Please use this identifier to cite or link to this item:
Title: Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment
Keywords: Tratamento odontológico
Ortodontia corretiva
Alinhamento dentário
Issue Date: Jun-2015
Publisher: Universidade Federal do Pará
Citation: MAUAD, Bruno Aldo et al. Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment. Dental Press Journal Orthodontics, Maringá, v. 20, n. 3, p. 64-68, mai./jun. 2015. Disponível em: <>. Acesso em: 16 jun. 2017. <>.
Abstract: Objective: The aim of this longitudinal study, comprising young adults without orthodontic treatment, was to assess spontaneous changes in lower dental arch alignment and dimensions. Methods: Twenty pairs of dental casts of the lower arch, obtained at different time intervals, were compared. Dental casts obtained at T1 (mean age = 20.25) and T2 (mean age = 31.2) were compared by means of paired t-test (p < 0.05). Results: There was significant reduction in arch dimensions: 0.43 mm for intercanine (p = 0.0089) and intermolar (p = 0.022) widths, and 1.28 mm for diagonal arch length (p < 0.001). There was a mild increase of approximately 1 mm in the irregularity index used to assess anterior alignment (p < 0.001). However, regression analysis showed that changes in the irregularity index revealed no statistically significant association with changes in the dental arch dimensions (p > 0.05). Furthermore, incisors irregularity at T2 could not be predicted due to the severity of this variable at T1 (p = 0.5051). Conclusion: Findings suggest that post-growth maturation of the lower dental arch leads to a reduction of dental arch dimensions as well as to a mild, yet significant, increase in dental crowding, even in individuals without orthodontic treatment. Furthermore, dental alignment in the third decade of life cannot be predicted based on the severity of dental crowding at the end of the second decade of life
ISSN: 2177-6709
Appears in Collections:Artigos Científicos - FOUFPA/ICS

Files in This Item:
File Description SizeFormat 
Artigo_ChangesLowerDental.pdf556,88 kBAdobe PDFView/Open

This item is licensed under a Creative Commons License Creative Commons