Mesenchymal stem cells promote hard-tissue repair after direct pulp capping

Area of Science:

• Regenerative Dentistry
• Biomaterials Science
• Stem Cell Therapy

Background:

• Direct pulp capping aims to preserve pulp vitality and promote dentin bridge formation.
• Autologous mesenchymal bone marrow stem cells (BMSCs) are being explored as a regenerative approach for pulp repair.

Purpose of the Study:

• To evaluate the efficacy of autologous BMSCs in promoting hard-tissue formation following direct pulp capping.
• To compare the regenerative potential of BMSCs with established materials like mineral trioxide aggregate (MTA) and hydroxyapatite/tricalcium phosphate.

Main Methods:

• Mesenchymal BMSCs were isolated from canine iliac crests and cultured.
• Direct pulp capping was performed on canine posterior teeth using BMSCs, MTA, or hydroxyapatite/tricalcium phosphate.
• Radiographic (cone-beam computed tomography) and histologic analyses were conducted after 3 months to assess hard-tissue barrier formation.

Main Results:

• Both BMSCs and MTA demonstrated significant hard-tissue barrier formation.
• The calcific barrier formation with BMSCs was comparable to that achieved with MTA.
• Hydroxyapatite/tricalcium phosphate showed significantly less hard-tissue formation compared to BMSCs and MTA (P < .05).

Conclusions:

• Autologous mesenchymal BMSCs are a viable option for promoting hard-tissue formation in direct pulp capping procedures.
• BMSCs exhibit comparable regenerative potential to MTA for pulp repair, offering a promising alternative in regenerative dentistry.