Three dimensional movement analysis of maxillary impacted canine using TADs: a pilot study

Abstract

Background The aim of the present study was to compare two different anchorage systems efficiency to disinclude impacted maxillary canines using as evaluation tool superimposed Cone Beam Computed Tomography (CBCTs). Methods The study has been conducted with two parallel groups with an allocation ratio of 1:1. Group test received treatment using as anchorage a miniscrew, control group was treated using an anchorage unit a trans palatal arch (TPA). Both groups received a calibrated traction force of 50 g. CBCT before treatment and 3 months after traction were superimposed and canine tip and root movement were evaluated in mm/month ratio. Results No differences were observed between groups for apex displacement, tip displacement and observation timespan. Twenty-two patients (12 female, 10 male, mean age:13.4 years) undergoing orthodontic treatment for impacted maxillary canines were recruited for this study. No differences were observed between groups for apex displacement, tip displacement and observation timespan. Conclusions The present pilot study provided no evidence that indirect anchorage on miniscrews could make canine disimpaction faster than anchorage on a TPA. An apex root movement of 0.4–0.8 mm per month was found, while average canine tip movement ranged between 1.08 mm and 1.96 mm per month. No miniscrews failures were observed. Trial registration The study reports the preliminary results of the randomized clinical trial registered at www.register.clinicaltrials.gov (registration number: NCT01717417).

Impacted Canine Management Using Aligners Supported by Orthodontic Temporary Anchorage Devices

“…Only such a combination makes it possible to take advantage of the benefits of aligners, described above. According to the study by Magliorati et al comparing the speed of canine traction by using mini-screws and the palatal arch, no significant difference in time was found [23], but slight differences were found between the studied groups with respect to apex displacement and tip displacement.…”

Treatment of Palatally Displaced Canines Using Miniscrews for Direct or Indirect Anchorage: A Three-Dimensional Prospective Cohort Study on Tooth Movement Speed

“…This displacement was assessed and calculated by overlapping the cone beams at T0 and T1. The cone-beam overlap method was the same used in a previously published article [14] and was made possible by using the CMF registration module in SlicerCMF (https://sites.google.com/a/umich. edu/dentistry-image-computing/access, accessed on 1 September 2020) and two other software platforms.…”

“…The sample size estimation calculated that 12 patients would achieve 95% power to detect a mean canine tip displacement difference of 4.3 mm between groups, with an assumed standard deviation of differences of 3.4, and with a significance level (alpha) of 0.05 using a t-test. The sample size calculation was performed on the basis of results from a previous study [14].…”