The condyle is greatly elevated above the alveolar border; its articular surface is very wide transversely, and narrow and convex from before backwards.
The latter expand in front, and are curved downwards to form the semicircular alveolar border which supports the large incisor teeth.
The horizontal ramus, long, straight, and compressed, gradually narrows towards the symphysis, where it expands laterally to form with the ankylosed opposite ramus the wide, semicircular, shallow alveolar border for the incisor teeth.
This difference is marked in the phonetic differentiation of the dental and the alveolar t by writing them respectively t and t.
The alveolar sound is frequent also in the languages of India, which possess both this and the dental sound.
Associated with this is the strength and sharpness of the lower jaw, the prominence and anterior pcsition of the masseteric ridge, and the depth of the ramus from the alveolar line to the angle.
Both jaws with alveolar teeth.