Treatment times of Class II malocclusion: four premolar and non-extraction protocols

Autor(es)

Janson, Guilherme ^[1] ; Valarelli, Danilo Pinelli ^[1] ; Valarelli, Fabricio Pinelli ^[1] ; de Freitas, Marcos Roberto ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Bauru Dent Sch, Dept Orthodont, BR-17012901 Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN JOURNAL OF ORTHODONTICS; v. 34, n. 2, p. 182-187, APR 2012.
• Citações Web of Science: 1

Resumo

The purpose of this study was to retrospectively compare the treatment times of Class II division 1 malocclusion subjects treated with four first premolar extractions or a non- extraction protocol and fixed edgewise appliances. Eighty- four patients were selected and divided into two groups. Group 1, treated with four first premolar extractions, consisted of 48 patients (27 males and 21 females) with a mean age of 13.03 years and group 2, treated without extractions, consisted of 36 patients (18 males and 18 females) with a mean age of 13.13 years. Group 2 was subdivided into two subgroups, 2A consisting of 16 patients treated in one phase and 2B consisting of 20 patients treated in two phases. The initial and final Treatment Priority Index (TPI), initial ages, initial mandibular crowding, and treatment times of groups 1 and 2 were compared with t- tests. These variables were also compared between group 1 and the subgroups with analysis of variance followed by Tukey's tests. The treatment times for groups 1 and 2 and subgroups 2A and 2B were 2.36, 2.47, 2.25, and 2.64 years, respectively, which were not significantly different. Treatment times with non-extraction and four premolar extraction protocols are similar. (AU)

• Processo FAPESP: 04/12445-8 - Estudo comparativo do tempo de tratamento de casos com má oclusão de Classe II tratados ortodonticamente com extrações de quatro pré-molares e sem extrações
• Beneficiário: Danilo Pinelli Valarelli
• Modalidade de apoio: Bolsas no Brasil - Mestrado