Bidental consonants are consonants articulated with both the lower and upper teeth. They are normally found only in speech pathology, and are distinct from interdental consonants such as [n̪͆], which involve the tongue articulated between the teeth rather than the teeth themselves. The diacritic for bidental consonants in the extensions to the IPA is the same superscript plus subscript bridge, ⟨◌̪͆⟩. This is used for three sounds in disordered speech:
- A bidental percussive, [ʭ], produced by striking the teeth against each other (gnashing or chattering the teeth).
- A voiceless bidental fricative, [h̪͆], a fricative made through clenched teeth with no involvement of the tongue or the lips, a "bidental (consonant) produced by air passing through the closed front teeth."
- ([tʰ̪͆] is [t] with bidental aspiration.)
- A voiced bidental fricative, [ɦ̪͆].
|Places of articulation|
There is at least one confirmed attestation of a bidental consonant in normal language. The Black Sea sub-dialect of the Shapsug dialect of Adyghe has a voiceless bidental fricative where other dialects have [x], as in хы