Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusion

Detalhes bibliográficos
Autor(a) principal: Franchi, Lorenzo
Data de Publicação: 2013
Outros Autores: Pavoni, Chiara, Faltin, Kurt [UNESP], McNamara, James A., Cozza, Paola
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.2319/052912-450.1
http://hdl.handle.net/11449/111506
Resumo: Objective: To analyze the long-term skeletal and dentoalveolar effects and to evaluate treatment timing of Class II treatment with functional appliances followed by fixed appliances.Materials and Methods: A group of 40 patients (22 females and 18 males) with Class II malocclusion consecutively treated either with a Bionator or an Activator followed by fixed appliances was compared with a control group of 20 subjects (9 females and 11 males) with untreated Class II malocclusion. Lateral cephalograms were available at the start of treatment (mean age 10 years), end of treatment with functional appliances (mean age 12 years), and long-term observation (mean age 18.6 years). The treated sample also was divided into two groups according to skeletal maturity. The early-treatment group was composed of 20 subjects (12 females and 8 males) treated before puberty, while the late-treatment group included 20 subjects (10 females and 10 males) treated at puberty. Statistical comparisons were performed with analysis of variance followed by Tukey's post hoc tests.Results: Significant long-term mandibular changes (Co-Gn) in the treated group (3.6 mm over the controls) were associated with improvements in the skeletal sagittal intermaxillary relationship, overjet, and molar relationship (similar to 3.0-3.5 mm). Treatment during the pubertal peak was able to produce significantly greater increases in total mandibular length (4.3 mm) and mandibular ramus height (3.1 mm) associated with a significant advancement of the bony chin (3.9 mm) when compared with treatment before puberty.Conclusion: Treatment of Class II malocclusion with functional appliances appears to be more effective at puberty. (Angle Orthod. 2013;83:334-340.)
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spelling Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusionFunctional jaw orthopedicsClass II malocclusionCervical vertebral maturationCephalometricsPubertyObjective: To analyze the long-term skeletal and dentoalveolar effects and to evaluate treatment timing of Class II treatment with functional appliances followed by fixed appliances.Materials and Methods: A group of 40 patients (22 females and 18 males) with Class II malocclusion consecutively treated either with a Bionator or an Activator followed by fixed appliances was compared with a control group of 20 subjects (9 females and 11 males) with untreated Class II malocclusion. Lateral cephalograms were available at the start of treatment (mean age 10 years), end of treatment with functional appliances (mean age 12 years), and long-term observation (mean age 18.6 years). The treated sample also was divided into two groups according to skeletal maturity. The early-treatment group was composed of 20 subjects (12 females and 8 males) treated before puberty, while the late-treatment group included 20 subjects (10 females and 10 males) treated at puberty. Statistical comparisons were performed with analysis of variance followed by Tukey's post hoc tests.Results: Significant long-term mandibular changes (Co-Gn) in the treated group (3.6 mm over the controls) were associated with improvements in the skeletal sagittal intermaxillary relationship, overjet, and molar relationship (similar to 3.0-3.5 mm). Treatment during the pubertal peak was able to produce significantly greater increases in total mandibular length (4.3 mm) and mandibular ramus height (3.1 mm) associated with a significant advancement of the bony chin (3.9 mm) when compared with treatment before puberty.Conclusion: Treatment of Class II malocclusion with functional appliances appears to be more effective at puberty. (Angle Orthod. 2013;83:334-340.)Univ Florence, Dept Orthodont, I-50127 Florence, ItalyUniv Estadual Paulista, Sch Dent, Dept Orthodont, Sao Paulo, BrazilUniv Michigan, Sch Dent, Dept Orthodont & Pediat Dent, Ann Arbor, MI 48109 USAUniv Michigan, Ctr Human Growth & Dev, Ann Arbor, MI 48109 USAUniv Roma Tor Vergata, Dept Orthodont, Rome, ItalyUniv Estadual Paulista, Sch Dent, Dept Orthodont, Sao Paulo, BrazilE H Angle Education Research Foundation, IncUniv FlorenceUniversidade Estadual Paulista (Unesp)University of MichiganUniv Roma Tor VergataFranchi, LorenzoPavoni, ChiaraFaltin, Kurt [UNESP]McNamara, James A.Cozza, Paola2014-12-03T13:08:43Z2014-12-03T13:08:43Z2013-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article334-340application/pdfhttp://dx.doi.org/10.2319/052912-450.1Angle Orthodontist. Newton N: E H Angle Education Research Foundation, Inc, v. 83, n. 2, p. 334-340, 2013.0003-3219http://hdl.handle.net/11449/11150610.2319/052912-450.1WOS:000315664500021WOS000315664500021.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAngle Orthodontist1.5921,267info:eu-repo/semantics/openAccess2023-11-09T06:09:55Zoai:repositorio.unesp.br:11449/111506Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:13:23.339335Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusion
title Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusion
spellingShingle Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusion
Franchi, Lorenzo
Functional jaw orthopedics
Class II malocclusion
Cervical vertebral maturation
Cephalometrics
Puberty
title_short Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusion
title_full Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusion
title_fullStr Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusion
title_full_unstemmed Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusion
title_sort Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusion
author Franchi, Lorenzo
author_facet Franchi, Lorenzo
Pavoni, Chiara
Faltin, Kurt [UNESP]
McNamara, James A.
