Abstract :
Aim and Objective: To evaluate the root-crown ratio and volumetric changes in teeth adjacent to impacted maxillary canine and to correlate with the severity of impaction.Background: There are limited studies that have assessed the differences in the root-crown ratios and volumes of teeth adjacent to maxillary canines that are impacted. Also, these dimensional changes have not been correlated to the severity of impaction.Materials and Methods: Forty pre-treatment CBCT scans of patients with unilateral maxillary canine impaction were included in this cross-sectional study. The contralateral teeth on the non-impacted side were taken as control. CS Imaging and ITK-SNAP softwares were used to assess the root-crown ratios and volumes, respectively. KPG Index was utilized to assess the severity of canine impaction. The root-crown ratio and volumetric changes of the adjacent teeth were correlated with the cumulative KPG score.Results: The teeth adjacent to the impacted maxillary canine showed a significant decrease in the root-crown ratio and volume. Positive correlation was observed in the Easy, Moderate, and Difficult categories for the change in root-crown ratio and volumes of central incisors, lateral incisors and first premolars. Extremely Difficult category was positively correlated to central incisors, and negatively correlated to the lateral incisors and first premolars.Conclusion: The root-crown ratios and volumes of adjacent teeth on the impaction side was lower as compared to the non-impaction side and is affected by the Easy, Moderate and Difficult categories of KPG Index.
Keyword :
Resorption, Impaction, CBCT, Volume, Root-crown ratio, KPG Index, ITK Snap