The airstream escapes through a narrow groove formed in the centre of the tongue, causing friction between the tongue and the alveolar ridge.
The upper lip was viewed in the coronal plane and the alveolar ridge, tooth sockets and point of fusion of primary and secondary palates in the axial plane.
Sounds made with the tongue touching the alveolar ridge while speaking are called alveolar consonants.
If the cleft extends into the maxillary alveolar ridge, the gap is usually corrected by filling the gap with bone tissue.
The maxillary arch receives primary support from the horizontal hard palate and the posterior alveolar ridge crest.
The hard palate is horizontal for up to 1 cm behind the teeth, before suddenly opening upward in a feature known as the alveolar ridge.
Less commonly there may be a single fold, and the lesion may appear on the lingual surface of the mandibular alveolar ridge.
Secondary support for the complete mandibular denture is provided by the alveolar ridge crest.
