title: Intra-oral mandibular sagittal osteotomy technique to correct mandibular distocclusion and mesio-occlusion. Study in canine cadavers.
abstract: Skeletal malocclusions may be due to disturbances in the growth of the mandible or maxilla. In most cases, discomfort is the result of tooth-to-tooth malocclusion or tooth-to-soft-tissue contact. Currently, in veterinary medicine, these problems are treated palliatively. In humans, orthognathic surgery is indicated to correct severe skeletal malocclusions, offering aesthetic and functional benefits to the patients. This research evaluated the effects of an intra-oral mandibular sagittal split osteotomy in 20 dog cadavers with skeletal malocclusion. After sagittal osteotomy and mandibular repositioning, the osteotomies were fixed with titanium mini-plates and 1.5 mm diameter screws or 1.5 mm bicortical screws. The statistical analysis revealed a significant occlusion difference in the treated cadavers (Wilcoxon test, p<0.05). In 19/20 cadavers there was correction of the angular osteotomy while the mandibular alveolar vessels and nerve were preserved during osteotomy and fixation in all cadavers. In conclusion, intra-oral mandible sagittal osteotomy allowed correction of malocclusion in cadavers. However, it would be important to prepare a preoperative orthodontic-surgical treatment plan to obtain a satisfactory occlusion during the surgery in clinical patients.
authors.affiliation: Vanessa Graciela Gomes Carvalho, DMV, MS, PhD, Postdoctorate, Scientific Board director of Brazilian Veterinary Dental Association, R. Barbalha, N.457 - Alto Da Lapa, São Paulo 05083-020, Brazil, Phone: +55 11 2369 7077 or +55 11 99649 3221, E-mail: vanggc@uol.com.br or vanessa@smile4pets.com.br.
authors.forename: V G G
authors.initials: VG
authors.lastname: Carvalho
authors.forename: M A
authors.initials: MA
authors.lastname: Gioso
authors.forename: P E G
authors.initials: PE
authors.lastname: Carvalho
authors.forename: F P
authors.initials: FP
authors.lastname: Cunha
authors.forename: L A V
authors.initials: LA
authors.lastname: Martinez
authors.forename: L S
authors.initials: LS
authors.lastname: Lemos
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D002102:Cadaver; D004285:Dogs / Q000002:abnormalities* / Q000601:surgery*; D008310:Malocclusion / Q000601:surgery / Q000662:veterinary*; D008334:Mandible / Q000601:surgery*; D010027:Osteotomy / Q000379:methods / Q000662:veterinary*
keywords: Orthognathic; dog; malocclusion; mandible; osteotomy