Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"Biomechanical testing"”.
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Biomechanical Testing of Two-Level Cervical Disc Arthroplasty
<p>In vitro biomechanical studies comparing two-level cervical disc arthroplasty with two-level fusion were completed using an established cadaveric cervical spine model. Three conditions were tested: non-instrumented, instrumented with two-level fusion (C5-C6 and C6-C7), and instrumented with …
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Biomechanical testing of upright range of motion versus overhead supine range of motion
Rehabilitation of an elbow, following injury, is not a well-studied subject. Clinically, there is not a general consensus on which recovery method is optimal for healing an unstable elbow. When dealing with medial collateral ligament deficiency, many authors have proposed several forearm positions …
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The Development and Application of a Custom Robotic Biomechanical Testing Platform Employing Real-time Load-control to Compare Spinal Biomechanical Testing Protocols: Pure Moment, Ideal Follower Load, and a Novel Trunk Weight Protocol
<p>The human lumbar spine has been the subject of biomechanical study for many decades owing to the numerous medical cases resulting in the development of various corrective surgical procedures and medical devices intended to relieve patient discomfort. Spinal biomechanics is a broad field …
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Use of a Spine Robot Employing a Real Time Force Control Algorithm to Develop, Simulate, and Compare Spinal Biomechanical Testing Protocols: Eccentric Loading, Pure Moment, and a Novel Head Weight Protocol
<p>In vitro testing provides a critical tool for understanding the biomechanics of the subaxial cervical spine. Previous common testing protocols used to evaluate the subaxial cervical spine include Pure Moment (PM), follower load, and eccentric lever arm (EL) loading methods. Although these …
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Design and Evaluation of a Flexible Exoskeleton for Lifting
… mechanisms are described, and the results of biomechanical testing are given. The exoskeleton decreased the erector spinae muscle activity by 21-39.7%.
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A Tale of Two Studies: A Biomechanical Comparison of Extrapelvic and Intrapelvic Fixation for Acetabular Fractures among the Elderly and a Comparison of Dosage Accuracy and Precision for Traditional and Incremental Syringes
… and fixated cadaveric pelvises underwent biomechanical testing to compare the two methods. On average, pelves with intrapelvic plates performed better for all test metrics with statistical significance (p < 0.05) reached for yield force, maximum force, and plastic energy. From these …
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Body scan processing, generative design, and multi-objective evaluation of sports bras : a new design strategy
… requires time-consuming and expensive biomechanical testing. In our search to answer the question: "how do different design properties of sports bras affect their performance?" this research has created and implemented a framework of informed design tools to explore and evaluate the …
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Characterizing the Effects of Histotripsy for Osteosarcoma Treatment on Tendon Structure and Function
… histotripsy on tendon structure and function via biomechanical testing, ultrasound (US) image texture analysis, and histologic analysis. In this ex vivo model, canine extensor tendons collected from medium to large breed dogs are either left untreated (control) or treated indirectly (i.e. the …
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Stability of long multiple-rod constructs and dual-rod constructs in the thoracic spine: a biomechanical cadaveric study
… were instrumented with either a DRC or MRC, and biomechanical testing was then carried out to compare range of motion (ROM) and stiffness between these two constructs. Results demonstrated comparable absolute total ROM and stiffness between DRCs and MRCs, and this was consistent across all …
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Roots adhesion processes in the Mediterranean seagrass Posidonia oceanica
… study aims to clarify the morpho-functional and biomechanical traits driving seedling adhesion to hard substrates, with emphasis on root hairs. An interdisciplinary approach combining experiments, microscopy, biomechanical testing, numerical modelling, and substrate characterization was used to …
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Skeletal muscle biomechanics drives intramuscular transport of locally delivered drugs
… meet the particular design requirements of both biomechanical testing setups and local drug delivery preparations. Studies of intramuscular pharmacokinetics require anatomically physiologic and functionally viable conditions for accurate drug transport. In this study, we invent a method for the …
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Matrix metalloproteinases in the equine systemic inflammatory response: implications for equine laminitis
… of the explants was tested using an Instron biomechanical testing device, and MMP activity in the explants medium was evaluated using zymography. Doxycycline, oxytetracycline, and flunixin meglumine all successfully inhibited equine MMP-9 to varying degrees. However, only doxycycline and …
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Establishing Boundary Conditions for Optimized Reconstruction of Head Impacts
… aspects of friction during head impacts and 2) biomechanically characterizing the head impacts sustained by older adults during falls. This study provides insights into the overall influence of friction during head impacts. It investigates the friction coefficients between the helmet's shell and …
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Impact Biomechanics of the Head and Neck in Football
… football helmets was investigated through impact testing. Little research has been conducted looking at the mandible-chin strap interface in the helmet, and this may be an area of helmet design that can be improved. The research presented in this thesis related to the neck is based on stingers. …
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Biomechanics of the canine thoracolumbar spine in lateral bending
… spinal column may result in alterations of the biomechanical properties of the spine through increases or decreases in the range of motion or stability of the spine. A decrease in range of motion between two adjacent vertebrae subsequent to arthrodesis or ankylosis appears, clinically, to be …
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Wheelchair use in less resourced settings: a study on research quality, wheeled mobility in rural areas, and the user experience in the Lao People's Democratic Republic.
… measures are often defined by physiological and biomechanical testing, while user perception outcomes are generated through feedback assessments, surveys, and interviews. Although the results from this literature suggests a preference toward tested wheelchairs compared to locally manufactured …
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Development of a Biaxial Testing System for Research of Soft Tissue Biomechanics using Laboratory Models
… (0.2 - 2.08 MPa). To this end, we developed a biomechanical testing system that allows us to characterize the material properties of small samples with high accuracy and precision. We built and validated the performance of the instrument’s subsystems (displacement, strain rate, gram-force …
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Investigation of blunt injuries and the force associated with a skull fracture due to impact with a Hopkinson pressure bar : an animal model
… of experimental tests and specimens used in biomechanical testing. A current review on the literature surrounding head impacts is also provided. The research conducted for this minor dissertation uses the Cape (Chacma) Baboon as a model to attempt to simulate cranial blunt trauma observed in …
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Time-dependent mechanical behavior of newly developing matrix of bovine primary chondrocytes and bone marrow stromal cells using Atomic Force Microscopy
… tissue engineered constructs. While the biomechanical testing of the macroscopic tissue would give an overall outcome of multiple interactions involved, the biomechanical study at cellular level might better examine the consequences of such interactions in a more focused manner.
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Disrupting dynamic f-actin enhances skeletal muscle contraction due to mechanical softening
… stabilized f-actin in force transmission. Biomechanical testing at the cell level using AFM and at the tissue level using a micro-tensile test shows a drop in mechanical stiffness that correlates well with a corresponding improvement in muscle force. We ruled out a range of alternate …
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