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Photographs showing alteration to the crown length of the central incisors. The alteration was made to the maxillary central incisors, using the incisal edge as a reference point to the highest point of the gingival margin. (a) Central incisor crown length alteration by 0.5 mm increment; (b) 1 mm increment; (c) 1.5 mm increment; (d) 2 mm increment; (e) 2.5 mm and (f) 3 mm increment.
