Bidental

Finally, a position of almost bidental contact can be a paralinguistic voice qualifier or secondary articulation we should acknowledge as a dentalization, that is, the articulation of vowels and consonants 'through one's teeth', which can make the labial kinesic component of normal articulation be still present and vary from lip rounding or protrusion with close front vowels to horizontal distension with close back vowels.

Source: wiktionary

dental percussives, produced by clicking maxillary and mandibular teeth together at different speeds, but typically as a bidental chatter, that is, in a repeated rapid way (as in chattering from cold or fear); with bidental percussives resonating in the oral cavity musical notes can be played up and down the scale in various keys.

Source: wiktionary

The convention for transcribing bidental fricatives, suggested in the expIPA chart, uses the appropriate glottal fricative symbol with a dental diacritic both above and below the symbol.

Source: wiktionary

The letter proceeds to state that, besides this monster, there is a great variety of remains of another new order of animals, which Mr. Bain has deginated as bidentals, from their possessing only two teeth, or rather tusks, in the upper jaw, and none whatever in the lower jaw.

Source: wiktionary