The Study of Early Stage Osteonecrosis of Femoral Head With Human Umbilical Cord Mesenchymal Stem Cells (19#iSCLife®-ONFH)

Inclusion Criteria: * Ficat classification is I, IIa, or IIb period * no obvious improvement or ingravescence by conservative treatment * patients or their statutory receive human umbilical cord mesenchymal stem cell of their own will, and signed informed consent form Exclusion Criteria: * Ficat classification is third or fourth period * acute, chronic infection patients * combined with heart, lung, kidney disease, and cannot tolerate operation * ankylosing spondylitis patient * acetabular dysplasia patient * with tumor * clinical data deficient * HIV positive * pregnancy or breast feeding women * under other therapy that possibly influence MSC security or efficacy