Avaliação da precisão de uma técnica de planejamento virtual e cirurgia guiada em implantodontia

Abstract

The two biggest trends in surgical specialties are the minimally invasive surgery and computer-guided surgeries. In implantology, these two tendencies are translated into flapless surgery and implant insertion guided by computer. The most used way to transfer the virtual planning of dental implants to the surgical field is stereolithography guides. The aim of this study was to evaluate the accuracy of the transfer of virtual planning to surgical guides in implantology testing a new technique, which uses laboratory-fabricated surgical guides. Eighteen implants and their sleeves were virtually planned in six dried human mandibles based on CT images obtained in a cone-beam device. The transfer of this planning to the surgical guide was performed by a positioning tool of sleeves, which uses data generated by a specific software for Installing rings in surgical guides. A second CT was done of each surgical guide to check the final position of each ring. Comparing the virtual data with the real one made the evaluation of the transfer of virtual planning to the surgical guide. The difference between the planned and the final rings in linear measurements was 0.26 ± 0.16 mm in the buccolingual direction, 0.14 ± 0.12 mm in the mesiodistal direction, and 0.35 ± 0.39 mm in the vertical direction. In angular measures the difference between what was planned and what was actually done was 0.15 ± 0.36 ° in the buccolingual direction and 0.08 ± 0.39 ° in the mesiodistal direction. It was concluded that this new system allows the installation of sleeves in surgical guides precisely based on CT data.