Fig. 1From: Repair of articular cartilage and subchondral defects in rabbit knee joints with a polyvinyl alcohol/nano-hydroxyapatite/polyamide 66 biological composite materialScanning electron microscopy image of the porous biomaterial nano-hydroxyapatite+polyamide 66 (×60) (a x80, b x70, c x60, d x50)Back to article page