Oral myofunctional and electromyographic evaluation of the anterior suprahyoid muscles and tongue thrust in patients with Class II/1 malocclusion submitted to first premolar extraction

Oral myofunctional and electromyographic evaluation of the anterior suprahyoid muscles and tongue thrust in patients with Class II/1 malocclusion submitted to first premolar extraction

Author Souza, Denize Ramirez de Autor UNIFESP Google Scholar
Semeghini, Tatiana Adamov Google Scholar
Kroell, Lucio Benedito Google Scholar
Berzin, Fausto Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Univ Western Sao Paulo State
State Univ Compinas
Abstract Objective: The aim of this study was to assess the existence of myofunctional alterations before and after first premolar extraction in Class II/1 malocclusion patients that could endanger the long-term dental arch stability. Materials and Methods: The study was performed by means of morphological, functional and electromyographic analyses in 17 Class II/1 malocclusion patients (group T) and 17 Class I malocclusion patients (group C), both groups with 12-30-year age range (mean age: 20.93 4.94 years). Results: Data analyzed statistically by Student's t-test showed a significant decrease in the maxillary and mandibular dental arch perimeters after orthodontic treatment (p < 0.05). The Kruskal-Wallis test analyzed data from tongue posture at rest and during swallowing, not showing significant differences after treatment (groups Tb and Ta) (p > 0.05). However, group T differed significantly from group C (p < 0.05). The electromyographic data showed that the anterior right and left suprahyoid muscles acted. synergistically in both groups, while having a lower myoelectric activity in group T during swallowing. Conclusions: Myofunctional alterations observed after the orthodontic treatment in Class II/1 malocclusion seemed to jeopardize the long-term orthodontic stability, making recurrence possible. Further research should be conducted to compare electromyographic data before and after orthodontic treatment in order to corroborate the results of the present investigation.
Keywords neck muscles
tongue
electromyography
oral myofunctional evaluation
malocclusion
tooth extractions
Language English
Date 2007-01-01
Published in Journal Of Applied Oral Science. Bauru-sp: Univ Sao Paulo Fac Odontologia Bauru, v. 15, n. 1, p. 24-28, 2007.
ISSN 1678-7757 (Sherpa/Romeo, impact factor)
Publisher Univ Sao Paulo Fac Odontologia Bauru
Extent 24-28
Origin http://dx.doi.org/10.1590/S1678-77572007000100006
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000256738500005
SciELO ID S1678-77572007000100006 (statistics in SciELO)
URI http://repositorio.unifesp.br/11600/44182

Show full item record




File

File Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Search


Browse

Statistics

My Account