Method for obtaining subgingival marginal shape for prosthesis design non-invasively
View Patent ↗The present inventive concept relates to a method for obtaining a subgingival marginal shape for a prosthesis design non-invasively by means of an optical coherence tomography (OCT) scanner for obtaining a subgingival marginal shape and an intraoral scanner for obtaining a tooth surface shape, the method including the steps of: obtaining a surface shape of a prepared tooth by means of the intraoral scanner; obtaining the subgingival marginal shape (crown margin line) of the prepared tooth by means of the OCT scanner; and merging the surface shape of the prepared tooth with the subgingival marginal shape to obtain a final three-dimensional shape of the prepared tooth.
1. A method for obtaining a subgingival marginal shape for a prosthesis design non-invasively by means of an optical coherence tomography (OCT) scanner for obtaining a subgingival marginal shape and an intraoral scanner for obtaining a tooth surface shape, the method comprising the steps of:
obtaining a surface shape of a prepared tooth by means of the intraoral scanner;
obtaining the subgingival marginal shape (crown margin line) of the prepared tooth by means of the OCT scanner; and
merging the surface shape of the prepared tooth with the subgingival marginal shape to obtain a final three-dimensional shape of the prepared tooth,
wherein the step of obtaining the subgingival marginal shape (crown margin line) of the prepared tooth comprises the steps of:
marking margin portions on the slice images of the OCT scanner that are repeatedly retrieved from the first slice position of a prepared tooth area to the last slice position thereof; and
connecting the marked margin portions to form the crown margin line.