Retrospective analysis of orthodontic treatment outcomes and its relation to postretention stability
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of applied oral science (Online) |
Texto Completo: | https://www.revistas.usp.br/jaos/article/view/3394 |
Resumo: | OBJECTIVE: The present study was designed to retrospectively evaluate Class I malocclusion cases treated with extraction of the four first premolars, aiming to establish the relationship between the quality of orthodontic treatment outcomes and the long-term occlusal stability. MATERIAL AND METHODS: The sample comprised 94 patients of both genders, presenting Class I malocclusion, treated with extractions of the four first premolars and Edgewise mechanics. All the patients selected were whites, being 50 males and 44 females. The mean pretreatment age was 13.46 years (s.d. 1.8). The mean treatment time was 2.09 years (s.d. 0.58), the mean retention time was 1.63 years (s.d. 0.73) and the mean time of postretention evaluation was 5.31 years (s.d. 1.61). The dental casts were measured at pretreatment (T1), posttreatment (T2) and postretention (T3), by the PAR index and by the Little irregularity index, and the correction due to treatment (T1-2) and the change at the postretention period (T3-2) were calculated. The descriptive statistics was performed and the Pearson correlation coefficient was applied for the PAR and the Little indices in the total sample, among the times evaluated. RESULTS: The mean PAR reduction due to treatment was 78.54%, and 66.6%, at the postretention stage related to pretreatment stage. Significant correlations were found for the PAR index at the times evaluated, except between T1 and T2 and between T1-2 and T3. In other words, the higher the treatment correction (T1-2), the lower the posttreatment PAR index (PAR T2) will be, and the higher will be the PAR change at the postretention period (PAR T3-2). Also, the higher the posttreatment PAR score (PAR T2), the higher will be the postretention PAR score (PAR T3). CONCLUSION: It was concluded that the quality of orthodontic treatment outcomes is not related to the long-term occlusal stability. |
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Retrospective analysis of orthodontic treatment outcomes and its relation to postretention stability Análise retrospectiva dos resultados dos tratamentos ortodônticos e sua relação com a estabilidade pós-contenção Resultado de tratamentoRecidivaOrtodontiaTreatment outcomesRecurrenceOrthodontics OBJECTIVE: The present study was designed to retrospectively evaluate Class I malocclusion cases treated with extraction of the four first premolars, aiming to establish the relationship between the quality of orthodontic treatment outcomes and the long-term occlusal stability. MATERIAL AND METHODS: The sample comprised 94 patients of both genders, presenting Class I malocclusion, treated with extractions of the four first premolars and Edgewise mechanics. All the patients selected were whites, being 50 males and 44 females. The mean pretreatment age was 13.46 years (s.d. 1.8). The mean treatment time was 2.09 years (s.d. 0.58), the mean retention time was 1.63 years (s.d. 0.73) and the mean time of postretention evaluation was 5.31 years (s.d. 1.61). The dental casts were measured at pretreatment (T1), posttreatment (T2) and postretention (T3), by the PAR index and by the Little irregularity index, and the correction due to treatment (T1-2) and the change at the postretention period (T3-2) were calculated. The descriptive statistics was performed and the Pearson correlation coefficient was applied for the PAR and the Little indices in the total sample, among the times evaluated. RESULTS: The mean PAR reduction due to treatment was 78.54%, and 66.6%, at the postretention stage related to pretreatment stage. Significant correlations were found for the PAR index at the times evaluated, except between T1 and T2 and between T1-2 and T3. In other words, the higher the treatment correction (T1-2), the lower the posttreatment PAR index (PAR T2) will be, and the higher will be the PAR change at the postretention period (PAR T3-2). Also, the higher the posttreatment PAR score (PAR T2), the higher will be the postretention PAR score (PAR T3). CONCLUSION: It was concluded that the quality of orthodontic treatment outcomes is not related to the long-term occlusal stability. OBJETIVO: O presente estudo objetivou analisar retrospectivamente casos com má oclusão de Classe I tratados com extrações dos quatro primeiros pré-molares, visando estabelecer a relação da qualidade dos resultados dos tratamentos ortodônticos e a estabilidade em longo prazo. MATERIAL E MÉTODOS: A amostra consistiu de 94 pacientes de ambos os gêneros, apresentando má oclusão de Classe I, tratados com extrações dos quatro primeiros pré-molares e mecânica Edgewise. Todos os pacientes selecionados eram leucodermas, sendo 50 do gênero masculino e 44 do feminino. A idade inicial média foi de 13.46 anos (d.p. 1.8). O tempo de tratamento médio foi 2.09 anos (d.p. 0.58), o tempo médio de contenção foi 1.63 anos (d.p. 0.73) e o tempo médio de avaliação pós-contenção, 5.31 anos (d.p.1.61). Foram medidos, nos modelos de estudo, o índice PAR e o índice de irregularidade de Little, nas fases pré (T1), pós-tratamento (T2) e pós-contenção (T3), e calculou-se a quantidade de correção com o tratamento (T1-2) e de alteração no período pós-contenção (T3-2). Realizou-se a estatística descritiva e o coeficiente de correlação de Pearson foi aplicado entre os índices estudados e os tempos avaliados. RESULTADOS: A média de redução do índice PAR da amostra total com o tratamento foi de 78.54%, e na fase pós-contenção, de 66.6%, com relação ao inicial. Houve correlação significante para o índice PAR nos tempos estudados, exceto entre T1 e T2 e entre T1-2 e T3. Ou seja, quanto maior a correção do tratamento (T1-2), menor será o índice PAR final (PAR T2), e maior a alteração no período pós-contenção (PAR T3-2). E quanto maior o índice PAR pós-tratamento (PAR T2), maior o índice