The average overall porosity of the porous samples of all groups after the modifications, as estimated by μCT.

The average overall porosity of the porous samples of all groups after the modifications, as estimated by μCT.

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Silicon nitride (Si3N4) is a promising biomaterial, currently used in spinal fusion implants. Such implants should result in high vertebral union rates without major complications. However, pseudarthrosis remains an important complication that could lead to a need for implant replacement. Making silicon nitride implants more bioactive could lead to...