Impact of connector geometry and reinforcement zone on the radial mechanical properties and crimping behavior of poly(L-lactic acid) vascular stents

This study aims to develop an anisotropic Poly(L-lactic acid) (PLLA) vascular stent model to address its mechanical performance limitations in clinical applications. The effects of the connector length-to-support ring length ratio (L/H) and the connector width-to-support ring width ratio (T2/T1) on the radial mechanical properties and crimping morphology of the stent are quantified. A design strategy incorporating reinforcement zones within the stent is proposed. Results show that adjusting L/H and T2/T1 ratios enhances radial performance and crimping morphology, while connector reinforcement zones improve stent performance, offering valuable insights for PLLA stent design.