PAR pós-contenção (PAR T3). CONCLUSÃO: Concluiu-se que a qualidade dos resultados dos tratamentos ortodônticos não está relacionada à estabilidade oclusal em longo prazo. Universidade de São Paulo. Faculdade de Odontologia de Bauru2006-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/339410.1590/S1678-77572006000500005Journal of Applied Oral Science; Vol. 14 No. 5 (2006); 324-329 Journal of Applied Oral Science; Vol. 14 Núm. 5 (2006); 324-329 Journal of Applied Oral Science; v. 14 n. 5 (2006); 324-329 1678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/3394/4084Copyright (c) 2006 Journal of Applied Oral Scienceinfo:eu-repo/semantics/openAccessFreitas, Karina Maria Salvatore deFreitas, Marcos Roberto deJanson, GuilhermePinzan, ArnaldoHenriques, José Fernando Castanha2012-04-27T11:54:57Zoai:revistas.usp.br:article/3394Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2012-04-27T11:54:57Journal of applied oral science (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Retrospective analysis of orthodontic treatment outcomes and its relation to postretention stability Análise retrospectiva dos resultados dos tratamentos ortodônticos e sua relação com a estabilidade pós-contenção |
title |
Retrospective analysis of orthodontic treatment outcomes and its relation to postretention stability |
spellingShingle |
Retrospective analysis of orthodontic treatment outcomes and its relation to postretention stability Freitas, Karina Maria Salvatore de Resultado de tratamento Recidiva Ortodontia Treatment outcomes Recurrence Orthodontics |
title_short |
Retrospective analysis of orthodontic treatment outcomes and its relation to postretention stability |
title_full |
Retrospective analysis of orthodontic treatment outcomes and its relation to postretention stability |
title_fullStr |
Retrospective analysis of orthodontic treatment outcomes and its relation to postretention stability |
title_full_unstemmed |
Retrospective analysis of orthodontic treatment outcomes and its relation to postretention stability |
title_sort |
Retrospective analysis of orthodontic treatment outcomes and its relation to postretention stability |
author |
Freitas, Karina Maria Salvatore de |
author_facet |
Freitas, Karina Maria Salvatore de Freitas, Marcos Roberto de Janson, Guilherme Pinzan, Arnaldo Henriques, José Fernando Castanha |
author_role |
author |
author2 |
Freitas, Marcos Roberto de Janson, Guilherme Pinzan, Arnaldo Henriques, José Fernando Castanha |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Freitas, Karina Maria Salvatore de Freitas, Marcos Roberto de Janson, Guilherme Pinzan, Arnaldo Henriques, José Fernando Castanha |
dc.subject.por.fl_str_mv |
Resultado de tratamento Recidiva Ortodontia Treatment outcomes Recurrence Orthodontics |
topic |
Resultado de tratamento Recidiva Ortodontia Treatment outcomes Recurrence Orthodontics |
description |
OBJECTIVE: The present study was designed to retrospectively evaluate Class I malocclusion cases treated with extraction of the four first premolars, aiming to establish the relationship between the quality of orthodontic treatment outcomes and the long-term occlusal stability. MATERIAL AND METHODS: The sample comprised 94 patients of both genders, presenting Class I malocclusion, treated with extractions of the four first premolars and Edgewise mechanics. All the patients selected were whites, being 50 males and 44 females. The mean pretreatment age was 13.46 years (s.d. 1.8). The mean treatment time was 2.09 years (s.d. 0.58), the mean retention time was 1.63 years (s.d. 0.73) and the mean time of postretention evaluation was 5.31 years (s.d. 1.61). The dental casts were measured at pretreatment (T1), posttreatment (T2) and postretention (T3), by the PAR index and by the Little irregularity index, and the correction due to treatment (T1-2) and the change at the postretention period (T3-2) were calculated. The descriptive statistics was performed and the Pearson correlation coefficient was applied for the PAR and the Little indices in the total sample, among the times evaluated. RESULTS: The mean PAR reduction due to treatment was 78.54%, and 66.6%, at the postretention stage related to pretreatment stage. Significant correlations were found for the PAR index at the times evaluated, except between T1 and T2 and between T1-2 and T3. In other words, the higher the treatment correction (T1-2), the lower the posttreatment PAR index (PAR T2) will be, and the higher will be the PAR change at the postretention period (PAR T3-2). Also, the higher the posttreatment PAR score (PAR T2), the higher will be the postretention PAR score (PAR T3). CONCLUSION: It was concluded that the quality of orthodontic treatment outcomes is not related to the long-term occlusal stability. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-10-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/jaos/article/view/3394 10.1590/S1678-77572006000500005 |
url |
https://www.revistas.usp.br/jaos/article/view/3394 |
identifier_str_mv |
10.1590/S1678-77572006000500005 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/jaos/article/view/3394/4084 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2006 Journal of Applied Oral Science info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2006 Journal of Applied Oral Science |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Odontologia de Bauru |
publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Odontologia de Bauru |
dc.source.none.fl_str_mv |
Journal of Applied Oral Science; Vol. 14 No. 5 (2006); 324-329 Journal of Applied Oral Science; Vol. 14 Núm. 5 (2006); 324-329 Journal of Applied Oral Science; v. 14 n. 5 (2006); 324-329 1678-7765 1678-7757 reponame:Journal of applied oral science (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Journal of applied oral science (Online) |
collection |
Journal of applied oral science (Online) |
repository.name.fl_str_mv |
Journal of applied oral science (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
||jaos@usp.br |
_version_ |
1800221672804974592 |