Temporomandibular joint articular disc position and shape in skeletal Class III.

Autor: Tagawa DT; Department of Diagnostic Imaging, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil.; Department of Orthodontics, Universidade Santa Cecília, Santos, Brazil., Franco AA; Private Practice, Aracaju, Brazil., Puchnick A; Department of Diagnostic Imaging, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil., Wolosker AMB; Department of Diagnostic Imaging, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil., Florez BM; Department of Orthodontics, Universidade Santa Cecília, Santos, Brazil., Dominguez GC; Department of Orthodontics, Universidade de São Paulo (USP), São Paulo, Brazil., Yamashita HK; Department of Diagnostic Imaging, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil., Cevidanes LHS; Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA., Aidar LAA; Department of Orthodontics, Universidade Santa Cecília, Santos, Brazil., Junior HC; Department of Diagnostic Imaging, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil.
Jazyk: angličtina
Zdroj: Orthodontics & craniofacial research [Orthod Craniofac Res] 2023 May; Vol. 26 (2), pp. 185-196. Date of Electronic Publication: 2022 Aug 10.
DOI: 10.1111/ocr.12599
Abstrakt: Objective: To compare the position and shape of the temporomandibular joint (TMJ) articular disc among the sagittal and vertical skeletal patterns in Angle Class III, Class III subdivision malocclusion and normal occlusion. The null hypothesis was that there was no difference in disc position and shape in different (1) malocclusions and (2) skeletal patterns.
Methods: This cross-sectional observational study evaluated 105 patients divided into 3 groups: Class III (33, 9.39 ± 1.96 years), Class III subdivision (45, 9.51 ± 1.59 years) and a normal occlusion (27, 10.24 ± 0.87 years) was included as healthy control. Severity of the maxilla-mandibular anteroposterior discrepancy and vertical facial pattern were determined using 2D cephalometry, and the position and shape of the articular discs were evaluated in magnetic resonance images. Statistical parametric and non-parametric tests and Kappa analysis for intra-observer and inter-observer assessment were used (p ≤ .05).
Results: Significant between-group differences were found in articular disc position. In the normal occlusion group, all the articular discs were well positioned. In Class III and Class III subdivision, the discs were displaced in 30.3% and 12.2% of the TMJs, respectively. Sagittal and vertical skeletal patterns did not affect the findings significantly. The Class III subdivision malocclusion group is probably different from the other groups, showing 97.7% of biconcave discs in both TMJs.
Conclusion: The longitudinal follow-up of this sample becomes relevant as the two groups with malocclusion in the pre-peak phase of pubertal growth showed differences in the prevalence of displacement and form of the articular disc, with no association with their vertical facial characteristics.
(© 2022 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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