Biomechanics Research

KEY FINDING: A 0.5-Hz strain frequency triangular waveform stimulation at 15% strain resulted in fibrillar elastin production, collagen turnover, and a more compliant ECM.

KEY FINDING: The D-C-D model, which uses artificial discs at both adjacent levels, showed the most significant reduction in biomechanical stress compared to other revision surgery models.

KEY FINDING: The software predicted that the subject could increase his walking speed by 60% without increasing his metabolic cost per unit time by modifying existing muscle synergy recruitment.

KEY FINDING: The Pinnacle construct with intact ARTs required the greatest force to achieve dissociation, followed by Plasmafit Plus7 and Allofit-S constructs.

KEY FINDING: The 2mWT is highly correlated with the 6mWT, indicating it measures similar aspects of walking function.

KEY FINDING: Extension (positional reduction) helps restore the normal height and kyphosis of the injured vertebrae, concentrating stress on the upper disc.

KEY FINDING: Increasing spinal shortening distance generally increased stress on internal rods and the range of motion and intradiscal pressure of adjacent segments.

KEY FINDING: Stress concentration in the spinal cord was observed in patients with poor prognosis, aligning with their clinical manifestations of neurological dysfunction. For example, patient a showed stress concentration at the T8-T9 segments, consistent with paraplegia at that level.

KEY FINDING: Increased gluteal muscle stiffness, represented by a higher shear modulus, leads to increased compressive stress, strain energy density, and average von Mises stress within the muscle.

KEY FINDING: Swine and sheep were well-suited for a variety of assessment designs, with treadmill walking and guided free walking offering the most consistency across multiple trials.