Fig. 4From: Treatment of gingival defects with gingival mesenchymal stem cells derived from human fetal gingival tissue in a rat modelTumorigenicity assay of human fetal GMSCs. Human fetal GMSCs subcutaneously inoculated into the backs of nude mice, and grafts observed every 3 days. Continuous observation for 6 months showed no abnormal mass in any of the mice. GMSC gingival mesenchymal stem cellBack to article page