Thin-plate spline analysis of mandibular shape changes induced by functional appliances in Class II malocclusion A long-term evaluation
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s00056-016-0041-5 http://hdl.handle.net/11449/162175 |
Resumo: | Aims The purpose of this work was to evaluate the longterm morphological mandibular changes induced by functional treatment of Class II malocclusion with mandibular retrusion. Methods Forty patients (20 females, 20 males) with Class II malocclusion consecutively treated with either a Bionator or an Activator followed by fixed appliances were compared with a control group of 40 subjects (19 females, 21 males) with untreated Class II malocclusion. Lateral cephalograms were available at the start of treatment (T1, mean age 9.9 years), at the end of treatment with functional appliances (T2, mean age 12.2 years), and for long-term follow-up (T3, mean age 18.3 years). Mandibular shape changes were analyzed on lateral cephalograms of the subjects in both groups via thin-plate spline (TPS) analysis. Shape differences were statistically analyzed by conducting permutation tests on Goodall F statistics. Results In the long term, both the treated and control groups exhibited significant longitudinal mandibular shape changes characterized by upward and forward dislocation of point Co associated with a vertical extension in the gonial region and backward dislocation of point B. Conclusion Functional appliances induced mandible's significant posterior morphogenetic rotation over the short term. The treated and control groups demonstrated similar mandibular shape over the long term. |
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Thin-plate spline analysis of mandibular shape changes induced by functional appliances in Class II malocclusion A long-term evaluationClass II malocclusionFunctional appliancesThin-plate spline analysisCephalogramsAims The purpose of this work was to evaluate the longterm morphological mandibular changes induced by functional treatment of Class II malocclusion with mandibular retrusion. Methods Forty patients (20 females, 20 males) with Class II malocclusion consecutively treated with either a Bionator or an Activator followed by fixed appliances were compared with a control group of 40 subjects (19 females, 21 males) with untreated Class II malocclusion. Lateral cephalograms were available at the start of treatment (T1, mean age 9.9 years), at the end of treatment with functional appliances (T2, mean age 12.2 years), and for long-term follow-up (T3, mean age 18.3 years). Mandibular shape changes were analyzed on lateral cephalograms of the subjects in both groups via thin-plate spline (TPS) analysis. Shape differences were statistically analyzed by conducting permutation tests on Goodall F statistics. Results In the long term, both the treated and control groups exhibited significant longitudinal mandibular shape changes characterized by upward and forward dislocation of point Co associated with a vertical extension in the gonial region and backward dislocation of point B. Conclusion Functional appliances induced mandible's significant posterior morphogenetic rotation over the short term. The treated and control groups demonstrated similar mandibular shape over the long term.Univ Florence, Dept Surg & Translat Med, Via Ponte di Mezzo 46-48, I-50127 Florence, ItalyUniv Michigan, Sch Dent, Dept Orthodont & Pediat Dent, Ann Arbor, MI 48109 USAUniv Roma Tor Vergata, Dept Clin Sci & Translat Med, Rome, ItalyUniv Nostra Signora Buon Consiglio, Sch Dent, Dept Orthodont, Tirana, AlbaniaUniv Paulista, Sch Dent, Dept Orthodont, Sao Paulo, BrazilSao Paulo State Univ Julio de Mesquita Filho, Dent Sch Aracatuba, Dept Pediat & Social Dent, Aracatuba, BrazilSao Paulo State Univ Julio de Mesquita Filho, Dent Sch Aracatuba, Dept Pediat & Social Dent, Aracatuba, BrazilUrban & VogelUniv FlorenceUniv MichiganUniv Roma Tor VergataUniv Nostra Signora Buon ConsiglioUniv PaulistaUniversidade Estadual Paulista (Unesp)Franchi, LorenzoPavoni, ChiaraFaltin, KurtBigliazzi, Renato [UNESP]Gazzani, FrancescaCozza, Paola2018-11-26T17:10:41Z2018-11-26T17:10:41Z2016-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article325-333application/pdfhttp://dx.doi.org/10.1007/s00056-016-0041-5Journal Of Orofacial Orthopedics-fortschritte Der Kieferorthopadie. Munich: Urban & Vogel, v. 77, n. 5, p. 325-333, 2016.1434-5293http://hdl.handle.net/11449/16217510.1007/s00056-016-0041-5WOS:000388299100002WOS000388299100002.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Orofacial Orthopedics-fortschritte Der Kieferorthopadie0,579info:eu-repo/semantics/openAccess2023-12-01T06:20:18Zoai:repositorio.unesp.br:11449/162175Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:15:46.943356Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thin-plate spline analysis of mandibular shape changes induced by functional appliances in Class II malocclusion A long-term evaluation |
