracture
Votava, Tomáš ; Chamrad, Jakub (referee) ; Marcián, Petr (advisor)
This master thesis is focused on stress-strain analysis of tibia with fixed proximal tibial fracture. Two types of fixation were considered, for each one two variants of solution were made. In the first part of this theses is presented a review of available literature connected with stress-strain analysis of tibia with fixed proximal tibia fracture. Next one is presented a research study of anatomy and biomechanics focused on lower limb. In the last part of research part are presented proximal tibial fractures and way of their fixation. Computational modeling using finite element method was used as solution method of stress-strain states. ANSYS software was used for solution. Total displacement, contanct pressure between femoral articular surface and meniscus, stress on plate and screws and strain in tibial bone tissue were analysed. Assesment of bone tissue state was made on the basis of Frost's hypothesis.
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BIOMECHANICAL STUDY OF EXTERNAL FIXATORS APPLIED TO TIBIA
Mrázek, Michal ; Horyl, Petr (referee) ; Janíček, Přemysl (referee) ; Florian, Zdeněk (advisor)
External fixators are used in a treatment of complicated fractures and their properties have a crucial impact on treatment quality. Therefore, this thesis is concerned with a biomechanical study of a bone (tibia) with applied external fixators via strain-stress analysis and their comparison with a state of tibia without applied fixator (physiological state). After creating the volume models of geometry of tibia and seven variants of external axial fixators, the corresponding finite element method (FEM) models are created. The analysis of tibia without applied fixator and tibia with all studied fixators is made for three states of load which correspond to characteristic load states during the first stage of treatment. The strain-stress analysis is made using finite element method. Furthermore, the methods of displacement and rotation evaluation during loading are proposed. One can conclude from the results of the strain-stress analysis how the different variants of fixators prevent the displacement and rotation of the bone during the different load states and the comparisons with the physiological state of bone are made. Bone tissue loading is determined from the distribution and the values of the first and the third principal stresses. Finally, comparing the results of all variants the influence of the fixator length, the gap between the fixation elements near the fracture, the number and the setting of the fixation elements on the fixation properties is analysed.
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Stress - strain analysis of inferios limb with fixator type Orthofix
Mrázek, Michal ; Fuis, Vladimír (referee) ; Florian, Zdeněk (advisor)
This diploma thesis aims to create a stress strain analysis of Orthofix external fixator applied to lower limb. The introduction summarizes the background research in available scientific publications, targetting the alternatives of treatment, namely application and fixation solutions of long bones. Furthermore parametric models of the fixator and tibia are created in CAD system CATIA. The fixator model enables to create different geometric variations simulating possible fixator settings and moment load in the range of 1-10 Nm. These geometric and loading states of fixator are solved via FEM in ANSYS. Single versions of the states of Orthofix fixator are then subjected to the stress strain analysis.
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Stress-Strain Analysis of Plate for Fixing a Tibial Fracture Type I per Schatzer's Classification
Filková, Alena ; Valášek, Jiří (referee) ; Marcián, Petr (advisor)
Fractures of the proximal tibia are the most severe intra-articular fractures with subsequent frequent complications. In most cases, the fracture is treated with an inner plate or screws. This diploma thesis focuses on the stress-strain analysis of the plate fixed in the tibia using bone screws. Computational modeling using the finite element method was used to assess the mechanical interaction between the individual elements of this system. For this purpose, it was necessary to conduct a research study dealing with issues involving bone tissue, their damage and subsequent treatment of fractures. Stress-strain analysis was performed for two variants of fixation of this fracture: fixation with an angularly stable plate with screws and fixation with compression lag screws. Furthermore, these analyses were supplemented by their modifications, which represented different levels of these two variants of the computational model. Screws for fixing the plate in the bone tissue were considered both threaded and unthreaded. The interface between the screws and the bone tissue was solved using the Bonded contact and also the Frictionless contact. The influence of these modifications of the computational model on the resulting deformation and stress characteristics was assessed in the evaluation of the results. The mechanical interaction between the elements of this system was assessed in all performed variants.
