The Characteristics of Mineral Trioxide Aggregate/Polycaprolactone 3-dimensional Scaffold with Osteogenesis Properties for Tissue Regeneration

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IntroductionThe aim of this study was to investigate whether the mineral trioxide aggregate/polycaprolactone (MTA/PCL) hybrid 3-dimensional (3D) scaffold supplies a suitable microenvironment for the osteogenic differentiation of human dental pulp cells (hDPCs) and to further consider the effect of the MTA/PCL composite on the biological performance of hybrid scaffolds.MethodsMTA was suspended in absolute alcohol and dropped slowly into PCL that was generated with the printable MTA-matrix. Then, the MTA/PCL composite was prepared into highly uniform scaffolds with controlled macropore sizes and structure using a 3D printing technique. Mechanical properties and the apatite precipitation of the scaffolds were evaluated as well as the cell response to the scaffolds by culturing hDPCs.ResultsThe results showed that the MTA/PCL 3D scaffold had uniform, 450-μm, high-porosity (70%) macropores and a compressive strength of 4.5 MPa. In addition, the MTA/PCL scaffold could effectively promote the adhesion, proliferation, and differentiation of hDPCs.ConclusionsThe 3D-printed MTA/PCL scaffolds not only exhibited excellent physical and chemical properties but also enhanced osteogenesis differentiation. All of the results support the premise that this MTA/PCL porous scaffold would be a useful biomaterial for application in bone tissue engineering.HighlightsMineral trioxide aggregate (MTA)/polycaprolactone (PCL) scaffold is fabricated by a 3-dimensional printing technique.MTA/PCL scaffolds could induce the precipitation of apatite spherule aggregates after immersion in simulated body fluid.MTA/PCL up-regulated the osteogenesis of human dental pulp cells.MTA/PCL scaffolds might stimulate mineralized nodule formation and calcium deposition.

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