Tooth root regeneration using dental follicle cell sheets in combination with a dentin matrix - based scaffold

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Dental Research

Background:

• Stem cell therapy faces challenges due to low survival rates of implanted cells.
• Tissue-engineered cell sheets can improve stem cell survival.
• Treated dentin matrix (TDM) and dental follicle cells (DFCs) have shown potential for dentinogenesis and tooth root construction.

Purpose of the Study:

• To investigate the use of TDM combined with human dental follicle cell sheets (DFCSs) for root regeneration.
• To analyze the biological characteristics and changes of DFCSs influenced by TDM.

Main Methods:

• Human DFCSs were cultured on TDM scaffolds.
• Biological characteristics were analyzed using electron microscopy, immunofluorescence, immunohistochemistry, and qPCR.
• TDM-DFCS constructs were implanted subcutaneously in mice for in vivo evaluation.

Main Results:

• DFCSs on TDM formed a whirlpool-like alignment with rich extracellular matrix, positive for COLI, integrinβ1, fibronectin, and ALP.
• TDM significantly upregulated DMP-1 and BSP expression in DFCSs, indicating odontogenic and osteogenic potential.
• In vivo, TDM-DFCS implants successfully regenerated new dentin-pulp like tissues and cementum-periodontal complexes.

Conclusions:

• DFCSs combined with TDM demonstrate significant potential for root regeneration.
• This strategy may offer a promising therapeutic approach for treating root or tooth defects and loss.