RESUMEN
The aim of this study was to evaluate the linear and angular deviations of the implants installed by the computerized tomography (CT)-guided surgery technique. Eighteen patients who underwent implant insertion by means of CT-guided surgery participated in this study. Ten of these patients had a fully edentulous maxilla, and 8 had a fully edentulous mandible. The patients received a total of 115 implants, of which 81 implants were installed in the maxilla and 34 installed in the mandible. Tomographic guides were made for tomographic examination in both the upper and lower jaws. After the image acquisition, the virtual planning of the positioning of the implants was performed in relation to the previously made prosthesis. The measurement of the linear and angular deviations between the virtual planning and the final position of the implants was performed with the overlap of the planning and postoperative tomography. There were no differences in the linear and angular deviations of the implants installed in the maxilla and mandible. Compared with the coronal region, there was a trend of greater linear deviations in the apical regions of the implants and a greater tendency toward deviations in the posterior regions than in the anterior regions of both arches. The CT-guided surgery promoted the installation of implants with high accuracy and allowed the installation of straight pillars in all cases evaluated. The linear deviations were not different in the different regions of the mouth or in the different portions of the implants.
Asunto(s)
Implantación Dental Endoósea , Implantes Dentales , Arcada Edéntula , Cirugía Asistida por Computador , Diseño Asistido por Computadora , Prótesis Dental de Soporte Implantado , Humanos , Maxilar , Planificación de Atención al Paciente , Estudios Prospectivos , Tomografía Computarizada por Rayos XRESUMEN
O planejamento virtual para cirurgia guiada é uma técnica que vem sendo cada vez mais utilizada na Implantodontia. Sendo assim, o objetivo desse estudo foi realizar uma revisão da literatura sobre a técnica de planejamento virtual para cirurgia guiada sem retalho em reabilitação oral com implantes osseointegráveis, de modo a fornecer informação sobre as características, vantagens e limitações dessa modalidade. Diversos estudos demonstraram a confiabilidade e vantagens da técnica quanto à precisão do planejamento, inserção dos implantes, fabricação da prótese e satisfação do paciente. No entanto, alguns autores relataram que desvios podem ocorrer quanto ao posicionamento dos implantes em relação ao planejamento virtual, o que ressalta a importância da utilização do guia cirúrgico, bem como precisão durante a execução de todas as etapas clínicas e laboratoriais. Concluiu-se que, apesar das limitações relatadas por alguns autores, o método apresenta diversas vantagens que garantem a sua previsibilidade quando indicado e executado corretamente (AU).
The virtual planning for guided surgery has been a widely used technique in Implantology. Thus, the aim of this study was to conduct a literatura review about the virtual planning for flapless guided surgery in oral rehabilitation with dental implants regarding its characteristics, advantages, and limitations. Several studies demonstrated the reliability and advantages of this approach as a consequence of accuracy during treatment planning, implants insertion, prosthesis fabrication, and patient's satisfaction. However, some authors reported deviations of implants positioning compared to the virtual planning, which highlighted the importance of using the surgical guide as well as the accuracy during all clinical and laboratorial steps. Despite of the limitations demonstrated by some authors, it was concluded that this method presents several advantages to enhance its predictability when the procedures are well indicated and performed (AU).
