An in vivo swine study for xeno-grafts of calcium sulfate-based bone grafts with human dental pulp stem cells (hDPSCs)

Mater Sci Eng C Mater Biol Appl. 2015 May:50:19-23. doi: 10.1016/j.msec.2015.01.092. Epub 2015 Jan 31.

Abstract

The purpose of this in vivo study was to evaluate the effect of human dental pulp stem cells (hDPSCs) on various resorbable calcium sulfate/calcium phosphate bone grafts in bone regeneration. Granular particles of calcium sulfate dehydrate (CSD), α-calcium sulfate hemihydrate/amorphous calcium phosphate (α-CSH/ACP), and CSD/β-tricalcium phosphates (β-TCP) were prepared for in vitro dissolution and implantation test. The chemical compositions of specimen residues after dissolution test were characterized by XRD. The ratios of new bone formation for implanted grafts/hDPSCs were evaluated using mandible bony defect model of Lanyu pig. All the graft systems exhibited a similar two-stage dissolution behavior and phase transformation of poor crystalline HAp. Eight weeks post-operation, the addition of hDPSCs to various graft systems showed statistically significant increasing in the ratio of new bone formation (p<0.05). Null hypothesis of hDPSCs showing no scaffold dependence in bone regeneration was rejected. The results suggest that the addition of hDPSCs to calcium sulfate based xenografts could enhance the bone regeneration in the bony defect.

Keywords: Dental implant; Human dental pulp stem cells (hDPSCs); Xeno-grafts.

MeSH terms

  • Animals
  • Bone Transplantation*
  • Calcium Phosphates / pharmacology
  • Calcium Sulfate / pharmacology*
  • Dental Pulp / cytology*
  • Humans
  • Microscopy, Electron, Scanning
  • Osteogenesis / drug effects
  • Stem Cell Transplantation*
  • Stem Cells / cytology*
  • Stem Cells / drug effects
  • Sus scrofa
  • Transplantation, Heterologous*
  • X-Ray Diffraction

Substances

  • Calcium Phosphates
  • amorphous calcium phosphate
  • beta-tricalcium phosphate
  • Calcium Sulfate