A method includes receiving first intraoral scan data comprising a first depiction of a dental site comprising a preparation tooth; generating a virtual three-dimensional (3D) model of the dental site using the first intraoral scan data; processing at least one of the first intraoral scan data or data from the virtual 3D model to identify a margin line of the preparation tooth, wherein at least a portion of the margin line is unclear; outputting instructions to generate second intraoral scan data of the dental site depicting the portion of the margin line that is unclear; receiving the second intraoral scan data; and updating the virtual 3D model of the dental site using the second intraoral scan data, wherein the portion of the margin line that was unclear in the virtual 3D model is replaced with information from the second intraoral scan data.