Profile changes after class II treatment with twin force appliance in patients with different facial patterns

Abstract

ABSTRACT Objective This study aimed to compare the soft tissue profile changes after treatment with the Twin Force Bite Corrector (TFBC) appliance in patients with different facial patterns. Material and Methods The sample consisted of 42 patients with Class II malocclusion treated orthodontically without extractions and the TFBC. Six patients with balanced facial patterns were excluded from the sample. The sample was then divided into 2 groups: Group 1 (hypodivergent pattern) consisted of 18 patients with a mean initial age of 17.91 years (SD = 7.13), mean final age of 20.45 years (SD = 7.18), and mean treatment time of 2.53 years (SD = 0.93). Group 2 (hyperdivergent pattern) consisted of 18 patients with a mean initial age of 15.87 years (SD = 5.64), mean final age of 18.63 years (SD = 5.79), and mean treatment time of 2.75 years (SD = 0.60).The initial and final lateral cephalograms of each patient were used to measure the soft tissue profile variables. Intergroup comparison was performed by independent t-tests Results There was no statistically significant difference between the soft tissue profile changes with treatment with the TFBC between the hypodivergent and hyperdivergent groups. Conclusion The treatment of the Class II malocclusion with the Twin Force appliance in patients with hypodivergent and hyperdivergent patterns promoted similar changes in the soft tissue profile.