Permanent maxillary canines are the second most frequently impacted teeth. The prevalence of their impaction is 1-2% in the general population. This is most likely due to an extended development period and the long tortuous path of eruption before the canine emerges into full occlusion. Methods of diagnosis that may allow for early detection and prevention should include a family history visual and tactile clinical examinations by the age of 9-10 years and a thorough radiographic assessment .When the condition is identified early extraction of the maxillary deciduous canines may in specific cases allow the impacted canines to correct their paths of eruption and erupt into the mouth in relatively good alignment. The aim of this article is to summarize current literature about the localization of the impacted canines and the various analysis applicable also to introduce transtomography as a diagnostic tool.