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Stress-Strain Analysis of Plate for Fixing a Tibial Fracture Type I per Schatzer's Classification
Filková, Alena ; Valášek, Jiří (referee) ; Marcián, Petr (advisor)
Fractures of the proximal tibia are the most severe intra-articular fractures with subsequent frequent complications. In most cases, the fracture is treated with an inner plate or screws. This diploma thesis focuses on the stress-strain analysis of the plate fixed in the tibia using bone screws. Computational modeling using the finite element method was used to assess the mechanical interaction between the individual elements of this system. For this purpose, it was necessary to conduct a research study dealing with issues involving bone tissue, their damage and subsequent treatment of fractures. Stress-strain analysis was performed for two variants of fixation of this fracture: fixation with an angularly stable plate with screws and fixation with compression lag screws. Furthermore, these analyses were supplemented by their modifications, which represented different levels of these two variants of the computational model. Screws for fixing the plate in the bone tissue were considered both threaded and unthreaded. The interface between the screws and the bone tissue was solved using the Bonded contact and also the Frictionless contact. The influence of these modifications of the computational model on the resulting deformation and stress characteristics was assessed in the evaluation of the results. The mechanical interaction between the elements of this system was assessed in all performed variants.
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Stress-Strain Analysis of Plate for Fixing Proximal Tibial Fracture
Votava, Tomáš ; Chamrad, Jakub (referee) ; Marcián, Petr (advisor)
This master thesis is focused on stress-strain analysis of tibia with fixed proximal tibial fracture. Two types of fixation were considered, for each one two variants of solution were made. In the first part of this theses is presented a review of available literature connected with stress-strain analysis of tibia with fixed proximal tibia fracture. Next one is presented a research study of anatomy and biomechanics focused on lower limb. In the last part of research part are presented proximal tibial fractures and way of their fixation. Computational modeling using finite element method was used as solution method of stress-strain states. ANSYS software was used for solution. Total displacement, contanct pressure between femoral articular surface and meniscus, stress on plate and screws and strain in tibial bone tissue were analysed. Assesment of bone tissue state was made on the basis of Frost's hypothesis.
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Case report of physiotherapeutic care of a patient with diagnosis status after intra-articular fracture of the proximal tibia
Vodičková, Kamila ; Michalec, Radim (advisor) ; Jiráň, Jan (referee)
Title: Case report of physiotherapeutic care of a patient with diagnosis status after intra- articular fracture of the proximal tibia Aim: The aim of this bachelor's thesis is processing of the case study of a patient with diagnosis condition after intra-articular fracture of the proximal tibia, a summary of theoretical knowledge, designing therapy and monitoring its progress. Method: This thesis was created as a research with case study during continuous professional practice held from 7.1.2013 to 1.2.2013 at Rehabilitation clinic Malvazinky in Prague. The thesis is divided into two parts - general and special. The first (general) part deals with the theoretical knowledge of kinesiology of the knee joint, includes information on fractures (their classification, possible solutions, healing and complications) and the possibilities of physiotherapy procedures in the postoperative period. The second (special) part describes case study of a patient after intra-articular fracture of the proximal tibia, the process of suggested therapy and evaluation of its effect. Keywords: knee joint, tibia, osteosynthesis, physiotherapy, traumatology, rehabilitation
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Case Study focusing on the physiotherapeutic treatment of a patient with femur and tibia fractures
Hradcová, Veronika ; Kučerová, Ilona (advisor) ; Neuwirthová, Svatava (referee)
Title: A case study focusing on the physiotherapeutic treatement of a patient with femur and tibia fractures Objectives: The goal of the theoretical section is to examine and summarize academic information related to the fracture of femur and tibia including anatomy, fracture diagnosis, traumatology and treatment options. The goal of the practical section is to analyze a case study of a patient suffering from the aforementioned injuries. Methods: The theoretical part is composed of existing academic knowledge related to the diagnosis which includes anatomy, traumatology, diagnostics and treatment possibilities. The practical part was compiled on the basis of work experience in the Rehabilitation Hospital od Beroun between 14th January and 8th February. It is a case study of physiotherapeutic treatment of a patient with femur and tibia fractures, a summary of the treatment as well as an evaluation of the therapy's outcome. Results: The condition of the patient after his rehabilitation programme showed no significant improvement. Reduced range of movement in his knee, which was the main problem improved, but insufficiently. Conclusion: The excercise routine was the key factor in the rehabilitation of the patient. The condition of the patient didn't get significantly better and it is possible that his...
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