RESUMO
The success of craniomaxillofacial (CMF) surgery depends not only on the surgical techniques, but also on an accurate surgical plan. The adoption of computer-aided surgical simulation (CASS) has created a paradigm shift in surgical planning. However, planning an orthognathic operation using CASS differs fundamentally from planning using traditional methods. With this in mind, the Surgical Planning Laboratory of Houston Methodist Research Institute has developed a CASS protocol designed specifically for orthognathic surgery. The purpose of this article is to present an algorithm using virtual tools for planning a double-jaw orthognathic operation. This paper will serve as an operation manual for surgeons wanting to incorporate CASS into their clinical practice.
Assuntos
Algoritmos , Simulação por Computador , Anormalidades Maxilofaciais/cirurgia , Procedimentos Cirúrgicos Ortognáticos , Planejamento de Assistência ao Paciente , Pontos de Referência Anatômicos , Cefalometria , Técnica de Moldagem Odontológica , Humanos , Modelos Anatômicos , Cirurgia Assistida por Computador , Tomografia Computadorizada por Raios XRESUMO
Three-dimensional (3D) cephalometry is not as simple as just adding a 'third' dimension to a traditional two-dimensional cephalometric analysis. There are more complex issues in 3D analysis. These include how reference frames are created, how size, position, orientation and shape are measured, and how symmetry is assessed. The main purpose of this article is to present the geometric principles of 3D cephalometry. In addition, the Gateno-Xia cephalometric analysis is presented; this is the first 3D cephalometric analysis to observe these principles.
Assuntos
Algoritmos , Cefalometria , Simulação por Computador , Imageamento Tridimensional , Anormalidades Maxilofaciais/cirurgia , Procedimentos Cirúrgicos Ortognáticos , Pontos de Referência Anatômicos , Técnica de Moldagem Odontológica , Humanos , Modelos Anatômicos , Planejamento de Assistência ao Paciente , Cirurgia Assistida por Computador , Tomografia Computadorizada por Raios XRESUMO
Although 75% of intussusceptions occur within the first two years of life, they can also develop in teenage years. This is a case report of a 13-year old boy with an ileocolorectal intussusception from a large caecal hamartoma (10 x 6 x 2 cm3) adjacent to the ileocaecal valve. Partial resection of the ascending colon and terminal ileum was performed, and the pathology of the resected mass revealed a hamartoma. Ileocolorectal intussusception secondary to hamartoma represents a particularly rare event in the paediatric population. With early surgical intervention, this patient's outcome was uneventful.