Medicine
Khosro Kolahdouzan; Behrooz Nazari
Abstract
Ankle arthroplasty and total ankle arthroplasty are two important treatments for end-stage degenerative ball. Its results on the biomechanics of the medial foot are not sufficient to determine which is better. This study compared the biomechanical parameters of feet treated with ankle arthrodesis, feet ...
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Ankle arthroplasty and total ankle arthroplasty are two important treatments for end-stage degenerative ball. Its results on the biomechanics of the medial foot are not sufficient to determine which is better. This study compared the biomechanical parameters of feet treated with ankle arthrodesis, feet treated with total ankle arthroplasty, and healthy feet using statistical analysis. A validated tripod finite element model was designed to simulate the stance phase of gait. The results showed that total ankle arthroplasty provides more stable plantar pressure distribution than ankle arthrodesis. Among all replacements, the mean scaphoid joint had the highest contact pressure of 3.17 MPa. Surgery does not result in deep subscalar fusion. In both surgical models, an increase was achieved in the maximum metatarsals, especially in the second and third metatarsals. This study allows us to look at the internal biomechanics of foot defects and feet treated with total ankle arthroplasty and ankle arthrodesis during walking.
Medicine
Vahid Fattahi; Mohammad Irajian
Abstract
The term arthroplasty refers to joint replacement through open surgery, which is used for cases where the joint has lost its function and the patient no longer has the ability to perform daily activities in the joint. In patients with knee osteoarthritis (arthrosis), the concentration of hyaluronic acid ...
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The term arthroplasty refers to joint replacement through open surgery, which is used for cases where the joint has lost its function and the patient no longer has the ability to perform daily activities in the joint. In patients with knee osteoarthritis (arthrosis), the concentration of hyaluronic acid in the synovial fluid is lower than the normal value. As a result, by injecting hyaluronic acid (viscosupplementation), the patient's knee pain is reduced and the patient can carry out his daily activities as before. The pain reduction effect of hyaluronic acid injection usually lasts for 3 to 9 months, and after this period, the injection can be repeated up to 2 times. At this time, the surgeon can replace the joint by considering the patient's physical conditions as well as his age and activities. Joint replacement or arthroplasty is one of the methods considered to treat patients with advanced arthritis. Complications after arthroplasty are things that can be reduced by specialized physiotherapy. Many patients will gain appropriate abilities after surgery and recovery in physiotherapy clinics in such a way that they will return to normal conditions in daily activities, but some of them may need to extend the sessions or at least reduce the pain after surgery in different ways. The useful life of the joints depends on their conditions and how their use is different in different people and mainly the joints that bear more weight or those joints that are used more are more exposed to joint damage and destruction such as arthritis. Also, diseases such as rheumatic diseases, metabolic disorders can lead to the destruction of joints and the need for joint replacement. Most of the involved joints include hip and knee, and the incidence of involvement of these two joints is much higher than other joints.
