Cephalometric evaluation of the hyoid triangle before and after maxillary rapid expansion in patients with skeletal class II, mixed dentition, and infantile swallowing

Parisella, Valeria and Vozza, Iole and Capasso, Francesca and Luzzi, Valeria and Ierardo, Gaetano and Nofroni, Italo and Polimeni, Antonella (2012) Cephalometric evaluation of the hyoid triangle before and after maxillary rapid expansion in patients with skeletal class II, mixed dentition, and infantile swallowing. Annali di stomatologia, 3 (3-4). pp. 95-99. ISSN 1971-1441

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Abstract

Background. Rocabado’s hyoid triangle is the only cephalometric parameter that can assess the effects of orthodontic treatment on tongue posture. Aim. To evaluate the restoration of tongue posture and function by conducting a cephalometric assessment of the hyoid triangle before and after rapid maxillary expansion. Methods. Sixtyfour healthy patients aged 6-11 years with skeletal class II malocclusion, mixed dentition, and infantile swallowing took part in this study. They submitted to lateral cephalometric radiography before and after orthodontic maxillary rapid expansion, in order to assess the resulting changes in the proportions of the hyoid triangle (following Rocabado’s parameters). The cephalometric findings were compared according to sex, age, and divergence using the chi-square McNemar test at the 5% significance level (p<0.05). Results. The orthodontic treatment resulted an improvement from skeletal class II malocclusion to class I, with elimination of infantile swallowing in 81.8% of male patients [95% confidence interval (CI)=61.5–92.7%], in 87.1% of patients aged 6–7 years (95% CI=71.1–94.9%). Conclusions. This cephalometric analysis revealed that the hyoid riangle was modified by the orthodontic maxillary expansion, reconditioning of tongue posture and function particularly among male, aged 6-7 years old with skeletal class II malocclusion, mixed dentition, and infantile swallowing.

Item Type:	Article
Uncontrolled Keywords:	Cephalometric evaluation, orthodontic treatment, infantile swallowing, mixed dentition, hyoid triangle
Subjects:	600 Tecnologia - Scienze applicate > 610 Medicina e salute (Classificare qui la tecnologia dei servizi medici) > 617 Rami vari della medicina; Chirurgia > 617.5 Medicina regionale; Chirurgia regionale
Depositing User:	Chiara D'Arpa
Date Deposited:	17 Apr 2013 14:37
Last Modified:	16 May 2013 11:00
URI:	http://eprints.bice.rm.cnr.it/id/eprint/5037

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