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Review of methods to determining wear in hip replacements
Zapletal, Jakub ; Vrbka, Martin (referee) ; Ranuša, Matúš (advisor)
This bachelor thesis analysis issues of observation and measurement of wear on hip replacements. First of all there is a description of historical milestones in development of hip prosthesis. Afterwards there is a recherché study of measuring methods and devices, whereas each one of them is reviewed for pros and cons. In the last section these methods are compared and there is an author’s recommendation for the most viable method for observation and measurement of wear on hip prosthesis.
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An analysis of the influence of geometric variability of total hip endoprosthesis shank on stress-strain states in the hip joint
Zýbal, Jan ; Chamrad, Jakub (referee) ; Marcián, Petr (advisor)
This master's thesis deals with stress-strain analysis of hip joint after total hip replacement. These stress-strain states are compared between four variable stems. A research study of available literature is presented with the focus on finite element analysis of hip joints. Basics of hip's joint anatomy is described along with total endoprostheses' variants and properties. Computational modeling was chosen as a solution method using finite element analysis. The solution was executed using ANSYS software. For each stem there was created a computational model which consists of several submodels such as model of geometry, material, contacts and loading. The assesed variables were total hip displacement, contact pressure between the head and liner, stress on each stem and strain on femur. The evaluation of femur's bone tissue was accomplished on basis of Frost's mechanostat in seven Gruen zones.
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A review of hip joint replacements in terms of wear
Vaverka, Pavel ; Ficza, Ildikó (referee) ; Nečas, David (advisor)
This bachelor thesis provides an overview of influence of materials, diametral clearance and head diameter on wear of total hip replacement. First part of the thesis deals evolution of hip joint replacements. Wear measurement methods and commercially available hip joint simulators are described in the following chapter. The main part of this thesis is analysis of important studies dealing with influence of hip replacement design on volumetric wear.
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Obesity and hip joint replacement
SCHRÁNILOVÁ, Monika
The diploma thesis focuses on obesity and hip replacement. Obesity is a disease spread all around the world and the number of people suffering from it has been increasing. It is generally known that obesity increases the risk of several diseases and it causes osteoarthritis of large joints that is often treated by replacing the affected joint. Nowadays, hip alloplasty is one of the most common orthopedic surgeries when the damaged joint socket and head are replaced with an artificial endoprosthesis. Hip replacement is always a serious and burdensome surgery. The aim of the thesis was to describe the approach of patients and nursing staff towards weight reduction before total hip replacement. In the empirical part of the thesis, a qualitative survey was used. The results were obtained through semi-structured interviews of patients who underwent the surgery of total hip replacement and at the same time suffer from obesity. Next, semi-structured interviews with general nurses who take care of these patients were also carried out. The qualitative survey consisted of six survey questions that revealed that patients' approach towards weight reduction is highly individual and influenced by many factors. It also turned out that at clinics, patients are recommended diets and appropriate exercise and general nurses take part in the recommending process by explaining information provided by doctors. One of the barriers considered to be the most common in the care of patients by both staff and patients is high weight and related mobility problems, reduced autonomy and mental stress. An important factor is patients' motivation that is influenced by personality, age and state of mind of both patients and nursing staff. In educational processes, cooperation of a general nurse and a doctor is mostly interconnected. Education is implemented in the whole treatment process where a nurse plays one of the key roles. Early education is essential and it most often takes place in the form of a dialogue adapted to the specific patient. Output of the diploma thesis is a description of possible involvement of nurses in education processes on weight reduction of obese patients before performing total hip replacement.
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An analysis of the influence of geometric variability of total hip endoprosthesis shank on stress-strain states in the hip joint
Zýbal, Jan ; Chamrad, Jakub (referee) ; Marcián, Petr (advisor)
This master's thesis deals with stress-strain analysis of hip joint after total hip replacement. These stress-strain states are compared between four variable stems. A research study of available literature is presented with the focus on finite element analysis of hip joints. Basics of hip's joint anatomy is described along with total endoprostheses' variants and properties. Computational modeling was chosen as a solution method using finite element analysis. The solution was executed using ANSYS software. For each stem there was created a computational model which consists of several submodels such as model of geometry, material, contacts and loading. The assesed variables were total hip displacement, contact pressure between the head and liner, stress on each stem and strain on femur. The evaluation of femur's bone tissue was accomplished on basis of Frost's mechanostat in seven Gruen zones.
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Rehabilitation after Total Hip Replacement
Wong, Steven Chun Tak ; Nováková, Tereza (advisor) ; Mikulášová, Markéta (referee)
Thesis title: Rehabilitation after Total Hip Replacement. Aim: To examine and better understand the human hip joint, coxarthrosis, total hip replacement and the subsequent rehabilitation care. This thesis consists of a case study (special part) and a theoretical part. The subject of the case study is a 71-year-old male patient who underwent a total hip replacement due to coxarthrosis and received physiotherapy after the surgery. The case study is composed of the anamnesis of the patient, and the details of the initial kinesiological examination, final kinesiological examination, and therapeutic procedures the patient underwent. The theoretical part contains basic theoretical knowledge, such as the anatomy and kinesiology of hip joint, clinical details of coxarthrosis, basics of total hip replacement, as well as some typical components of total hip replacement rehabilitation protocols. The patient showed some improvements after the therapy program. The aim of this thesis has been achieved. I began writing this thesis after my completion of an 80-hour clinical placement at the Revmatologický ústav (Institute of Rheumatology) in Prague, Czech Republic, during the period 4th February 2019 to 15th February 2019. Keywords: coxarthrosis, hip osteoarthritis, hip replacement, hip endoprosthesis,...
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A review of hip joint replacements in terms of wear
Vaverka, Pavel ; Ficza, Ildikó (referee) ; Nečas, David (advisor)
This bachelor thesis provides an overview of influence of materials, diametral clearance and head diameter on wear of total hip replacement. First part of the thesis deals evolution of hip joint replacements. Wear measurement methods and commercially available hip joint simulators are described in the following chapter. The main part of this thesis is analysis of important studies dealing with influence of hip replacement design on volumetric wear.
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Review of methods to determining wear in hip replacements
Zapletal, Jakub ; Vrbka, Martin (referee) ; Ranuša, Matúš (advisor)
This bachelor thesis analysis issues of observation and measurement of wear on hip replacements. First of all there is a description of historical milestones in development of hip prosthesis. Afterwards there is a recherché study of measuring methods and devices, whereas each one of them is reviewed for pros and cons. In the last section these methods are compared and there is an author’s recommendation for the most viable method for observation and measurement of wear on hip prosthesis.
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