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 ⟨m͆ p͆ b͆ f͆ v͆⟩. These are rare cross-linguistically in non-disordered speech, likely due to the prevalence of dental malocclusions (especially retrognathism) that make them difficult to produce, though the voiceless dentolabial fricative [f͆] is used in some of the southwestern dialects of Greenlandic.