Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment
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...
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| Format: | Article |
| Language: | English |
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Dental Press Editora
2015-06-01
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| Series: | Dental Press Journal of Orthodontics |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512015000300064&lng=en&tlng=en |
| _version_ | 1818825052275081216 |
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| author | Bruno Aldo Mauad Robson Costa Silva Mônica Lídia Santos de Castro Aragón Luana Farias Pontes Newton Guerreiro da Silva Júnior David Normando |
| author_facet | Bruno Aldo Mauad Robson Costa Silva Mônica Lídia Santos de Castro Aragón Luana Farias Pontes Newton Guerreiro da Silva Júnior David Normando |
| author_sort | Bruno Aldo Mauad |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-19T00:05:38Z |
| format | Article |
| id | doaj.art-5252fc0d5a214965888f00fbf19a6c6f |
| institution | Directory Open Access Journal |
| issn | 2177-6709 |
| language | English |
| last_indexed | 2024-12-19T00:05:38Z |
| publishDate | 2015-06-01 |
| publisher | Dental Press Editora |
| record_format | Article |
| series | Dental Press Journal of Orthodontics |
| spelling | doaj.art-5252fc0d5a214965888f00fbf19a6c6f2022-12-21T20:46:14ZengDental Press EditoraDental Press Journal of Orthodontics2177-67092015-06-01203646810.1590/2176-9451.20.3.064-068.oarS2176-94512015000300064Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatmentBruno Aldo MauadRobson Costa SilvaMônica Lídia Santos de Castro AragónLuana Farias PontesNewton Guerreiro da Silva JúniorDavid NormandoOBJECTIVE: 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512015000300064&lng=en&tlng=enMá oclusãoArcada dentáriaMandíbulaDesenvolvimento maxilofacial |
| spellingShingle | Bruno Aldo Mauad Robson Costa Silva Mônica Lídia Santos de Castro Aragón Luana Farias Pontes Newton Guerreiro da Silva Júnior David Normando Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment Dental Press Journal of Orthodontics Má oclusão Arcada dentária Mandíbula Desenvolvimento maxilofacial |
| title | Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment |
| title_full | Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment |
| title_fullStr | Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment |
| title_full_unstemmed | Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment |
| title_short | Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment |
| title_sort | changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment |
| topic | Má oclusão Arcada dentária Mandíbula Desenvolvimento maxilofacial |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512015000300064&lng=en&tlng=en |
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