[Value of x-ray computed tomography in topographic exploration of an impacted maxillary third molar]

A case report of impacted maxillary third molar illustrate the limits of panoramic radiograph in topographic approach of Higmore Antrum. The CT scan in duplicate incidence appears in this case like indispensable complement to the standard X-Ray. It accurates the impacted localisation and the proceeding in the surgical treatment.