Relationship between Class III malocclusion and hyoid bone displacement during swallowing: a cine-magnetic resonance imaging study
Gokce Sila Mermut, Olmez Huseyin, Gokce Hasan Suat, Gorgulu Serkan, Karacay Seniz, Akca Eralp,
소속 상세정보
( Gokce Sila Mermut ) - Gulhane Military Medical Academy Dental Science Center Department of Orthodontics
( Olmez Huseyin ) - Gulhane Military Medical Academy Dental Science Center Department of Orthodontics
( Gokce Hasan Suat ) - Beytepe Military Hospital Dental Service
( Gorgulu Serkan ) - Gulhane Military Medical Academy Dental Science Center Department of Orthodontics
( Karacay Seniz ) - Gulhane Military Medical Academy Haydarpasa Training Center Department of Orthodontics
( Akca Eralp ) - Golcuk Military Hospital Dental Service
KMID : 0361920120420040190
Abstract
Objective: The displacement of the hyoid bone (HB) is a critical biomechanical component of the swallowing function. The aim of this study was to evaluate the swallowing-induced vertical and horizontal displacements of the HB in subjects with 2 different magnitudes of skeletal Class III malocclusion, by means of real-time, balanced turbo-field-echo (B-TFE) cine-magnetic resonance imaging.
Methods: The study population comprised 19 patients with mild skeletal Class III malocclusion, 16 with severe skeletal Class III malocclusion, and 20 with a skeletal Class I relationship. Before the commencement of the study, all subjects underwent cephalometric analysis to identify the nature of skeletal malformations. B-TFE images were obtained for the 4 consecutive stages of deglutition as each patient swallowed 10 mL of water, and the vertical and horizontal displacements of the HB were measured at each stage.
Results: At all stages of swallowing, the vertical position of the HB in the severe Class III malocclusion group was significantly lower than those in the mild Class III and Class I malocclusion groups. Similarly, the horizontal displacement of the HB was found to be significantly associated with the severity of malocclusion, i.e., the degree of Class III malocclusion, while the amount of anterior displacement of the HB decreased with an increase in the severity of the Class III deformity.
Conclusions: Our findings indicate the existence of a relationship between the magnitude of Class III malocclusion and HB displacement during swallowing.
키워드
Swallowing;Hyoid bone;Class III malocclusion;Magnetic resonance imaging;Deglutition
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