During fricative sounds (such as the 'F' and 'V' sounds), where should the incisal edges of the maxillary anterior teeth contact?

Fricative ('F'/'V') sounds are produced when the maxillary incisal edges lightly contact the wet-dry line of the lower lip; this guides anterior tooth position and length in prosthetics.Other options: The tongue and palate are involved in other sounds (linguoalveolar/palatal); contact with the maxillary lip is not how fricatives are formed.Key exam takeaway: Fricatives (F/V): maxillary incisal edges contact the wet-dry line of the lower lip.