The wall of the alveolar canal is formed by a cortical fabric halo sseo in way to the fabric alveolar that it is dense. 0ccasionally, no fabric cortical is observed around the nerve, having made it difficult its demonstration. In some patients, the beam to neurovascular has inferior, mesial course and initial, after the mentoniano forame, forming recurrent handle of varied dimensions. According to Tepper et al. (2001), the area enters the mentonianos forames in the jaw is considered the region of choice due to its favorable anatomical conditions and for the rarity of vital complications. Some of the described complications in literature can appear during the preparation of the receiving place, in which the lingual compact bone of the jaw can severely be perforateed. Consequentemente, a vase in the wooden floor of the mouth can be reached, resulting in great edema with acute dispnia e, in the majority of the cases, with a period of latency of many hours. For D' ippolito (2001), the quality of the examination and the report tomographic, as well as its utility, they depend on the correct one and needs focalizao the area interest, that must be specified by the Surgeon Dentist when of the request of the examination.

The plate of bite with hiperdensos markers in the interest place (radiological guide) facilitates and speeds up the accomplishment of the tomographic examination in patients partially indented and minimizes the involuntary mandibular movements in edntulos individuals, reducing the movement devices and improving the communication between the involved specialists. Snows (2001) concluded that the information on the alveolar process, the linking of the cortical sseas and structures that will have to be prevented during the surgery alone will be possible with the images of Computerized Cat scan. The evaluation of the form and contour of the alveolar arches are possible through the images reconstructed in the sagittal plan.