Dentolabial consonant

In phonetics, dentolabial consonants are the articulatory opposite of labiodentals: They are pronounced by contacting lower teeth against the upper lip. The diacritic for dentolabial in the extensions of the IPA for disordered speech is a superscript bridge,, by analogy with the subscript bridge used for labiodentals: thus.
These are rare cross-linguistically in non-disordered speech, likely due to the prevalence of dental malocclusions that make them difficult to produce, though the voiceless dentolabial fricative is used in some of the southwestern dialects of Greenlandic.

Dentolabial consonants in the extIPA

The dentolabial consonants listed on the extIPA chart are the following. Complex consonants such as affricates, prenasalized stops and the like are also possible.
The only dentolabial consonant attested in non-disordered speech is the voiceless dentolabial fricative.