anterior teeth FP

Question 1

how to decide the length of maxillary incisors

Answer 1

cannot be established based on aesthetics alone because the anterior teeth play an impt role in both anterior guidance and phonetics

if length is correct, incisal edges of max incisors should touch the inner edge of the vermillion border (wet-dry line) of the lower lip when making “F” sound

incisal edges of the mandibular incisors are 1mm inferior and 1mm lingual to the incisal edges of the maxillary incisors when making the “S” sound