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Articles 1 - 6 of 6
Full-Text Articles in Medicine and Health Sciences
Acromial Insufficiency Fractures In Reverse Total Shoulder Arthroplasty: A Biomechanical Study, Alicia Kerrigan
Acromial Insufficiency Fractures In Reverse Total Shoulder Arthroplasty: A Biomechanical Study, Alicia Kerrigan
Electronic Thesis and Dissertation Repository
Reverse total shoulder arthroplasty (RTSA) is increasingly utilized in the aging population, with a growing list of surgical indications including rotator cuff tear arthropathy, proximal humerus fractures, and revision arthroplasty. Acromial insufficiency fractures following RTSA are poorly understood, difficult to diagnose, and associated with inferior clinical outcomes. There is limited knowledge in the literature regarding the etiology of post-operative acromial fractures. The purpose of this study is to evaluate the role of implant parameters on acromial strain following RTSA.
Using a cadaveric model, a custom designed modular RTSA system was implanted that allowed for evaluation of modifiable parameters including glenoid …
Revision Total Knee Arthroplasty Using A Novel 3d Printed Titanium Augment: A Cadaveric Biomechanical Study, Charles-Antoine Dion
Revision Total Knee Arthroplasty Using A Novel 3d Printed Titanium Augment: A Cadaveric Biomechanical Study, Charles-Antoine Dion
Electronic Thesis and Dissertation Repository
During revision total knee arthroplasty (rTKA), proximal tibial bone loss is frequently encountered and can result in a less-stable bone-implant fixation. A 3D printed titanium augment that conforms to the irregular shape of the proximal tibia was recently developed. The purpose of this study was to evaluate the fixation stability of rTKA with this augment in comparison to conventional cemented rTKA.
Fixation stability testing was conducted on eleven pairs of thawed fresh-frozen cadaveric tibias (22 tibias) after primary and revision TKA. During the loading protocol, the bone-implant micromotion was measured using a high-resolution optical system.
There was significantly less micromotion …
Wearable Sensors And Total Knee Arthroplasty: Assessing Quantitative Function To Improve The Patient Experience, Megan Fennema
Wearable Sensors And Total Knee Arthroplasty: Assessing Quantitative Function To Improve The Patient Experience, Megan Fennema
Electronic Thesis and Dissertation Repository
Osteoarthritis (OA) is a chronic degenerative disease for which the only long-term solution is total knee arthroplasty (TKA), though many patients are not satisfied with their TKA. Satisfaction in TKA patients is not well understood. Subjective questionnaires and objective functional tests have been previously used to assess TKA outcomes, but both have disadvantages. Wearable sensors have facilitated affordable biomechanical measurement in OA and TKA populations. The objective of this work was to use wearable sensors alongside functional tests with TKA patients to identify quantitative function that related to subjective function and satisfaction. A wearable sensor-setup was validated before implementation in …
Performance Impact Of Different Lower-Limb Setup Positions In The Backstroke Swimming Start, Gordon E. Barkwell
Performance Impact Of Different Lower-Limb Setup Positions In The Backstroke Swimming Start, Gordon E. Barkwell
Electronic Thesis and Dissertation Repository
The performance impact of different knee extension angles in the setup position for a backstroke start was evaluated using an instrumented starting surface. Ten backstroke swimmers completed maximum-effort starts in each of two setup positions: one with the knees flexed, and one with the knees extended. The start handles and touchpad were instrumented with tri-axial force plates. Activity of major hip and knee extensors was measured using surface electromyography. Body position was recorded throughout the start using two high-speed cameras. There was no difference in time to 10 m between the two conditions, indicating there is likely no advantage in …
Design, Development, Manufacturing And Biomechanical Testing Of Stand-Alone Cage For Posterior Lumbar Interbody Fusion, Fahad Alhelal
Design, Development, Manufacturing And Biomechanical Testing Of Stand-Alone Cage For Posterior Lumbar Interbody Fusion, Fahad Alhelal
Electronic Thesis and Dissertation Repository
Introduction: The most common method of spinal fusion includes pedicle screws instrumentation, either with or without interbody cage fusion. This thesis aimed to develop and test a novel stand-alone intervertebral device that eliminates the need for pedicle screws and rods.
Method: The stand-alone cage was designed in collaboration with spinal surgeons and engineers using computer assisting drawings, and manufactured in titanium by 3D printing. Biomechanical testing comparing the stand-alone cage with standard posterior lumbar interbody fusion (PLIF) in sawbones (n=6) and cadavers (n=8).
Result: Compared to PLIF, the stand-alone cage demonstrated no significant difference in range of flexion, lateral bend …
The Development Of A Temporomandibular Force Simulator To Study Craniofacial Strain In-Vitro, Kenneth Kc Ip
The Development Of A Temporomandibular Force Simulator To Study Craniofacial Strain In-Vitro, Kenneth Kc Ip
Electronic Thesis and Dissertation Repository
An in-vitro musculoskeletal loading simulator was developed to replicate the internal forces of mastication, and then employed in a comparison of clinically relevant facial fracture repairs. Muscle forces are simulated by pneumatic pistons via 3D printed mounts that are reverse-engineered from CT scan to match muscle attachment sites, which are adhered to bone in order to simulate native stress distributions. Bite force and bone strain pattern of the craniofacial structure under load were measured using a force sensor and strain gauges respectively. In a series of five fresh-frozen cadaveric heads, it was found that strain patterns of the craniofacial structure …