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Three-dimensional changes of the hyoid bone and airway volumes related to its relationship with horizontal anatomic planes after bimaxillary surgery in skeletal Class III patients.
Angle Orthod. 2013 Jul; 83(4):623-9.AO

Abstract

OBJECTIVE

To evaluate longitudinal changes of the hyoid bone position and pharyngeal airway space after bimaxillary surgery in mandibular prognathism patients.

MATERIALS AND METHODS

Cone-beam computed tomography scans were taken for 25 mandibular prognathism patients before surgery (T0), 2 months after surgery (T1), and 6 months after surgery (T2). The positional displacement of the hyoid bone was assessed using the coordinates at T0, T1, and T2. Additionally, the volume of each subject's pharyngeal airway was measured.

RESULTS

The mean amount of posterior maxilla impaction was 3.76 ± 1.33 mm as the palatal plane rotated 2.04° ± 2.28° in a clockwise direction as a result of bimaxillary surgery. The hyoid bone moved backward (P < .05, P < .001) and downward (P > .05, P < .05) at 2 months and 6 months after surgery, while the total volume of the pharyngeal airway significantly decreased at the same time points (P < .001, P < .001). There was significant relationship between the changes of the hyoid bone position and airway volume at 2 months after surgery (P < .05). The change of the palatal plane angle was positively correlated to the decrease in the total airway volume (P < .001).

CONCLUSIONS

The null hypothesis was rejected. The hyoid bone moved inferoposteriorly, and the pharyngeal airway volume decreased for up to 6 months after bimaxillary surgery. The decrease in the pharyngeal airway volume was correlated to the changes in the palatal plane inclination and the positional change of the hyoid bone.

Authors+Show Affiliations

Department of Orthodontics, Kangdong Sacred Heart Hospital, Hallym University Medical Center, Seoul, Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

23311605

Citation

Kim, Min-Ah, et al. "Three-dimensional Changes of the Hyoid Bone and Airway Volumes Related to Its Relationship With Horizontal Anatomic Planes After Bimaxillary Surgery in Skeletal Class III Patients." The Angle Orthodontist, vol. 83, no. 4, 2013, pp. 623-9.
Kim MA, Kim BR, Choi JY, et al. Three-dimensional changes of the hyoid bone and airway volumes related to its relationship with horizontal anatomic planes after bimaxillary surgery in skeletal Class III patients. Angle Orthod. 2013;83(4):623-9.
Kim, M. A., Kim, B. R., Choi, J. Y., Youn, J. K., Kim, Y. J., & Park, Y. H. (2013). Three-dimensional changes of the hyoid bone and airway volumes related to its relationship with horizontal anatomic planes after bimaxillary surgery in skeletal Class III patients. The Angle Orthodontist, 83(4), 623-9. https://doi.org/10.2319/083112-700.1
Kim MA, et al. Three-dimensional Changes of the Hyoid Bone and Airway Volumes Related to Its Relationship With Horizontal Anatomic Planes After Bimaxillary Surgery in Skeletal Class III Patients. Angle Orthod. 2013;83(4):623-9. PubMed PMID: 23311605.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Three-dimensional changes of the hyoid bone and airway volumes related to its relationship with horizontal anatomic planes after bimaxillary surgery in skeletal Class III patients. AU - Kim,Min-Ah, AU - Kim,Bo-Ram, AU - Choi,Jin-Young, AU - Youn,Jong-Kuk, AU - Kim,Yoon-Ji R, AU - Park,Yang-Ho, Y1 - 2013/01/11/ PY - 2013/1/15/entrez PY - 2013/1/15/pubmed PY - 2013/11/6/medline SP - 623 EP - 9 JF - The Angle orthodontist JO - Angle Orthod VL - 83 IS - 4 N2 - OBJECTIVE: To evaluate longitudinal changes of the hyoid bone position and pharyngeal airway space after bimaxillary surgery in mandibular prognathism patients. MATERIALS AND METHODS: Cone-beam computed tomography scans were taken for 25 mandibular prognathism patients before surgery (T0), 2 months after surgery (T1), and 6 months after surgery (T2). The positional displacement of the hyoid bone was assessed using the coordinates at T0, T1, and T2. Additionally, the volume of each subject's pharyngeal airway was measured. RESULTS: The mean amount of posterior maxilla impaction was 3.76 ± 1.33 mm as the palatal plane rotated 2.04° ± 2.28° in a clockwise direction as a result of bimaxillary surgery. The hyoid bone moved backward (P < .05, P < .001) and downward (P > .05, P < .05) at 2 months and 6 months after surgery, while the total volume of the pharyngeal airway significantly decreased at the same time points (P < .001, P < .001). There was significant relationship between the changes of the hyoid bone position and airway volume at 2 months after surgery (P < .05). The change of the palatal plane angle was positively correlated to the decrease in the total airway volume (P < .001). CONCLUSIONS: The null hypothesis was rejected. The hyoid bone moved inferoposteriorly, and the pharyngeal airway volume decreased for up to 6 months after bimaxillary surgery. The decrease in the pharyngeal airway volume was correlated to the changes in the palatal plane inclination and the positional change of the hyoid bone. SN - 1945-7103 UR - https://www.unboundmedicine.com/medline/citation/23311605/Three_dimensional_changes_of_the_hyoid_bone_and_airway_volumes_related_to_its_relationship_with_horizontal_anatomic_planes_after_bimaxillary_surgery_in_skeletal_Class_III_patients_ L2 - https://meridian.allenpress.com/angle-orthodontist/article-lookup/doi/10.2319/083112-700.1 DB - PRIME DP - Unbound Medicine ER -