Abstract
OBJECTIVE: Evaluate the facial profile changes of orthodontic treatment with extraction of two upper first premolars, from the perspective of orthodontists, dentists and lay people. METHODS: Facial profiles of radiographs taken before and after treatment of 70 patients with Class II, division 1 malocclusion were traced. The silhouettes of the 70 patients were randomly assembled in an album with, being two profiles on each sheet of the same patient. Then, 30 orthodontists, 30 dentists and 30 lay people chose the more esthetic facial profile (A or B), and the amount of change they perceived between the two profiles before and after treatment, according to a visual analog scale (VAS). RESULTS: The results revealed that 83 examiners preferred the post-treatment profiles, and only three dentists and four lay people chose the profiles pre-treatment more frequently. Thus, the orthodontists often chose the profiles after treatment, followed by dentists, with no statistically significant differences found between dentists and lay people. There were significant differences within groups in the preference of pre- and post-treatment profile. Furthermore, the three groups of evaluators indicated that pre and post-treatment profiles did not differ substantially. CONCLUSIONS: The treatment of Class II, division 1 malocclusion with extraction of two first premolars has a positive effect on facial profile esthetics.
Highlights
The results showed that the three groups of evaluators preferred more often the profiles after orthodontic treatment (Table 2)
5.02 ns ns ns Discussion The evaluation of the changes introduced by orthodontic treatment in the facial profile of patients treated with extraction of two upper first premolars generates considerable interest.[2]
The results revealed that eighty-three evaluators of the three groups preferred the post-treatment profile and only three dentists and four lay people chose the pre-treatment profiles more often
Summary
The sample consisted of 140 lateral cephalograms of 70 young Brazilians of both genders from the collection of the Centro Dental de Almeida Rodrigues - CORA. The lateral cephalometric radiographs were obtained in the same X-ray device before installation and after removal of the appliance. 4) Treated with extraction of two upper first premolars. The 70 patients, 38 females and 22 males with Class II malocclusion, were treated with orthodontic pre-adjusted appliances (Straight Wire) Andrews prescription and 0.022 x 0.030-in slot followed by extractions only in the upper arch (first premolars). The leveling of the dental arches was obtained with nickel titanium wire 0.014-in, 0.016-in, 0.016 x 0.022-in and 0.019 x 0.025-in. After obtaining the lateral radiographs, we proceeded to the preparation of cephalograms and handouts. The soft tissue profile silhouette was traced with a lead pencil on a 0.5 mm HB acetate paper “Ultraphan” 0.07 mm thick and 17.5 mm width and length, adjusted to the radiographs (Fig 1). It was possible to assemble an album with all the silhouettes of the 70 patients
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