Fig. 3.

Precision evaluation for the first molar: Ten color-difference maps (A-J) of scans of the first molar impression showing fit alignment of digital impression data compared among each other (M_pre1 through M_pre5). Trueness evaluation for the first molar: Five color-difference maps (K-O) of scans of the first molar impression showing fit alignment of digital impression data compared with the reference model (M_tru1 to M_tru5). Green represents the exact fit, yellow or red represents a positive discrepancy, and turquoise to blue represents a negative discrepancy.