A 2-Year Follow-Up of Changes After Bimaxillary Surgery in Patients With Mandibular Prognathism: 3-Dimensional Analysis of Pharyngeal Airway Volume and Hyoid Bone Position

2015 ◽  
Vol 73 (2) ◽  
pp. 340.e1-340.e9 ◽  
Author(s):  
Je-Hwa Shin ◽  
Min-Ah Kim ◽  
In-Young Park ◽  
Yang-Ho Park
Keyword(s):  
Dimensional Analysis ◽  
Hyoid Bone ◽  
Mandibular Prognathism ◽  
3 Dimensional ◽  
Pharyngeal Airway ◽  
Bimaxillary Surgery

scholarly journals 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

2013 ◽  
Vol 83 (4) ◽  
pp. 623-629 ◽  
Author(s):  
Min-Ah Kim ◽  
Bo-Ram Kim ◽  
Jin-Young Choi ◽  
Jong-Kuk Youn ◽  
Yoon-Ji R. Kim ◽  
...  
Keyword(s):  
Hyoid Bone ◽  
Three Dimensional ◽  
Class Iii ◽  
Mandibular Prognathism ◽  
Skeletal Class ◽  
Dimensional Changes ◽  
Pharyngeal Airway ◽  
Posterior Maxilla ◽  
Computed Tomography Scans ◽  
Bimaxillary Surgery

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.

Three-dimensional analysis of the pharyngeal airway space and hyoid bone position after orthognathic surgery

2017 ◽  
Vol 45 (9) ◽  
pp. 1408-1414 ◽  
Author(s):  
Amanda Lury Yamashita ◽  
Liogi Iwaki Filho ◽  
Pablo Cornélius Comelli Leite ◽  
Ricardo de Lima Navarro ◽  
Adilson Luiz Ramos ◽  
...  
Keyword(s):  
Dimensional Analysis ◽  
Orthognathic Surgery ◽  
Hyoid Bone ◽  
Three Dimensional ◽  
Pharyngeal Airway

Head posture and pharyngeal airway volume changes after bimaxillary surgery for mandibular prognathism

2014 ◽  
Vol 42 (5) ◽  
pp. 531-535 ◽  
Author(s):  
Min-Ah Kim ◽  
Bo-Ram Kim ◽  
Jong-Kuk Youn ◽  
Yoon-Ji R. Kim ◽  
Yang-Ho Park
Keyword(s):  
Volume Changes ◽  
Mandibular Prognathism ◽  
Head Posture ◽  
Pharyngeal Airway ◽  
Bimaxillary Surgery

scholarly journals Changes in Pharyngeal Airway After Mandibular Setback Surgery: A Retrospective Cephalometric Study

2019 ◽  
Vol 53 (4) ◽  
pp. 256-263
Author(s):  
Jayshree D. Daryanani ◽  
N. Vijay ◽  
K. Sadashiva Shetty ◽  
Riddhi Chawla
Keyword(s):  
Soft Palate ◽  
Sagittal Split Ramus Osteotomy ◽  
Mandibular Prognathism ◽  
Pharyngeal Airway ◽  
Mandibular Setback ◽  
Mandibular Setback Surgery ◽  
Cephalometric Study ◽  
Base Of The Tongue

Aim: To cephalometrically evaluate the alterations taking place in the pharyngeal airway space, hyoid bone, soft palate, and head posture after mandibular setback surgery (bilateral sagittal split osteotomy) for correction of mandibular prognathism, as well as to evaluate the immediate postsurgical and more than 6 months postsurgical adaptations of these structures. Setting and Design: A retrospective cephalometric study. Materials and Method: The study group consisted of 40 nongrowing patients (20 females and 20 males) with mandibular prognathism and ANB less than or equal to –2 degree for which mandibular setback surgery by bilateral sagittal split ramus osteotomy was performed along with fixed appliance therapy. There presurgical (T1), immediate postsurgical (T2), and more than 6 months postsurgical (T3) lateral cephalograms were analyzed. Statistical Analysis Used: Intragroup comparison was done by paired t-test. Results: Skeletal measurements after orthognathic surgery remained stable in the long term. It was evident that mandibular setback surgery narrowed the pharyngeal airway; however, these changes were not significant except at the base of the tongue. During the follow-up airway measurements at the base of the tongue, the intersection of tongue at the inferior border of mandible and the vallecula increased but they did not reach the presurgical values. Soft palate length increased significantly after surgery. Angulation of soft palate to nasal line also increased significantly following surgery but decreased during follow-up. Extension of the head occurred after surgery which was maintained even at long term. Conclusion: Careful analysis of airway should be performed, particularly in connection with large anteroposterior discrepancies and in those who have risk factors for development of obstructive sleep apnea. Such cases should be corrected by combined maxillary and mandibular osteotomies.

scholarly journals Evaluation of Hyoid Bone Position and Pharyngeal Airway Morphology before and after Orthognathic Surgery for Mandibular Prognathism

2015 ◽  
Vol 25 (3) ◽  
pp. 201-206 ◽  
Author(s):  
MISUZU SUZUKI ◽  
SATOSHI UZUKA ◽  
NAOKO WATANABE ◽  
WATARU MIYASHITA ◽  
TAKEKI FUJISHIRO ◽  
...  
Keyword(s):  
Orthognathic Surgery ◽  
Hyoid Bone ◽  
Mandibular Prognathism ◽  
Pharyngeal Airway ◽  
Before And After ◽  
Airway Morphology
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