Which type of method shows the best mechanical behavior for internal fixation of bilateral sagittal split osteotomy in major advancements with clockwise rotation? Comparison of four methods.

PURPOSE: The aim of the present study was to evaluate the four methods for bilateral sagittal osteotomy fixation. METHODS: In this study, 56 replicas of whole mandibles made of rigid polyurethane were used. After simulation of major advancement (11 mm) with clockwise rotation of the mandible (6o) in relation to the occlusal plane, the bone segments were fixed with plates and screws of the 2.0-mm system on both the right and left sides: group I, double "H" plate; group II, two mini-plates; group III, "hybrid technique"; and group IV, three bicortical screws in the "inverted L" pattern. The mandibles were submitted to load on the central incisors and right first molar. RESULTS: The mean value of group I was higher than those of groups IV and II in the displacement of 1 mm (F = 4.705; p = 0.010) with load on the incisor. The mean value of group III was higher than those of groups I and II in the displacement of 1 mm (F = 5.166; p = 0.007) and 3 mm (F = 5.166; p = 0.007). The mean value of group IV was higher than that of group II (F = 3.142; p = 0.044) with load on the molar. CONCLUSION: Therefore, after the analyses, the hybrid technique was the one that showed the best results.

Important aspects during advanced lingual laceration management: report of 2 cases / Aspectos importantes para o manejo das lacerações complexas da língua: relato de 2 casos

ABSTRACT Intraoral injuries affect the stomatognathic system, creating difficulties in mastication and speech articulation, especially when they affect the tongue. In this context, the quality of the suture and local care are important to proper recovery and the patient's brief return to their normal functions. Oral lacerations resulting from trauma require specific approaches. Treatments of this type of trauma may primarily be performed by professionals who conduct emergency care; however, they may require the attention of specialists. This article contains recommendations for the primary approach, treatment, and postoperative care of complex lacerations in the tongue.

RESUMO As lesões intraorais afetam o sistema estomatognático, gerando dificuldades na mastigação e na articulação da fala, principalmente quando afetam a língua. Nesse contexto, a qualidade da sutura e o cuidado local são importantes para a recuperação adequada e o breve retorno do paciente às suas funções normais. As lacerações orais resultantes de trauma requerem abordagens específicas. Os tratamentos desse tipo de trauma podem ser realizados principalmente por profissionais que realizam atendimento de emergência; no entanto, eles podem exigir a atenção de especialistas. Este artigo contém recomendações para a abordagem primária, tratamento e cuidados pós-operatórios de lacerações complexas da língua.