Correlation between midline deviation and condylar position in patients with Class II malocclusion: A cone-beam computed tomography evaluation.

Autor: Roque-Torres GD; Center of Dental Research, School of Dentistry, Loma Linda University, Loma Linda, Calif. Electronic address: gdrtorres@llu.edu., Peyneau PD; University of Vila Velha, Vila Velha, Espírito Santo, Brazil., Dantas da Costa E; Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil., Bóscolo FN; Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil., Maria de Almeida S; Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil., Ribeiro LW; Hermínio Ometto University Center, Araras, São Paulo, Brazil.
Jazyk: angličtina
Zdroj: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics [Am J Orthod Dentofacial Orthop] 2018 Jul; Vol. 154 (1), pp. 99-107.
DOI: 10.1016/j.ajodo.2017.10.029
Abstrakt: Introduction: Midline deviation of the mandible and maxilla can affect craniofacial growth and occlusion and cause consequences to the temporomandibular joint. The aim of this study was to evaluate the lateral displacement of the skeletal and dental midlines in relation to the condyle head position in Class II patients with cone-beam computed tomography.
Methods: We used 82 cone-beam computed tomography images. The lateral displacement of the skeletal and dental midlines considering the 3-dimensional reference plane was analyzed with points in the maxillary and mandibular central incisors, anterior nasal spine, and menton. The condyle-fossa relationship, concentric position of the condyles, and dimensional and positional symmetries between the right and left condyles were evaluated.
Results: There was a statistically significant difference regarding anterior nasal spine with maxillary central incisor, menton, and mandibular central incisor points for both sides, and also for maxillary central incisor-menton for the displacement of the left side. We found differences in the temporomandibular joint for inclination and diameter measurements of the condylar process. Strong correlations were observed between the maxilla and the condylar process diameter (right side) and the distance between the geometric centers (left side), in addition to a strong correlation between the sagittal midline displacement and the geometric center differences on the right and left sides.
Conclusions: In patients with Class II malocclusion, lateral displacement of skeletal and dental midlines in relation to the condyle head position has a significant correlation with the anteroposterior difference between the geometric center of the right and left condylar processes.
(Copyright © 2018 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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