Artigo de periodico

Geometric morphometric analyses of dental arch changes: a 40-year follow-up in patients with initial mild and severe crowding treated with 4 premolar extractions (2025)

• Authors:
  • Gambardela-Tkacz, Caroline Martins
  • Ros, Gabriela de Domênico Alcaraz
  • Cotrin, Paula
  • Bravo Vallejo, Gabriel Eduardo
  • Peloso, Renan Morais
  • Fialho, Tiago
  • Garib, Daniela
  • Astúa, Diego
  • Freitas, Karina Maria Salvatore de
  • Freitas, Marcos Roberto de
• USP affiliated authors: CARREIRA, DANIELA GAMBA GARIB - FOB ; FREITAS, MARCOS ROBERTO DE - FOB ; SILVA, PAULA PATRÍCIA COTRIN DA - FOB ; ROS, GABRIELA DE DOMÊNICO ALCARAZ - FOB ; VALLEJO, GABRIEL EDUARDO BRAVO - FOB ; PELOSO, RENAN MORAIS - FOB ; FIALHO, TIAGO - FOB
• Unidade: FOB
• DOI: 10.1016/j.ajodo.2025.07.013
• Subjects: ARCADA DENTÁRIA; MORFOMETRIA; MALOCLUSÃO; EXTRAÇÃO DENTÁRIA
• Agências de fomento:
  • CNPq / CAPES
• Language: Inglês
• Abstract: Introduction: This research aimed to evaluate changes in dental arch shape during orthodontic treatment and long-term follow-up (T3) in patients treated with 4 premolar extractions because of mild to severe initial dental crowding using the geometric morphometric analysis. Methods: The sample consisted of 32 patients treated with 4 premolar extractions divided into 2 groups according to the Little's irregularity index (LII) at pretreatment (T1; mild or severe crowding). Group mild crowding: 15 subjects with an initial Lll of <=6 mm. Group severe crowding: 17 subjects with an initial Lll of >6 mm. The images from the digital dental models at T1, T2, and T3 were analyzed with principal components analysis and canonical variates analysis on shape variables after a generalized procrustes analysis, to examine intragroup and intergroup arch shape changes at T1, T2, and T3. Results: The principal components analysis revealed that the arch shape variations at T1 were related to the displacement of incisors and canines. At T2, the variations were due to the 4-premolar extractions and anterior retraction. The variation after nearly 40 years was related to both the relapse of anteroinferior teeth and the aging of the occlusion. The arch shape changed with treatment and remained acceptable at T3. The canonical variates analysis illustrated that the maxillary and mandibular shape of dental arches were similar for both groups. Conclusions: Dental arch shape was modified during orthodontic treatment and remained relatively stable at T3 in both groups, despite some degree of relapse and maturational changes in the occlusion.
• Imprenta:
  • Publisher place: Philadelphia, PA
  • Date published: 2025
• Source:
  • Título: American Journal of Orthodontics and Dentofacial Orthopedics
  • ISSN: 0889-5406
  • Volume/Número/Paginação/Ano: v. 168, n. 6, p. 695-704, 2025

Informações sobre o DOI: 10.1016/j.ajodo.2025.07.013 (Fonte: oaDOI API)
• Este periódico é de acesso aberto
• Este artigo NÃO é de acesso aberto
  

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• ABNT

  GAMBARDELA-TKACZ, Caroline Martins et al. Geometric morphometric analyses of dental arch changes: a 40-year follow-up in patients with initial mild and severe crowding treated with 4 premolar extractions. American Journal of Orthodontics and Dentofacial Orthopedics, v. 168, n. 6, p. 695-704, 2025Tradução . . Disponível em: https://doi.org/10.1016/j.ajodo.2025.07.013. Acesso em: 12 fev. 2026.

• APA

  Gambardela-Tkacz, C. M., Ros, G. de D. A., Cotrin, P., Bravo Vallejo, G. E., Peloso, R. M., Fialho, T., et al. (2025). Geometric morphometric analyses of dental arch changes: a 40-year follow-up in patients with initial mild and severe crowding treated with 4 premolar extractions. American Journal of Orthodontics and Dentofacial Orthopedics, 168( 6), 695-704. doi:10.1016/j.ajodo.2025.07.013

• NLM

  Gambardela-Tkacz CM, Ros G de DA, Cotrin P, Bravo Vallejo GE, Peloso RM, Fialho T, Garib D, Astúa D, Freitas KMS de, Freitas MR de. Geometric morphometric analyses of dental arch changes: a 40-year follow-up in patients with initial mild and severe crowding treated with 4 premolar extractions [Internet]. American Journal of Orthodontics and Dentofacial Orthopedics. 2025 ; 168( 6): 695-704.[citado 2026 fev. 12 ] Available from: https://doi.org/10.1016/j.ajodo.2025.07.013

• Vancouver

  Gambardela-Tkacz CM, Ros G de DA, Cotrin P, Bravo Vallejo GE, Peloso RM, Fialho T, Garib D, Astúa D, Freitas KMS de, Freitas MR de. Geometric morphometric analyses of dental arch changes: a 40-year follow-up in patients with initial mild and severe crowding treated with 4 premolar extractions [Internet]. American Journal of Orthodontics and Dentofacial Orthopedics. 2025 ; 168( 6): 695-704.[citado 2026 fev. 12 ] Available from: https://doi.org/10.1016/j.ajodo.2025.07.013

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