Oxygen-mediated projection microstereolithography for sub-100-μm zirconia dental veneers.

Oxygen-mediated projection microstereolithography enables reproducible fabrication of ~80-micrometer zirconia dental veneers with high trueness and improved marginal adaptation despite light scattering and shallow penetration limits.

• Why it matters: Light scattering broadens cured features and limited penetration restricts interlayer bonding, a trade-off that is especially harmful for microscale no-preparation dental veneers.
• What they did: The method uses an oxygen-permeable release film to create an interfacial inhibition field in high-solid-loading zirconia slurry, preferentially filtering low-dose scattered light at pattern edges while preserving curing in the projected core.
• The result: Multilayer printing produced ~80-micrometer veneers with handling-related strength comparable to substantially thicker milled veneers, supporting minimally invasive dental restoration and high-resolution additive manufacturing of strongly scattering ceramic suspensions.

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