Fig. 11

Using Geomagic Control × software, a three-dimensional color deviation map of a mandibular overdenture base superimposed on its definitive master cast. The color scale represents the signed distance (in mm) between the two surfaces. Blue hues (light to dark) indicate negative deviation, where the denture base is positioned inside the cast surface, representing interference or pressure. Yellow to red hues indicate positive deviation, where the denture base is outside the cast surface, representing a gap or space. Green indicates minimal deviation within the defined clinical tolerance zone (± 0.1 mm).