Fig. 1From: Correlation between the efficacy of stem cell therapy for osteonecrosis of the femoral head and cell viabilitya Core decompression. b Intraoperative C-arm fluoroscopy. c Stem cell suspension obtained by centrifugation. d Collagen sponge-cell composites. e Implantation device for collagen sponge-cell composites. f Material implantationBack to article page