Hydroxyapatite-tricalcium phosphate (HA-TCP) scaffold is a three-dimensional structure used to support bone regeneration. Ideally, the should be biocompatible, biodegradable, and non-toxic. The tissue engineering technique uses combined stem cell repair defect. To prove non-toxic properties of scaffold, cytotoxicity test needed for human umbilical cord mesenchymal (HUCMSCs). In this study, 27 s...