ELN and aneurysm: However, no aneurysms or no ruptures were detected,whereas full endothelialization and patency were achieved.32 The rate of degradation needs to come in handwith neotissue formation; enough collagen and elastin need to be depositedto achieve enough mechanical characteristics while the polymer disappears.PCL has long degradation times in vivo (>18 months),33,34 but degradation is influenced by polymer molecular weight, fibersize, porosity, or crystallinity.35