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CAD and 3D printed models of the four stages of tonsils in accordance with the Brodsky classification. (a) Grade 1 + , (b) Grade 2 + , (c) Grade 3 + and (d) Grade 4 + . Corresponding 3D printed models for the respective grades (e) Grade 1 + , (f) Grade 2 + , (g) Grade 3 + and (4) Grade 4 + . (i-j). Photographs of the measurement setup with the mouth model and the optical arrangement.
