 This is because biocompatibility is not the only factor necessary for successful nerve regeneration; other parameters such as inner diameter, inner microtopography, porosity, wall thickness, and Schwann cell seeding density will need to be examined in future studies in order to improve the results obtained by these collagen I/III gels.Spider silk fibers are shown to promote cellular adhesion, proliferation, and vitality.Allmeling, Jokuszies et al.