Prediction of Maxillary Lateral-Incisor Root Resorption Using Sector Analysis of Potentially Impacted Canines

摘要

Other than the third molars, the maxillary canine is the most frequently impacted tooth in the dental arch. Although the incidence of canine impaction is about 1 in 100 in the general population, the ratio tends to be much higher in an orthodontic practice-perhaps as high as 23.5%, according to one researcher. Palatal impactions are more prevalent (85%) than labial impactions Early detection of impactions is critical to the success of orthodontic treatment. Ericson and Kurol found that the more mesially located the crown of an impacted canine, the lower the likelihood of its eruption after deciduous extraction. Power and Short found that if a canine is angled more than 31deg to the midline, its chance of eruption after deciduous extraction is reduced. Lindauer and