EN
Lingually displaced mandibular canines appear relatively seldom among malocclusions and result in the change of vestibular axial inclination into one parallel to the sagittal plane. This sort of displacement is qualified - besides isolated rotations and frontal or lateral cross-bites - as a class I malocclusion and is prone to treatment provided the etiology is not a hereditary one. Off-genetic factors leading to such a malocclusion may be: persistent deciduous canine - especially in small pedigree dogs, but also in bigger ones - or trauma coinciding with tooth-eruption. In this paper two cases of canine-dislocation have been presented, together with the orthodontic approaches utilized. The importance of early orthodontic intervention in cases of ectopic canines - displaced lingually - was also emphasized as a crucial point for either prevention against mechanical injuries of gingiva and palate or the restoration and retention of dental arch morphology and function.