They are associated with the development of the pharyngeal arches.[2] Approximately, 5% of the UK or USA population present with dentofacial deformities requiring Orthognathic surgery, jaw surgery, and Orthodontics, brace therapy, as a part of their definitive treatment.[3][4][5]
^Harrington C, Gallagher JR, Borzabadi-Farahani A (2015). "A retrospective analysis of dentofacial deformities and orthognathic surgeries using the index of orthognathic functional treatment needs (IOFTN)". Int J Pediatr Otorhinolaryngol. 79 (7): 1063–6. doi:10.1016/j.ijporl.2015.04.027. PMID25957779.
^Borzabadi-Farahani A, Eslamipour F, Shahmoradi M (2016). "Functional needs of subjects with dentofacial deformities: A study using the index of orthognathic functional treatment need (IOFTN)". J Plast Reconstr Aesthet Surg. 69 (6): 796–801. doi:10.1016/j.bjps.2016.03.008. PMID27068664.