Rapid preparation and performance of degradable ceramic scaffolds based on stereolithography

Abstract

A simple and systematic research and development process were explained for ceramic additive manufacturing to obtain degradable ceramic scaffolds. First, the degradation rate of calcium silicate/β-tricalcium phosphate ceramics was controlled by adjusting component ratios. After soaking in the simulated body fluid, many cluster-like and silkworm pupa-like apatite deposits were formed on the surface of the prepared ceramic through the dissolution-precipitation process. Meanwhile, the deposition process was summarized. Then, according to the light-curing principle of the ceramic paste, the ceramic paste suitable for stereolithography was studied and prepared by considering three aspects: viscosity, solid content, and single-layer curing depth. Finally, ceramic scaffolds with a uniform structure were prepared by stereolithography, debinding, and sintering in sequence. Compared with the ceramics prepared by pressure forming, the open porosity increased by 8.1%, and the bulk density and flexural strength decreased by 3.83% and 16.11%, respectively.