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Association of dentoskeletal morphology with incisor inclination in angle class II patients: a retrospective cephalometric study

INTRODUCTION: The purpose of this study was to identify possible dentoskeletal parameters associated with variation of anterior tooth inclination in Angle Class II subdivisions. METHODS: Pre-treatment lateral radiographs of 144 Class II patients (68 males, 76 females) aged 9 to 17 years were classif...

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Autores principales: Kirschneck, Christian, Römer, Piero, Proff, Peter, Lippold, Carsten
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3846714/
https://www.ncbi.nlm.nih.gov/pubmed/24004488
http://dx.doi.org/10.1186/1746-160X-9-24
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author Kirschneck, Christian
Römer, Piero
Proff, Peter
Lippold, Carsten
author_facet Kirschneck, Christian
Römer, Piero
Proff, Peter
Lippold, Carsten
author_sort Kirschneck, Christian
collection PubMed
description INTRODUCTION: The purpose of this study was to identify possible dentoskeletal parameters associated with variation of anterior tooth inclination in Angle Class II subdivisions. METHODS: Pre-treatment lateral radiographs of 144 Class II patients (68 males, 76 females) aged 9 to 17 years were classified for upper incisor inclination into three groups (proclined, normally inclined, retroclined) homogeneous for gender and skeletal jaw relationship. The effect of age on the 22 cephalometric variables was controlled by covariance analysis. RESULTS: Multivariate analysis of the cephalometric parameters indicated significant inter-group differences. Systematic associations with incisor inclination were revealed using rank correlation: Lower incisor proclination, Wits appraisal and gonial angle significantly decreased (0.04 ≥ p ≥ 0.002), while intercisal angle, mandibular total and corpus length and nasolabial angle increased (0.04 ≥ p ≥ 0.001) with decreasing incisor proclination. CONCLUSIONS: Clear-cut classification criteria and control of confounding effects may clarify conflicting previous findings on dentoskeletal differences between Class II subdivisions in the mixed dentition. Only minor dentoskeletal differences appear to be associated with incisor inclination. The increased interincisal and nasolabial angle in Class II division 2 subjects are due to reclination of both upper and lower incisors. Jaw positions and chin prominence are not significantly different between the subdivisions. However, Wits appraisal is decreased in Class II division 2. The increased mandibular length observed in Class II division 2 requires further scrutinization.
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spelling pubmed-38467142013-12-06 Association of dentoskeletal morphology with incisor inclination in angle class II patients: a retrospective cephalometric study Kirschneck, Christian Römer, Piero Proff, Peter Lippold, Carsten Head Face Med Research INTRODUCTION: The purpose of this study was to identify possible dentoskeletal parameters associated with variation of anterior tooth inclination in Angle Class II subdivisions. METHODS: Pre-treatment lateral radiographs of 144 Class II patients (68 males, 76 females) aged 9 to 17 years were classified for upper incisor inclination into three groups (proclined, normally inclined, retroclined) homogeneous for gender and skeletal jaw relationship. The effect of age on the 22 cephalometric variables was controlled by covariance analysis. RESULTS: Multivariate analysis of the cephalometric parameters indicated significant inter-group differences. Systematic associations with incisor inclination were revealed using rank correlation: Lower incisor proclination, Wits appraisal and gonial angle significantly decreased (0.04 ≥ p ≥ 0.002), while intercisal angle, mandibular total and corpus length and nasolabial angle increased (0.04 ≥ p ≥ 0.001) with decreasing incisor proclination. CONCLUSIONS: Clear-cut classification criteria and control of confounding effects may clarify conflicting previous findings on dentoskeletal differences between Class II subdivisions in the mixed dentition. Only minor dentoskeletal differences appear to be associated with incisor inclination. The increased interincisal and nasolabial angle in Class II division 2 subjects are due to reclination of both upper and lower incisors. Jaw positions and chin prominence are not significantly different between the subdivisions. However, Wits appraisal is decreased in Class II division 2. The increased mandibular length observed in Class II division 2 requires further scrutinization. BioMed Central 2013-09-03 /pmc/articles/PMC3846714/ /pubmed/24004488 http://dx.doi.org/10.1186/1746-160X-9-24 Text en Copyright © 2013 Kirschneck et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Kirschneck, Christian
Römer, Piero
Proff, Peter
Lippold, Carsten
Association of dentoskeletal morphology with incisor inclination in angle class II patients: a retrospective cephalometric study
title Association of dentoskeletal morphology with incisor inclination in angle class II patients: a retrospective cephalometric study
title_full Association of dentoskeletal morphology with incisor inclination in angle class II patients: a retrospective cephalometric study
title_fullStr Association of dentoskeletal morphology with incisor inclination in angle class II patients: a retrospective cephalometric study
title_full_unstemmed Association of dentoskeletal morphology with incisor inclination in angle class II patients: a retrospective cephalometric study
title_short Association of dentoskeletal morphology with incisor inclination in angle class II patients: a retrospective cephalometric study
title_sort association of dentoskeletal morphology with incisor inclination in angle class ii patients: a retrospective cephalometric study
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3846714/
https://www.ncbi.nlm.nih.gov/pubmed/24004488
http://dx.doi.org/10.1186/1746-160X-9-24
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