Treatment Time of Class II Malocclusion, with and without Mandibular Crowding, Treated with Four Premolar Extractions: A Retrospective Study

Autor(es)

Janson, Guilherme ^[1] ; Bastos Curty Silva, Lucas Nunes ^[1] ; Valerio, Marcelo Vinicius ^[1] ; Laranjeira, Vinicius ^[1] ; Niederberger, Ana ^[1] ; Garib, Daniela ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Vila Univ, Bauru Dent Sch, Dept Orthodont, Alameda Dr Octavio Pinheiro Brisolla, Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: TURKISH JOURNAL OF ORTHODONTICS; v. 34, n. 2, p. 122-126, JUN 2021.
• Citações Web of Science: 0

Resumo

Objective: This study aimed to compare the treatment times in patients with complete bilateral Class II malocclusion, with and without mandibular crowding, treated with 4 premolar extractions. Methods: The sample comprised 57 retrospectively and consecutively selected patients (30 male, 27 female) treated for initial Class II malocclusion, divided as follows: Group 1 consisted of 23 patients (11 males, 12 females; mean age 13.13 years) presenting no crowding or 3 mm at most. Group 2 consisted of 34 patients (19 males, 15 females; mean age 13.06 years) presenting more than 4 mm of crowding. Crowding was manually measured in the initial dental casts. The Objective Grading System (OGS) index was manually measured in the final dental casts and radiographic images. The groups were comparable regarding initial age, gender distribution, and final occlusal statuses. The treatment times between the groups were compared using the t-test. Correlation between crowding and treatment time was evaluated with Pearson correlation coefficient. Results: Treatment times between the 2 groups were similar (P = .890) and there was no significant correlation between the amount of crowding and treatment time (r = 0.04, P = .760). Conclusion: Treatment times for complete Class II malocclusion with and without mandibular crowding, treated with 4 premolar extractions, are similar. (AU)

• Processo FAPESP: 11/16495-3 - Estudo comparativo do tempo de tratamento em pacientes com e sem apinhamento nos casos de má oclusão Classe II tratados com extrações de quatro pré-molares.
• Beneficiário: Lucas Nunes Bastos Curty Silva
• Modalidade de apoio: Bolsas no Brasil - Mestrado