3D-Printed Clear Aligners With Staged Curing for Transparency

The patent applies parameter changes by controlling the curing degree during 3D printing to be between 40-90% (partial curing rather than complete curing). This parameter adjustment allows the resin to maintain workability during post-processing while achieving sufficient transparency in the final product after complete curing. The specific parameter of curing degree becomes a critical control point to balance manufacturing ease and transparency.

The patent implements preliminary action by performing partial curing during the 3D printing process before final completion. This preliminary curing step creates a semi-cured state that facilitates easier post-processing operations such as removal from the mold and finishing, while the remaining uncured resin can be easily removed. The final complete curing is then performed as a separate step to achieve maximum transparency.

The patent applies segmentation by dividing the curing process into two distinct stages: partial curing during 3D printing (achieving 40-90% curing degree) and complete curing after printing. This segmentation allows the first stage to focus on creating sufficient structural strength for handling and post-processing, while the second stage专注于 achieving maximum transparency. The segmentation of curing stages resolves the contradiction between strength and transparency.

The patent implements partial action by intentionally leaving the resin in a partially cured state (40-90% curing) during and immediately after printing, rather than achieving complete curing. This partial curing approach provides sufficient structural strength for post-processing operations while maintaining the advantage of easier workability. The remaining curing is then completed in a controlled post-processing step to achieve both strength and transparency.