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Different manifestations of Class II Division 2 incisor retroclination: a morphologic study.
Am J Orthod Dentofacial Orthop. 2013 Mar; 143(3):310-6.AJ

Abstract

INTRODUCTION

The aims of this study were to investigate whether there is a different transverse morphologic pattern of dental arches among patients with different manifestations of Class II Division 2 incisor retroclination and to evaluate to what extent the pattern of smaller-than-average teeth in Class II Division 2 malocclusion is common to all groups studied. This information might clarify whether different Class II Division 2 phenotypes represent a single etiology or multiple etiologies.

METHODS

The sample comprised 108 subjects with Class II Division 2 malocclusions, divided into 2 groups according to the type of incisor retroclination: group I included 43 Class II Division 2 subjects with retroclination exclusively of the maxillary central incisors, and group II included 65 Class II Division 2 subjects with retroclination of the 4 maxillary incisors. Maxillary and mandibular intercanine and intermolar widths as well as mesiodistal crown dimensions of the 4 maxillary and mandibular incisors were determined from the patients' initial study models. Mean values of all variables were compared between the 2 groups by sex with analysis of variance.

RESULTS

From the comparison between these 2 groups, no statistically significant differences were found for all transverse measurements (P >0.05). For all mesiodistal measurements analyzed, statistically significant differences between the groups were only found for the mean value of both maxillary lateral incisors' mesiodistal dimensions in both sexes (P <0.05).

CONCLUSIONS

It is not possible to attribute a characteristic pattern of dental arch-width and incisor mesiodistal dimensions to the different manifestations of incisor retroclination in Class II Division 2 malocclusion.

Authors+Show Affiliations

Department of Orthodontics, Egas Moniz High Institute for Health Science, Lisbon, Portugal. pmarianop@sapo.ptNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

23452964

Citation

Mariano Pereira, Pedro, et al. "Different Manifestations of Class II Division 2 Incisor Retroclination: a Morphologic Study." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 143, no. 3, 2013, pp. 310-6.
Mariano Pereira P, Pinhão Ferreira A, Tavares P, et al. Different manifestations of Class II Division 2 incisor retroclination: a morphologic study. Am J Orthod Dentofacial Orthop. 2013;143(3):310-6.
Mariano Pereira, P., Pinhão Ferreira, A., Tavares, P., & Braga, A. C. (2013). Different manifestations of Class II Division 2 incisor retroclination: a morphologic study. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 143(3), 310-6. https://doi.org/10.1016/j.ajodo.2012.09.021
Mariano Pereira P, et al. Different Manifestations of Class II Division 2 Incisor Retroclination: a Morphologic Study. Am J Orthod Dentofacial Orthop. 2013;143(3):310-6. PubMed PMID: 23452964.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Different manifestations of Class II Division 2 incisor retroclination: a morphologic study. AU - Mariano Pereira,Pedro, AU - Pinhão Ferreira,Afonso, AU - Tavares,Purificação, AU - Braga,Ana Cristina, PY - 2012/04/01/received PY - 2012/09/01/revised PY - 2012/09/01/accepted PY - 2013/3/5/entrez PY - 2013/3/5/pubmed PY - 2013/4/25/medline SP - 310 EP - 6 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 143 IS - 3 N2 - INTRODUCTION: The aims of this study were to investigate whether there is a different transverse morphologic pattern of dental arches among patients with different manifestations of Class II Division 2 incisor retroclination and to evaluate to what extent the pattern of smaller-than-average teeth in Class II Division 2 malocclusion is common to all groups studied. This information might clarify whether different Class II Division 2 phenotypes represent a single etiology or multiple etiologies. METHODS: The sample comprised 108 subjects with Class II Division 2 malocclusions, divided into 2 groups according to the type of incisor retroclination: group I included 43 Class II Division 2 subjects with retroclination exclusively of the maxillary central incisors, and group II included 65 Class II Division 2 subjects with retroclination of the 4 maxillary incisors. Maxillary and mandibular intercanine and intermolar widths as well as mesiodistal crown dimensions of the 4 maxillary and mandibular incisors were determined from the patients' initial study models. Mean values of all variables were compared between the 2 groups by sex with analysis of variance. RESULTS: From the comparison between these 2 groups, no statistically significant differences were found for all transverse measurements (P >0.05). For all mesiodistal measurements analyzed, statistically significant differences between the groups were only found for the mean value of both maxillary lateral incisors' mesiodistal dimensions in both sexes (P <0.05). CONCLUSIONS: It is not possible to attribute a characteristic pattern of dental arch-width and incisor mesiodistal dimensions to the different manifestations of incisor retroclination in Class II Division 2 malocclusion. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/23452964/Different_manifestations_of_Class_II_Division_2_incisor_retroclination:_a_morphologic_study_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(12)01092-X DB - PRIME DP - Unbound Medicine ER -