Assessment of facial profile changes in Class I biprotrusion adolescent subjects submitted to orthodontic treatment with extractions of four premolars
Dental press j. orthod. (Impr.)
;
17(3): 132-137, May-June 2012. ilus, tab
Article
in English
| LILACS
| ID: lil-646360
ABSTRACT
OBJECTIVE:
To evaluate cephalometric changes in tooth and profile position in young adolescent individuals with Class I biprotrusion submitted to orthodontic treatment with extractions of four first premolars.METHODS:
Pre and posttreatment lateral cephalometric radiographs from 20 patients with Class I biprotrusion malocclusion were used to evaluate the following measurements nasolabial angle, distance from lips to E line, distance from lips, incisors, tip of the nose and soft tissue pogonion to Sy line.RESULTS:
All measurements showed significant changes after treatment (p<0.05), except the distance from lips and soft tissue pogonion to Sy line. There was a positive correlation between the retraction of incisors and the change of upper and lower lips (0.803/0.925; p<0.001).CONCLUSION:
The profile retrusion observed occurred more due to nose growth than to lips retraction. The response from soft tissues to incisors retraction showed a great variability.
Full text:
Available
Index:
LILACS (Americas)
Language:
English
Journal:
Dental press j. orthod. (Impr.)
Journal subject:
Orthodontics
Year:
2012
Type:
Article
Affiliation country:
Brazil
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