ABSTRACT

Objective: To compare with the aid of cone beam CT the effect of treatment with clear aligner versus fixed orthodontic appliances on the external root resorption in upper teeth.

Patients and Methods: Fourteen individuals, aged between 15 and 25, took part in the study. Research randomization was used to assign patients who satisfied the inclusion criteria at random to the aligner and fixed groups.

Results: There were statistical significant differences in root volume and linear measurements of both groups (Paired t-tests were used between T0 and T1). Independent t-tests were used to compare the mean changes of root volumes and linear measurements between the two groups).

Conclusion: There is a significant root resorption in both clear aligner and fixed orthodontic appliance groups. The difference between both groups was statistically insignificant.