A New Method to Move Mandible to Intercuspal Position in Virtual Three-Dimensional Orthognathic Surgery by Integrating Primary Occlusion Model

Point-based superimposition of a digital dental model on to a three-dimensional computed tomographic skull: an accuracy study in vitro

“…For one single superimposition, an error of 0.5 mm was clinically acceptable, but both the upper and lower teeth had to be superimposed so the error might be doubled to 1 mm, and an error of 1 mm would cause a problem in occlusion. Our team reported a possible solution, 14,15 which was scanning a centric relation (CR) and superimposing the maxilla and mandible on the scanned teeth. This guaranteed the occlusion as well as the mandible at the centric relation point, another critical factor in orthognathic surgery.…”

Effective use of simple computer programmes and clay models to demonstrate the planning and operative steps for teaching and presentations

“…Clinical photographs and scientific presentations have undergone major changes in the recent past. [ 2 ] With widespread availability of the user-friendly gadgets such as digital cameras and mobile phones, improved optics, ease of transferring, processing and storing images, use of high-quality images for presentations has become a standard practice. [ 1 7 8 ] Although on one side the instrumentation is improving, it is not immune to data loss.…”

“…Unless the photographs and videos are obtained in a standard manner and the data are stored carefully, retrieving good quality images at short notice becomes difficult. Three-dimensional image reconstruction as computer-assisted designing in craniofacial and orthognathic surgical planning[ 1 2 ] and software programmes to create pre- and post-operative images for aesthetic procedures are currently in use. Generally, these techniques use highly, sophisticated software programmes that are expensive and need trained professionals for handling them.…”

Comparação em meio digital entre os eixos transversais horizontais mandibulares definidos anatomicamente e por axiografia

“…Assim, um relato técnico introduziu um novo método para mover a mandíbula com precisão a partir da abertura da boca de volta para o MIH, pela integração dos modelos de gesso pré-operatórios. Os autores concluíram que o método descrito foi uma tentativa cuidadosa para enfrentar e resolver um problema real dentro do planejamento 3D, que a precisão das superfícies dentárias obtidas a partir de um escâner de superfície a laser é maior do que a partir das imagens de CT e que pesquisas adicionais são necessárias para validar a precisão deste protocolo, que é esperado para melhorar a precisão da cirurgia ortognática 3D virtual 77. Bai8 ilustrou uma nova técnica para o posicionamento da maxila em cirurgia ortognática com utilização de guias CAD/CAM associado a placas de fixação pré dobradas.…”