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Assessment of facial profile changes in Class I biprotrusion adolescent subjects submitted to orthodontic treatment with extractions of four premolars
Mattos, Claudia Trindade; Marquezan, Mariana; Chaves, Isa Beatriz Barroso Magno; Martins, Diogo Gonçalves dos Santos; Nojima, Lincoln Issamu; Nojima, Matilde da Cunha Gonçalves.
  • Mattos, Claudia Trindade; UFRJ.
  • Marquezan, Mariana; UFRJ.
  • Chaves, Isa Beatriz Barroso Magno; UFRJ.
  • Martins, Diogo Gonçalves dos Santos; UFRJ.
  • Nojima, Lincoln Issamu; UFRJ.
  • Nojima, Matilde da Cunha Gonçalves; UFRJ.
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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Full text: Available Index: LILACS (Americas) Language: English Journal: Dental press j. orthod. (Impr.) Journal subject: Orthodontics Year: 2012 Type: Article Affiliation country: Brazil