Cell survival within pulp and periodontal constructs

Area of Science:

• Biomaterials Science
• Stem Cell Biology
• Regenerative Dentistry

Background:

• Tissue engineering scaffolds are crucial for developing dental regenerative therapies.
• Optimizing cell survival and scaffold integration is key for successful outcomes.
• Dental pulp stem cells (DPSCs) and periodontal ligament stem cells (PLSCs) are promising candidates for dental regeneration.

Purpose of the Study:

• To evaluate cell survival and degradation of DPSCs and PLSCs on different tissue engineering scaffolds.
• To compare the performance of polymer, collagen, and calcium phosphate scaffolds for dental pulp and periodontal applications.

Main Methods:

• DPSCs and PLSCs were seeded onto three scaffold types: D,D-L,L-polylactic acid (polymer), bovine collagen (collagen), and calcium phosphate bioceramic (calcium phosphate).
• Constructs (n=144) were cultured for 3 to 14 days.
• Histologic criteria were used to assess cell survival and scaffold degradation.

Main Results:

• Cell survival was optimal in polymer and collagen scaffolds for both DPSCs and PLSCs.
• Calcium phosphate scaffolds showed reduced cell survival, particularly over longer culture periods.
• Scaffold degradation patterns varied, influencing cell viability.

Conclusions:

• Polymer and collagen scaffolds support superior survival of DPSCs and PLSCs compared to calcium phosphate scaffolds.
• The combination of DPSCs/PLSCs with polymer or collagen scaffolds shows potential for creating effective pulp and periodontal constructs.
• These findings provide a foundation for future in vivo studies and clinical applications in regenerative dentistry.