This product manufactured by Nacional Ossos is a cross-section of the skull, manufactured with mechanical properties similar to human bone (type 2), with absence of teeth 14, 15 and 16. It has a maxillary sinus with septum and flexible membrane. Support block for fixation in a vise for tipping and closing, allowing the student to work with both hands as in a real patient. Ideal for studies, e-learning, surgical practices and hands-on, it can be cut and drilled. It allows the dentist to have a training that is very close to the real thing, empowering himself with respect to Bioethics.