Cozza, Paola
author_role author
author2 Pavoni, Chiara
Faltin, Kurt [UNESP]
McNamara, James A.
Cozza, Paola
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Univ Florence
Universidade Estadual Paulista (Unesp)
University of Michigan
Univ Roma Tor Vergata
dc.contributor.author.fl_str_mv Franchi, Lorenzo
Pavoni, Chiara
Faltin, Kurt [UNESP]
McNamara, James A.
Cozza, Paola
dc.subject.por.fl_str_mv Functional jaw orthopedics
Class II malocclusion
Cervical vertebral maturation
Cephalometrics
Puberty
topic Functional jaw orthopedics
Class II malocclusion
Cervical vertebral maturation
Cephalometrics
Puberty
description Objective: To analyze the long-term skeletal and dentoalveolar effects and to evaluate treatment timing of Class II treatment with functional appliances followed by fixed appliances.Materials and Methods: A group of 40 patients (22 females and 18 males) with Class II malocclusion consecutively treated either with a Bionator or an Activator followed by fixed appliances was compared with a control group of 20 subjects (9 females and 11 males) with untreated Class II malocclusion. Lateral cephalograms were available at the start of treatment (mean age 10 years), end of treatment with functional appliances (mean age 12 years), and long-term observation (mean age 18.6 years). The treated sample also was divided into two groups according to skeletal maturity. The early-treatment group was composed of 20 subjects (12 females and 8 males) treated before puberty, while the late-treatment group included 20 subjects (10 females and 10 males) treated at puberty. Statistical comparisons were performed with analysis of variance followed by Tukey's post hoc tests.Results: Significant long-term mandibular changes (Co-Gn) in the treated group (3.6 mm over the controls) were associated with improvements in the skeletal sagittal intermaxillary relationship, overjet, and molar relationship (similar to 3.0-3.5 mm). Treatment during the pubertal peak was able to produce significantly greater increases in total mandibular length (4.3 mm) and mandibular ramus height (3.1 mm) associated with a significant advancement of the bony chin (3.9 mm) when compared with treatment before puberty.Conclusion: Treatment of Class II malocclusion with functional appliances appears to be more effective at puberty. (Angle Orthod. 2013;83:334-340.)
publishDate 2013
dc.date.none.fl_str_mv 2013-03-01
2014-12-03T13:08:43Z
2014-12-03T13:08:43Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.2319/052912-450.1
Angle Orthodontist. Newton N: E H Angle Education Research Foundation, Inc, v. 83, n. 2, p. 334-340, 2013.
0003-3219
http://hdl.handle.net/11449/111506
10.2319/052912-450.1
WOS:000315664500021
WOS000315664500021.pdf
url http://dx.doi.org/10.2319/052912-450.1
http://hdl.handle.net/11449/111506
identifier_str_mv Angle Orthodontist. Newton N: E H Angle Education Research Foundation, Inc, v. 83, n. 2, p. 334-340, 2013.
0003-3219
10.2319/052912-450.1
WOS:000315664500021
WOS000315664500021.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Angle Orthodontist
1.592
1,267
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 334-340
application/pdf
dc.publisher.none.fl_str_mv E H Angle Education Research Foundation, Inc
publisher.none.fl_str_mv E H Angle Education Research Foundation, Inc
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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