BlueCross BlueShield of Tennessee Medical Policy Manual

Orthognathic Surgery


Orthognathic surgery is the surgical correction of abnormalities of the mandible, maxilla, or both. The underlying abnormality may be present at birth, may become evident as an individual grows and develops, or may be the result of traumatic injuries. The severity of these deformities precludes adequate treatment through dental treatment alone.

Orthodontic consultation may be needed to confirm that the surgery is necessary or that an individual can receive improved function with orthodontic therapy alone. Depending on the severity of the deformity, one of the following surgical methods is usually employed: linear osteotomy, sagittal osteotomy, or the complete division of the mandibular body. Teeth may also be moved in any direction, depending on each individual case.

Orthognathic surgery is performed to correct malocclusion, which cannot be improved with routine orthodontic therapy and where the functional impairments are directly caused by the malocclusion. Examples of conditions for which this surgery is used are mandibular prognathism, crossbite, open bite, overbite, underbite, mandibular deformity, and maxillary deformity.

The following surgical procedures would be considered orthognathic surgery: reconstruction of the mandibular ramus, mandibular osteotomy, maxilla osteotomy, and reconstruction of the mandible/maxilla, which are related to function. Osteotomy involves the surgical cutting of the bone to correct the deformity.

Two orthognathic procedures have been used to correct obstructive sleep apnea caused by hypopharyngeal obstruction: the conservative procedure of mandibular osteotomy/genioglossus advancement, in which a small portion of the lower jaw which attaches to the tongue is moved forward, to pull the tongue away from the back of the airway, with hyoid myotomy, movement of the hyoid bone in the neck/suspension (GAHM) and the more aggressive procedure maxillary and mandibular advancement osteotomy (MMO). The surgical concept is to advance the mandible and hyoid bone, which results in advancement of pharyngeal muscles and the base of tongue resulting in expansion of the airway.

Orthognathic surgery has been proposed as a treatment for temporomandibular joint (TMJ) disorder.

NOTE: Pre and/or post-surgical orthognathic surgery related orthodontia (i.e., non-cosmetic orthodontic braces) are considered medically necessary for individuals who meet the Medical Appropriateness criteria, and should not be denied or referred to dental benefits.






Published literature supports the following:

Scientific literature does not support orthognathic surgery for temporomandibular joint dysfunction (TMJ), due to a lack of a cause-and-effect relationship between occlusion and TMJ dysfunction.


Alsulaimani, F. F., Al-Sebaei, M. O., & Afify, A. R. (2013). Surgical orthodontic treatment of severs skeletal class II. Case Reports in Dentistry, 2013, 1-6. (Level 3 evidence)

American Academy of Pediatric Dentistry (AAPD). (1991, revised 2019). Guideline on management of the developing dentition and occlusion in pediatric dentistry. Retrieved April 5, 2021 from

American Academy of Pediatric Dentistry (AAPD). (2010, revised 2020). Guideline on management consideration for pediatric oral surgery and oral pathology. Retrieved April 5, 2021 from

American Academy of Sleep Medicine (AASM). (2009). Clinical guideline for the evaluation, management and long-term care of obstructive sleep apnea in adults. May 27, 2020 from  

American Association of Oral and Maxillofacial Surgeons (AAOMS). (2020). Criteria for orthognathic surgery. Retrieved April 2, 2021 from

American Association of Oral and Maxillofacial Surgeons (AAOMS). (2018). Guidelines to the Evaluation of Impairment of the Oral and Maxillofacial Region. Retrieved June 10, 2019 from

American Cleft Palate-Craniofacial Association. (2018, January). Parameters for evaluation and treatment of patients with cleft lip/palate or other craniofacial anomalies. Retrieved June 10, 2019 from

BlueCross BlueShield Association. Evidence Positioning System. (7:2020). Surgical treatment of snoring and obstructive sleep apnea syndrome (7.01.101). Retrieved April 5, 2021 from (28 articles and/or guidelines reviewed)

Cappellozza, J. A., Guedes, F. P., Filho, H. N., Filho, L. C., & Cardoso, M. (2015). Orthodontic decompensation in skeletal Class III malocclusion: redefining the amount of movement assessed by cone-beam computed tomography. Dental Press Journal of Orthodontics, 20 (5), 28-34. (Level 3 evidence)

Rabie, A. B., Wong, R. W., & Min, G. U. (2008). Treatment in borderline class III malocclusion: Orthodontic camouflage (extraction) versus orthognathic surgery. The Open Dentistry Journal, 2, 38-48. (Level 2 Evidence)

Rachmiel, A., Even-Almos, M., & Aizenbud, D. (2012). Treatment of maxillary cleft palate: Distraction osteogenesis vs. orthognathic surgery. Annals of Maxillofacial Surgery, 2 (2), 127-130. (Level 3 evidence)

Thaler, E. R., Rassekh, C. H., Lee, J. M., Weinstein, G. S., & O’Malley, Jr., B. W. (2016). Outcomes for multilevel surgery for sleep apnea: Obstructive sleep apnea, transoral robotic surgery, and uvulopalatopharyngoplasty. Laryngoscope, 126 (1), 266-269. Abstract retrieved January 20, 2016 from PubMed database.

Yu, H. B., Mao, L. X., Wang, X. D., Fang, B., & Shen, S. G. (2015). The surgery-first approach in orthognathic surgery: a retrospective study of 50 cases.  International Journal of Oral & Maxillofacial Surgery, 44 (2), 1463-1467. (Level 4 evidence)




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