Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Dental Press Journal of Orthodontics |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512015000300064 |
Resumo: | 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. |
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Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatmentMalocclusionDental archMandibleMaxillofacial developmentDental crowding 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. Dental Press International2015-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512015000300064Dental Press Journal of Orthodontics v.20 n.3 2015reponame:Dental Press Journal of Orthodonticsinstname:Dental Press International (DPI)instacron:DPI10.1590/2176-9451.20.3.064-068.oarinfo:eu-repo/semantics/openAccessMauad,Bruno AldoSilva,Robson CostaAragón,Mônica Lídia Santos de CastroPontes,Luana FariasSilva Júnior,Newton Guerreiro daNormando,Davideng2015-07-03T00:00:00Zoai:scielo:S2176-94512015000300064Revistahttp://www.scielo.br/dpjoONGhttps://old.scielo.br/oai/scielo-oai.phpartigos@dentalpress.com.br||davidnormando@hotmail.com2177-67092176-9451opendoar:2015-07-03T00:00Dental Press Journal of Orthodontics - Dental Press International (DPI)false |
dc.title.none.fl_str_mv |
Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment |
title |
Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment |
spellingShingle |
Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment Mauad,Bruno Aldo Malocclusion Dental arch Mandible Maxillofacial development Dental crowding |
title_short |
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_sort |
Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment |
author |
Mauad,Bruno Aldo |
author_facet |
Mauad,Bruno Aldo Silva,Robson Costa Aragón,Mônica Lídia Santos de Castro Pontes,Luana Farias Silva Júnior,Newton Guerreiro da Normando,David |
author_role |
author |
author2 |
Silva,Robson Costa Aragón,Mônica Lídia Santos de Castro Pontes,Luana Farias Silva Júnior,Newton Guerreiro da Normando,David |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Mauad,Bruno Aldo Silva,Robson Costa Aragón,Mônica Lídia Santos de Castro Pontes,Luana Farias Silva Júnior,Newton Guerreiro da Normando,David |
dc.subject.por.fl_str_mv |
Malocclusion Dental arch Mandible Maxillofacial development Dental crowding |
topic |
Malocclusion Dental arch Mandible Maxillofacial development Dental crowding |
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. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512015000300064 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512015000300064 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/2176-9451.20.3.064-068.oar |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Dental Press International |
publisher.none.fl_str_mv |
Dental Press International |
dc.source.none.fl_str_mv |
Dental Press Journal of Orthodontics v.20 n.3 2015 reponame:Dental Press Journal of Orthodontics instname:Dental Press International (DPI) instacron:DPI |
instname_str |
Dental Press International (DPI) |
instacron_str |
DPI |
institution |
DPI |
reponame_str |
Dental Press Journal of Orthodontics |
collection |
Dental Press Journal of Orthodontics |
repository.name.fl_str_mv |
Dental Press Journal of Orthodontics - Dental Press International (DPI) |
repository.mail.fl_str_mv |
artigos@dentalpress.com.br||davidnormando@hotmail.com |
_version_ |
1754122397259137024 |