title |
Thin-plate spline analysis of mandibular shape changes induced by functional appliances in Class II malocclusion A long-term evaluation |
spellingShingle |
Thin-plate spline analysis of mandibular shape changes induced by functional appliances in Class II malocclusion A long-term evaluation Franchi, Lorenzo Class II malocclusion Functional appliances Thin-plate spline analysis Cephalograms |
title_short |
Thin-plate spline analysis of mandibular shape changes induced by functional appliances in Class II malocclusion A long-term evaluation |
title_full |
Thin-plate spline analysis of mandibular shape changes induced by functional appliances in Class II malocclusion A long-term evaluation |
title_fullStr |
Thin-plate spline analysis of mandibular shape changes induced by functional appliances in Class II malocclusion A long-term evaluation |
title_full_unstemmed |
Thin-plate spline analysis of mandibular shape changes induced by functional appliances in Class II malocclusion A long-term evaluation |
title_sort |
Thin-plate spline analysis of mandibular shape changes induced by functional appliances in Class II malocclusion A long-term evaluation |
author |
Franchi, Lorenzo |
author_facet |
Franchi, Lorenzo Pavoni, Chiara Faltin, Kurt Bigliazzi, Renato [UNESP] Gazzani, Francesca Cozza, Paola |
author_role |
author |
author2 |
Pavoni, Chiara Faltin, Kurt Bigliazzi, Renato [UNESP] Gazzani, Francesca Cozza, Paola |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Univ Florence Univ Michigan Univ Roma Tor Vergata Univ Nostra Signora Buon Consiglio Univ Paulista Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Franchi, Lorenzo Pavoni, Chiara Faltin, Kurt Bigliazzi, Renato [UNESP] Gazzani, Francesca Cozza, Paola |
dc.subject.por.fl_str_mv |
Class II malocclusion Functional appliances Thin-plate spline analysis Cephalograms |
topic |
Class II malocclusion Functional appliances Thin-plate spline analysis Cephalograms |
description |
Aims The purpose of this work was to evaluate the longterm morphological mandibular changes induced by functional treatment of Class II malocclusion with mandibular retrusion. Methods Forty patients (20 females, 20 males) with Class II malocclusion consecutively treated with either a Bionator or an Activator followed by fixed appliances were compared with a control group of 40 subjects (19 females, 21 males) with untreated Class II malocclusion. Lateral cephalograms were available at the start of treatment (T1, mean age 9.9 years), at the end of treatment with functional appliances (T2, mean age 12.2 years), and for long-term follow-up (T3, mean age 18.3 years). Mandibular shape changes were analyzed on lateral cephalograms of the subjects in both groups via thin-plate spline (TPS) analysis. Shape differences were statistically analyzed by conducting permutation tests on Goodall F statistics. Results In the long term, both the treated and control groups exhibited significant longitudinal mandibular shape changes characterized by upward and forward dislocation of point Co associated with a vertical extension in the gonial region and backward dislocation of point B. Conclusion Functional appliances induced mandible's significant posterior morphogenetic rotation over the short term. The treated and control groups demonstrated similar mandibular shape over the long term. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-09-01 2018-11-26T17:10:41Z 2018-11-26T17:10:41Z |
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/10.1007/s00056-016-0041-5 Journal Of Orofacial Orthopedics-fortschritte Der Kieferorthopadie. Munich: Urban & Vogel, v. 77, n. 5, p. 325-333, 2016. 1434-5293 http://hdl.handle.net/11449/162175 10.1007/s00056-016-0041-5 WOS:000388299100002 WOS000388299100002.pdf |
url |
http://dx.doi.org/10.1007/s00056-016-0041-5 http://hdl.handle.net/11449/162175 |
identifier_str_mv |
Journal Of Orofacial Orthopedics-fortschritte Der Kieferorthopadie. Munich: Urban & Vogel, v. 77, n. 5, p. 325-333, 2016. 1434-5293 10.1007/s00056-016-0041-5 WOS:000388299100002 WOS000388299100002.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Orofacial Orthopedics-fortschritte Der Kieferorthopadie 0,579 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
325-333 application/pdf |
dc.publisher.none.fl_str_mv |
Urban & Vogel |
publisher.none.fl_str_mv |
Urban & Vogel |
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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1808129043459997696 |