Fig. 2.

Precision evaluation for the first premolar: Ten color-difference maps (A-J) of scans of the first premolar impression showing fit alignment of digital impression data compared among each other (P_pre1 through P_pre5). Trueness evaluation for the first premolar: Five color-difference maps (K-O) of scans of the first premolar impression showing fit alignment of digital impression data compared with the reference model (P_tru1 to P_tru5). Green represents the exact fit, yellow to red represents a positive discrepancy, and turquoise to blue represents a negative discrepancy.