Esthetic perception of facial profile changes after extraction and nonextraction Class II treatment.

This retrospective study evaluated facial profile pleasantness determined by two protocols of Class II treatment. The sample comprised facial profile silhouettes obtained retrospectively from the pretreatment (T1) and posttreatment (T2) cephalograms of 60 patients (42 males and 18 females) divided into two groups. One group of 30 patients (mean age of 12.

Comparison of mechanical properties of beta-titanium wires between leveled and unleveled brackets: an in vitro study.

Background: The objective of this study is to evaluate the force-deflection behavior of beta-titanium alloy wires between two leveled and unleveled bracket alignment scenarios using a three-point bending test.

Methods: Six groups of ten beta-titanium alloy wire segments (0.017 × 0.

Comparison of root resorption between self-ligating and conventional preadjusted brackets using cone beam computed tomography.

Objective: To compare the magnitude of external apical root resorption (EARR) of incisors in patients undergoing the initial phase of orthodontic treatment with two sets of brackets.

Materials And Methods: According to the results of the power analysis for sample size calculation, 19 Angle Class I patients (anterior crowding: 3 to 5 mm; mean age: 20.6 years) were included in the study and randomly divided into two groups: group I (n  =  11, self-ligating brackets) and group II (n  =  8, conventional preadjusted brackets).