Assessment of Lower Dental Arch Changes Resulting from the Treatment of Mild Crowding with Aesthetic Aligner Appliance(A Randomized controlled Clinical trial)

Abstract

Background & Aims: This research aims to evaluate the lower dental arch changes after treatment with Aesthetic Aligner Appliance in comparison with treatment with Conventional Fixed Orthodontic Appliance.

Materials and Methods: This randomized controlled clinical (29 females, 7 males), who have mild crowding in the lower incisors. They were randomly divided into two groups: Aesthetic aligner appliance (experimental group, with mean age of 22.56 ± 3.50 years), and conventional fixed orthodontic appliance (control group, with mean age of 20.89 ± 2.90 years). The values of the curve of Spee, intercanine width, and intermolar width were all evaluated based on dental casts taken at two-time points: T0 (pre-treatment), T1 (after the alignment of the lower anterior teeth).¬¬¬¬¬ Paired Samples t-Test was made to analyze significant differences within each group between time points, and Independent Samples t-Test was conducted to compare the variables measured between the two groups.

Results: The results showed that there was no statistically significant difference between the two groups regarding the value of the curve of Spee after treatment (P = 0.840), while the mean values of the intercanine width and intermolar width after treatment were significantly lower in the experimental group compared to the control group, P = 0.002 for the intercanine width and P < 0.001 for the intermolar width.

Conclusions: The application of aesthetic aligner appliance in the treatment of mild crowding in the lower dental arch was associated with fewer changes in intercanine width and intermolar width after treatment compared to the traditional fixed orthodontic appliance.