Relationship of the hyoid bone and posterior surface of the tongue in prognathism and micrognathia

Yamaoka, Minoru; Furusawa, Kiyofumi; Uematsu, Takashi; Okafuji, Norimasa; Kayamoto, D.; Kurihara, Saburo

doi:10.1046/j.1365-2842.2003.01069.x

Cited by 29 publications

(27 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Current measurements showed that hyoid bone tended to move anteriorly, which was more noticeable in the treatment group and were probably due to the more anterior displacement of the mandible, in line with the findings of Jena et al [20]. As the genioglossus muscle is the main protruder of the tongue, it acts as an accessory respiratory muscle, resulting in advancement of the base of the tongue and dilation of the airway [29,30]. Zhou et al [27] also found that hyoid moved forward and downward following treatment with FR-I.…”

Section: Discussionsupporting

confidence: 85%

Evaluation of airway dimensions and changes in hyoid bone position following class II functional therapy with activator

Ulusoy

Bavbek

Tuncer

et al. 2014

Acta Odontologica Scandinavica

View full text Add to dashboard Cite

show abstract

Section: Discussionsupporting

confidence: 85%

Evaluation of airway dimensions and changes in hyoid bone position following class II functional therapy with activator

Ulusoy

Bavbek

Tuncer

et al. 2014

Acta Odontologica Scandinavica

View full text Add to dashboard Cite

show abstract

“…The hyoid position represents tongue posture and function, and hyoid structures are guided to an anterio-inferior position to avoid compromising the vital airway passage as a compensatory action. 29 …”

Section: Discussionmentioning

confidence: 99%

Effects of reverse headgear on pharyngeal airway in patients with different vertical craniofacial features

et al. 2015

View full text Add to dashboard Cite

The aim of this study was to investigate the effects of reverse headgear (RH) on pharyngeal airway morphology in two groups of Class III patients with different vertical craniofacial features in comparison with an untreated Class III group. Seventeen subjects (9 males, 8 females; mean age 11.3 ± 0.98 years) with optimum vertical growth and 17 subjects (10 males, 7 females, mean age 11.5 ± 1.1 years) with a vertical growth pattern treated with a removable intra-oral appliance and a Delaire type facemask were included. An untreated Class III control group of 11 subjects (8 males, 3 females, mean age 9.1 ± 1.1 years) was included to compare the treated groups. The paired t-test for intragroup and one-way ANOVA for intergroup comparisons were performed. The relationships between changes in the craniofacial morphology and airway were assessed by Spearman correlation analysis. The airway dimensions at the adenoid side and soft palate were increased in the treatment groups compared to the control group (p < 0.05). The nasopharyngeal area demonstrated a significant difference in normodivergent and control subjects (p < 0.05). No significant difference was found in the airway morphology due to different vertical features. The effect of RH treatment on the sagittal airway dimensions revealed no significant difference between different vertical craniofacial features in the short term.

show abstract

“…Yamaoka et al [28] found that the tongue root was situated more posteriorly in Class II females subjects compared with Class III ones. Also, the change in hyoid bone position and lower pharyngeal airway space caused by anteroposterior position of the mandible is well documented [29].…”

Section: Lowermentioning

confidence: 96%

Effects of Functional Appliance Therapy on the Depth of the Pharyngeal Airways: Activator vs. Forsus

Taki¹

2015

JDHODT

View full text Add to dashboard Cite

The sample consisted of 25 adolescents (14 boys and 11 girls, average age 11 years 8 months), whose lateral cephalograms taken before (T 1 ) and after the treatment (T 2 ) with functional appliances (total 50) were collected. The lateral cephalometric radiographs were compiled from their clinical records kept at Research Article AbstractAims: The aim of this study was to evaluate the changes in Dento-skeletal components following orthopedic therapy of Class II skeletal malocclusions, and to assess the effect of these changes on the depth of the pharyngeal airways, after treatment with removable and fixed functional appliances.Methodology: 25 adolescents (14 boys and 11 girls, mean age 11.67 years) were chosen. The subjects were divided into two groups according to the treatment type: removable appliance group (13 subjects, 7 boys and 6 girls, mean age 12 years) and fixed appliance group (12 subjects, 7 boys and 5 girls, mean age 11.33 years). Lateral cephalometric radiographs taken before (T1) and after the treatments (T2) were digitally analyzed. Paired t-test was used to determine the possible statistically significant changes (T2-T1) for both groups. Identified differences between the groups were further analyzed using the Mann-Whitney U-test at the 95% confidence interval (P <.05).Results: Functional appliance therapy showed no statistically significant changes in upper pharyngeal airway depth (UPAD) and middle pharyngeal airway depth (MPAD). Only the lower pharyngeal airway depth (LPAD) was increased significantly (P<.05) due to the forward positioning of the mandible, determined by significant increase in SNB, ANB, and Pog to N perp. Intergroup comparisons showed no statistically significant differences between removable and fixed appliances (P >.05). Conclusion:Positive sagittal mandibular change, as a result of both types of functional appliances therapy, had a significant increase on the depth of the lower pharyngeal airway. The sample was then divided into two groups. The first group consisted of the subjects who were treated with removable functional appliances (Activator type), and the second group consisted of those who were treated with fixed functional appliances, Forsus Fatigue Resistant Device (FRD) (3M Unitek Corp, Monrovia, Calif).The sex and age distribution of the treatment groups are shown in Table 1. Although chronological ages appear different between groups, growth stages were closely matched according to cervical vertebra maturation (CVM) assessment on lateral cephalograms. Keywords:The removable appliance group comprised of 13 subjects (7 boys and 6 girls, mean age 12 years), with the duration of treatment ranging from 6 to 15 months with an average of 11.6 months.The activator appliance used was an acrylic monobloc with clasps used to fixate the appliance to the upper first molars. The appliance was produced from a construction bite that positioned the mandible anteriorly in an edge-to-edge incisal relationship. The lower jaw was postured forward in a Class I or overcorrected Class I ...

show abstract

Relationship of the hyoid bone and posterior surface of the tongue in prognathism and micrognathia

Cited by 29 publications

References 27 publications

Evaluation of airway dimensions and changes in hyoid bone position following class II functional therapy with activator

Evaluation of airway dimensions and changes in hyoid bone position following class II functional therapy with activator

Effects of reverse headgear on pharyngeal airway in patients with different vertical craniofacial features

Effects of Functional Appliance Therapy on the Depth of the Pharyngeal Airways: Activator vs. Forsus

Contact Info

Product

Resources

About