title: Geometry of anterior open bite correction.
abstract: Correction of anterior open bite is a frequently encountered and challenging problem for the craniomaxillofacial surgeon and orthodontist. Accurate clinical evaluation, including cephalometric assessment, is paramount for establishing the diagnosis and appropriate treatment plan. The purposes of this technical note were to discuss the basic geometric principles involved in the surgical correction of skeletal anterior open bites and to offer a simple mathematical model for predicting the amount of posterior maxillary impaction with concomitant mandibular rotation required to establish an adequate overbite. Using standard geometric principles, a mathematical model was created to demonstrate the relationship between the magnitude of the open bite and the magnitude of the rotational movements required for correction. This model was then validated using a clinical case. In summary, the amount of open bite closure for a given amount of posterior maxillary impaction depends on anatomic variables, which can be obtained from a lateral cephalogram. The clinical implication of this relationship is as follows: patients with small mandibles and steep mandibular occlusal planes will require greater amounts of posterior impaction.
authors.affiliation: *Department of Medicine, University of Tennessee Health Science Center, Memphis, TN †Department of Plastic and Reconstructive Surgery, Johns Hopkins Hospital, Johns Hopkins Medical School, Baltimore, MD ‡Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA §Departments of Radiology, Ophthalmology, and Neurosurgery, University of Tennessee Health Science Center ||Le Bonheur Neuroscience Institute, Le Bonheur Children's Hospital, Memphis, TN ¶Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital and Harvard School of Dental Medicine, Boston, MA.
authors.forename: Zachary R
authors.initials: ZR
authors.lastname: Abramson
authors.forename: Srinivas M
authors.initials: SM
authors.lastname: Susarla
authors.forename: Matthew E
authors.initials: ME
authors.lastname: Lawler
authors.forename: Asim F
authors.initials: AF
authors.lastname: Choudhri
authors.forename: Zachary S
authors.initials: ZS
authors.lastname: Peacock
mesh_terms: D000293:Adolescent; D002508:Cephalometry / Q000379:methods*; D005260:Female; D006801:Humans; D008334:Mandible / Q000601:surgery*; D008437:Maxilla / Q000601:surgery*; D024343:Open Bite / Q000175:diagnosis* / Q000601:surgery; D019647:Oral Surgical Procedures / Q000379:methods*