Values and property charts for anisotropic freeze-cast collagen scaffolds for tissue regeneration.

Presented in this article are systematic microstructural and mechanical property data for anisotropic collagen scaffolds made by freeze casting. Three applied cooling rates (10 °C/min, 1 °C/min, 0.1 °C/min) and two freezing directions (longitudinal and radial) were used during scaffold manufacture. Utilizing a semi-automated image analysis technique applied to confocal micrographs of fully hydrated scaffolds, pore area, long and short pore axes, and pore aspect ratio were determined. Compression testing was performed to determine scaffold modulus, yield strength, and toughness.