Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment

Detalhes bibliográficos
Autor(a) principal: Mauad,Bruno Aldo
Data de Publicação: 2015
Outros Autores: Silva,Robson Costa, Aragón,Mônica Lídia Santos de Castro, Pontes,Luana Farias, Silva Júnior,Newton Guerreiro da, Normando,David
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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spelling 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
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