Abstract:
The purpose of this study was to evaluate the soft tissue changes in
patients with Class II division 1 malocclusion treated orthodontically with extraction of
two maxillary premolars, and additionally will be evaluated the dental and skeletal
changes resulting from orthodontic treatment. The sample used in this retrospective
study consisted of 68 initial and final cephalograms of 34 patients of both genders
who were treated in specialized courses in orthodontics, in Uningá, Bauru, and the
inclusion criteria was the presence of Class II, division 1 malocclusion, with molar
relationship of at least half-cusp Class II, without crowding or mild degree of
crowding, presence of all permanent teeth erupted up to the first permanent molars,
overjet of at least 5 mm, treated with extractions of the maxillary first premolars and
exclusion of Class II subdivision. To verify the changes resulting from treatment
between initial and final phases, dependent t tests were applied to the cephalometric
variables studied. Based on the sample and the methodology used, the changes
caused by the extraction of two maxillary premolars in Class II division 1
malocclusion were: maxillary retrusion, improvement in maxillomandibular
relationship, increase of lower anterior facial height, retrusion of the maxillary
incisors, buccal inclination, protrusion and extrusion of mandibular incisors, and the
reduction of overbite and overjet. Profile changes were: decrease in facial convexity
and upper lip retrusion.
Key
