Osteoinductive and regenerative potential of premixed calcium‐silicate bioceramic sealers on vascular wall mesenchymal stem cells.

Aim: The osteogenic potential of new premixed calcium‐silicate‐containing bioceramic sealers (Ca‐Si sealers) was tested with porcine vascular wall‐mesenchymal stem cells (pVW‐MSCs). Methodology: Two Ca‐Si‐containing sealers: Ceraseal (MetaBiomed, Cheong‐si, South Korea) and AH Plus Bioceramic (Maruchi, Wonju‐si, South Korea), and an epoxy resin sealer (AH Plus; Dentsply, Konstanz, Germany) as a control, were prepared according to the manufacturers' indications. All samples were allowed to set for 100% of their setting time in a sterile humid cabinet at 37°C and 95% relative humidity. pVW‐MSC seeding efficiency and osteogenic differentiation were analysed as marker of gene/protein expression for up to 12 days. Mineralization assay and immunofluorescence staining were performed and evaluated over a period of 21 days. Statistical analyses were conducted using one‐way analysis of variance (p <.05). Additional samples were prepared and stored under the same conditions and inspected using an environmental scanning electron microscope equipped with an energy dispersive X‐ray spectroscopy system. Results: Significantly higher cell seeding efficiency (p <.05) was observed for both Ca‐Si sealers from day 8. pVW‐MSCs showed a significant shift towards the osteogenic lineage only when seeded in contact with Ca‐Si sealers. Gene expression of osteopontin was upregulated significantly. Collagen I and osteocalcin were clearly expressed by cells in contact with Ca‐Si sealers. Mineralization granules were observed in Alizarin red assays and confocal laser scanning microscopy analysis of both Ca‐Si sealers. No gene expression or granule mineralization were observed on the epoxy resin sealer. Conclusions: Premixed Ca‐Si sealers displayed a higher potential for osteogenic activity on pVW‐MSCs. Epoxy resin sealer was unable to induce any osteogenic activity. The properties of both Ca‐Si sealers suggest their potential as osteoinductive platforms for vascular MSCs in periapical bone. [ABSTRACT FROM AUTHOR]