Regeneration of dentin-pulp complex by using dental pulp stem cells in dog

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Dental Research

Background:

• Missing teeth significantly impact daily life quality.
• Stem cells are crucial for tissue generation and maintenance.
• Scaffolds have evolved into bioactive matrices for inducing cellular behavior.

Purpose of the Study:

• To investigate the potential of regenerating the dentin-pulp complex.
• To evaluate the efficacy of dental pulp stem cells (DPSCs) in regeneration.
• To assess regeneration in an animal model.

Main Methods:

• Dental pulp stem cells (DPSCs) were extracted and cultivated.
• Ten scaffold types were fabricated using platelet-rich plasma (PRP), cancellous bone, and collagen.
• Scaffolds were implanted in dogs' mouths, with removal after 4 months.

Main Results:

• Collagen scaffolds showed no cell differentiation or new structure formation.
• The combination of bone scaffolds with PRP or DPSCs resulted in dentin-pulp complex regeneration.
• Microscopic examination confirmed new tissue formation in successful models.

Conclusions:

• Bone scaffolds combined with PRP or DPSCs facilitate dentin-pulp complex regeneration in dogs.
• This combination promotes odontoblastic and pulpal differentiation.
• Formation of predentin and tubular dentin was observed, indicating successful regeneration.