AVALIAÇÃO DENTOESQUELÉTICA E TEGUMENTAR DA RETRAÇÃO ANTERIOR EM DUAS FASES

• Ano de defesa: 2012
• Autor(a) principal: Marchiori, Geraldo Eugênio
• Orientador(a): Angelieri, Fernanda
• Banca de defesa: Miranda, André Luis Ribeiro de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Metodista de São Paulo
• Programa de Pós-Graduação: PÓS GRADUAÇÃO EM ORTODONTIA
• Departamento: Ortodontia
• País: BR
• Palavras-chave em Português: Extração dentária; Retração duas fases; Telerradiografia; Ortodontia.
• Palavras-chave em Inglês: Tooth Extraction; Two-step retraction; Cephalogram; orthodontics
• Área do conhecimento CNPq: CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::ORTODONTIA
• Link de acesso: http://tede.metodista.br/jspui/handle/tede/1209

The present study consisted of evaluating dental, skeletal and tegumentary changes promoted by fixed orthodontic treatment with two-step retraction anterior, by means of lateral cephalograms. To this end, we selected 14 patients who required extraction of four premolars, all with Class I malocclusion. The anterior retraction was performed by the retraction of canine (prior to incisors bonding) and of incisors. Twelve patients did not use any device for anchoring. Lateral cephalograms were examined at the beginning and end of canine retraction and by the end of the fixed orthodontic treatment. Cephalograms were scanned to obtain cephalometric measurements using the software Radiocef® (RadiomemoryR- Belo Horizonte, Brazil). Data were submitted to analysis of variance and Tukey s test (p<0.05). Results indicated few skeletal changes, except for a slight retraction of the point A, and increase in mandibular length, in lower-anterior and total facial height, and slight mandibularcounterclockwiserotation due to the craniofacial growth. After canine retraction, there was a lingual inclination and retrusion of upper and lower incisors, which remained stable to the upper incisors at the end of the treatment. In the same period,the lower incisors retruded with a slope similar to the initial. Besides that, no significant loss of anchoring was detected. These dental changes resulted in retrusion of upper and lower lips after canine retraction, and the lower lip continued to retract by the end of the treatment. In conclusion, the treatment using two-step retraction anterior did not lead to a significant loss of anchoring, and reduced the facial convexity.