Fig. 2

CAD pathway in DentalCAD software (Exocad). a: unmatched upper and lower jaws scans and scan of OR; b: initial alignment of the both jaw scans with OR using “three points alignment” protocol and the final alignment with “best-fit protocol”. The deviation of the reference areas ranged between 0 and 0.25 mm, as indicated in the scale; c: aligned scans of upper and lower jaws with OR; d: alignment of OR with the “cheek retractor facial scan” using reference lines on the OR; e: aligned OR with the “cheek retractor facial scan” f: alignment of the “cheek retractor facial scan” with “smile facial scan” using common reference points (chin, eyes, dorsum nasi); g: aligned upper and lower jaw scans embedded into the “smile facial scan” as a result of “d” and “f”; h: the whole dataset was transferred into the Dental System software (3Shape, Copenhagen, Denmark) for the digital design of two dentures