Orthognathic surgery in dogs: intra-oral mandible sagital osteotomy technique to correct prognathism and retrognathism. Study in cadavers / Cirurgia ortognática em cães: técnica intra-oral de osteotomia sagital da mandíbula para correção de prognatismo e retrognatismo. Estudo em cadáveres

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Skeletal malocclusions are growth modifications of the bone of mandible and maxilla that can cause mal positioning of teeth and consequently, loosing or reduction of masticatory function. In most cases, some discomfort can be caused because there is trauma to the teeth or between teeth and soft tissues. Nowadays, in Veterinary Medicine, these traumas have been treated palliativelly because there is not any surgical procedure established to be applied on animals so far. In human dentistry, the orthognathic surgery has been the most indicated treatment by dentists to correct severe skeletal malocclusions, offering esthetic and function benefits to the patients. With the same objective, this research evaluated the viability of the intra-oral mandible sagital split osteotomy in 20 cadavers of dogs with skeletal malocclusion. After sagital osteotomy and repositioning of the mandible, the bone fractures were fixed with titanium mini-plates and screws, with 1.5mm of diameter. The statistic analysis showed a significant difference on occlusion of the treated cadavers (Wilcoxon test, p<0,05); 95% of the cases had a correct sagital split osteotomy (bizel osteotomy), all animals had the lower alveolar vessels and nerve preservation during osteotomy and fixation. Regardless of the fixation method used, 100% of the cases had stable fixation of the fragments. In conclusion, it is viable to accomplish the intra-oral mandible sagital osteotomy in dogs. However, it is important to do a previous orthodontic-surgical planning to acquire a satisfactory oclusal arrangement during the surgery in vivo.

ASSUNTO(S)

orthognathic osteotomia mandíbula ortognatia maloclusão mandible osteotomy cães dogs malocclusion

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