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Longitudinal evaluation of dental arch asymmetry in Class II subdivision malocclusion with 3-dimensional digital models.
Am J Orthod Dentofacial Orthop. 2014 Jun; 145(6):763-70.AJ

Abstract

INTRODUCTION

Class II subdivision malocclusions with their asymmetric occlusal relationships often pose treatment difficulties. The aim of this study was to evaluate the longitudinal changes of dental arch asymmetry in untreated subjects with Class II subdivision malocclusion.

METHODS

From 706 files from the University of Michigan Growth Study, longitudinal records of 17 untreated subjects with Class II subdivision malocclusion were included this study. Dental arch changes at 3 consecutive longitudinal intervals, defined by the cervical vertebral maturation method, were analyzed on digital dental models. The average ages of the subjects were 12.4, 15.1, and 19.1 years at the 3 time periods, respectively. Maxillary and mandibular reference lines were constructed and used for the intra-arch asymmetry measurements. The Friedman test and analysis of variance with repeated measures were used to determine dental arch asymmetries at the P <0.05 level.

RESULTS

All subjects were found to have a type 1 Class II subdivision malocclusion characterized by distal positioning of the mandibular first molar on the Class II side. No statistically significant intra-arch asymmetry changes were found for the maxillary and mandibular dental arches in any time period. Between the baseline and the final follow-up, the data indicated decreases in maxillary and mandibular intercanine arch widths and arch lengths symmetrically.

CONCLUSIONS

The results of this study indicate that the dental arch asymmetry in patients with Class II subdivision malocclusions did not improve or worsen with growth.

Authors+Show Affiliations

Assistant professor, Department of Orthodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey.Research assistant, Department of Orthodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey.Professor and head, Department of Orthodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey. Electronic address: tancanuysal@yahoo.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

24880847

Citation

Veli, Ilknur, et al. "Longitudinal Evaluation of Dental Arch Asymmetry in Class II Subdivision Malocclusion With 3-dimensional Digital Models." 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. 145, no. 6, 2014, pp. 763-70.
Veli I, Yuksel B, Uysal T. Longitudinal evaluation of dental arch asymmetry in Class II subdivision malocclusion with 3-dimensional digital models. Am J Orthod Dentofacial Orthop. 2014;145(6):763-70.
Veli, I., Yuksel, B., & Uysal, T. (2014). Longitudinal evaluation of dental arch asymmetry in Class II subdivision malocclusion with 3-dimensional digital models. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 145(6), 763-70. https://doi.org/10.1016/j.ajodo.2014.01.023
Veli I, Yuksel B, Uysal T. Longitudinal Evaluation of Dental Arch Asymmetry in Class II Subdivision Malocclusion With 3-dimensional Digital Models. Am J Orthod Dentofacial Orthop. 2014;145(6):763-70. PubMed PMID: 24880847.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Longitudinal evaluation of dental arch asymmetry in Class II subdivision malocclusion with 3-dimensional digital models. AU - Veli,Ilknur, AU - Yuksel,Burcin, AU - Uysal,Tancan, PY - 2013/09/01/received PY - 2014/01/01/revised PY - 2014/01/01/accepted PY - 2014/6/2/entrez PY - 2014/6/2/pubmed PY - 2014/7/19/medline SP - 763 EP - 70 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 - 145 IS - 6 N2 - INTRODUCTION: Class II subdivision malocclusions with their asymmetric occlusal relationships often pose treatment difficulties. The aim of this study was to evaluate the longitudinal changes of dental arch asymmetry in untreated subjects with Class II subdivision malocclusion. METHODS: From 706 files from the University of Michigan Growth Study, longitudinal records of 17 untreated subjects with Class II subdivision malocclusion were included this study. Dental arch changes at 3 consecutive longitudinal intervals, defined by the cervical vertebral maturation method, were analyzed on digital dental models. The average ages of the subjects were 12.4, 15.1, and 19.1 years at the 3 time periods, respectively. Maxillary and mandibular reference lines were constructed and used for the intra-arch asymmetry measurements. The Friedman test and analysis of variance with repeated measures were used to determine dental arch asymmetries at the P <0.05 level. RESULTS: All subjects were found to have a type 1 Class II subdivision malocclusion characterized by distal positioning of the mandibular first molar on the Class II side. No statistically significant intra-arch asymmetry changes were found for the maxillary and mandibular dental arches in any time period. Between the baseline and the final follow-up, the data indicated decreases in maxillary and mandibular intercanine arch widths and arch lengths symmetrically. CONCLUSIONS: The results of this study indicate that the dental arch asymmetry in patients with Class II subdivision malocclusions did not improve or worsen with growth. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/24880847/Longitudinal_evaluation_of_dental_arch_asymmetry_in_Class_II_subdivision_malocclusion_with_3_dimensional_digital_models_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(14)00239-X DB - PRIME DP - Unbound Medicine ER -