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Kinematic Analysis Of Gait And Deep Knee Flexion For Pre- And Post-Operative Total Knee Arthroplasty, Samantha Collins
Kinematic Analysis Of Gait And Deep Knee Flexion For Pre- And Post-Operative Total Knee Arthroplasty, Samantha Collins
Electronic Theses and Dissertations
Osteoarthritis (OA) is a form of arthritis that develops in the joint due to overuse and aging causing pain, discomfort, and disability. Total Knee Arthroplasty (TKA) is a surgical procedure performed when OA symptoms are severe with an estimated 600,000 patients in the United States currently receiving TKA. Studies have reported dissatisfaction of the knee for 14-39% of patients. This study collected knee kinematics before and after surgery using stereo radiography for precise measurement of gait and deep knee flexion activities. Results showed healthy knee kinematics were not restored and no significant changes could be seen from OA kinematics in …
Revision Total Hip Femoral Stem Micromotion And Statistical Shape Modeling Of The Knee, William Fugit
Revision Total Hip Femoral Stem Micromotion And Statistical Shape Modeling Of The Knee, William Fugit
Electronic Theses and Dissertations
The first purpose of this thesis was to compare the amount of micromotion seen in the femoral stem in a revision total hip arthroplasty between simple loading conditions and loading conditions derived from activities of daily living, through the use of experimental and computational methods. The amount of micromotion at the bone-implant interface was larger for activities of daily living, with ranges of 200μm more than the largest simple loading conditions. The second purpose of this thesis was to compare measurements of accuracy in a statistical shape model between individual bone and joint-level models, specifically for the knee. Using computational …
Tibial Strains And Tray-Bone Micromotions After Total Knee Arthroplasty: Computational Studies Evaluating The Tibial Fixation, Huizhou Yang
Tibial Strains And Tray-Bone Micromotions After Total Knee Arthroplasty: Computational Studies Evaluating The Tibial Fixation, Huizhou Yang
Electronic Theses and Dissertations
Cemented and cementless fixation in total knee arthroplasty (TKA) have been successfully used for decades. As the number of younger and more active patients treated with TKA continues to increase, long-term implant survivorship is of increasing importance. One of the most common complications and hence the reason for revision is mechanical loosening (23.1% of all revised TKA). The loosening mechanisms have been proposed for different fixation types. For cemented fixation, bone remodeling after surgery is regulated by the changes in strain energy density (SED). The recruitment of osteoclasts and osteoblasts is controlled by SED-related signals. Insufficient stimuli can promote bone …
An Accuracy And Precision Analysis Of The Velys™ Robotic Assisted Solution For Total Knee Arthroplasty, Gary Doan
Electronic Theses and Dissertations
Total knee arthroplasty (TKA) is a procedure where the arthritic surfaces of the knee is removed and replaced with a combination of metal and polymer implants that recreates the joint line to restore function and quality of life. Implant alignment is important in the success of a TKA. Modern day conventional instrumentation can be cumbersome in the operating room and can be inaccurate when resecting bone and aligning implants. Patients with large errors in resections and implant orientation are more prone to experience mechanical failures with their TKA. Mechanical failures in primary TKA require revision surgeries which can lead to …
Knee Balance Assessment During Cementation Is Detrimental To Initial Tka Tibial Tray Fixation, Yashar Ali Behnam
Knee Balance Assessment During Cementation Is Detrimental To Initial Tka Tibial Tray Fixation, Yashar Ali Behnam
Electronic Theses and Dissertations
Despite recent advancements in implant design and cement technique, aseptic tibial loosening remains the primary cause of revision after cemented total knee arthroplasty (TKA) [1]. While the mechanisms of tibial loosening are multifactorial, previous research has shown that third-generation cement techniques, including the use of jet lavage and cement pressurization, can reduce contamination of the implant surface by lipids endogenous to the surrounding cancellous bone and thereby enhance fixation strength between the implant and bone [2]. The purpose of this thesis is to understand the role contaminating lipids play in the mechanism of aseptic loosening and to perform a cadaveric …