CBCT Analysis of the Hyoid and Pharyngeal Airway Changes in Class III Patients With Orthognathic Surgery

TY - JOUR

T1 - CBCT Analysis of the Hyoid and Pharyngeal Airway Changes in Class III Patients With Orthognathic Surgery

AU - Chen, Si Mai

AU - Cai, Hua Yang

AU - Yan, Xing Zhi

AU - Ni, Jie Li

AU - Wang, Li Ran

AU - Cai, Chen Jie

AU - Cai, Qi

AU - Wan, Dong Dong

AU - Qian, Ya Jing

AU - Fang, Wei Wen

AU - Lei, Fan

AU - Zhang, Yang

AU - Guo, Shu Yu

AU - Mossey, Peter A.

N1 - Publisher Copyright: © 2024 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

PY - 2024/12/3

Y1 - 2024/12/3

N2 - Aim: This study was designed to investigate the response of the respiratory structures to orthognathic surgery in patients with Class III malocclusion, with a specific emphasis on the vertical placement of the hyoid bone. The correlations of these changes were also analysed, followed by further subgroup analyses based on preoperative conditions. Materials and Methods: Dolphin software was used to obtain cephalometric landmarks, airway and hyoid bone measurements from pre- and postoperative CBCT scans of 31 patients. Statistical analyses included paired t-tests and Pearson's correlation analysis. Results: Stomatological mandibular values and the nasopharynx height showed significant changes. Pearson's correlation identified significant correlations between changes in B and H horizontal coordinates (p < 0.05), as well as between changes in H longitudinal coordinates and specific airway dynamics (p < 0.05). Patients with a lower preoperative hyoid position experienced a more pronounced decrease in hypopharyngeal airway volume after surgery compared to those with a higher preoperative hyoid position, as evidenced by the significant mean differences and p values (p < 0.01). Conclusions: Class III patients experienced airway constriction following orthognathic surgery, particularly those with a lower preoperative hyoid bone position, who showed a more significant decrease in hypopharyngeal airway volume postsurgery compared to those with a higher preoperative hyoid position. These findings underscored the importance of individualised surgical planning and highlighted the need for further research with dynamic assessments to optimise respiratory outcomes.

AB - Aim: This study was designed to investigate the response of the respiratory structures to orthognathic surgery in patients with Class III malocclusion, with a specific emphasis on the vertical placement of the hyoid bone. The correlations of these changes were also analysed, followed by further subgroup analyses based on preoperative conditions. Materials and Methods: Dolphin software was used to obtain cephalometric landmarks, airway and hyoid bone measurements from pre- and postoperative CBCT scans of 31 patients. Statistical analyses included paired t-tests and Pearson's correlation analysis. Results: Stomatological mandibular values and the nasopharynx height showed significant changes. Pearson's correlation identified significant correlations between changes in B and H horizontal coordinates (p < 0.05), as well as between changes in H longitudinal coordinates and specific airway dynamics (p < 0.05). Patients with a lower preoperative hyoid position experienced a more pronounced decrease in hypopharyngeal airway volume after surgery compared to those with a higher preoperative hyoid position, as evidenced by the significant mean differences and p values (p < 0.01). Conclusions: Class III patients experienced airway constriction following orthognathic surgery, particularly those with a lower preoperative hyoid bone position, who showed a more significant decrease in hypopharyngeal airway volume postsurgery compared to those with a higher preoperative hyoid position. These findings underscored the importance of individualised surgical planning and highlighted the need for further research with dynamic assessments to optimise respiratory outcomes.

UR - https://www.scopus.com/pages/publications/85211129941

U2 - 10.1111/ocr.12881

DO - 10.1111/ocr.12881

M3 - Article

C2 - 39625297

AN - SCOPUS:85211129941

SN - 1601-6335

JO - Orthodontics and Craniofacial Research

JF - Orthodontics and Craniofacial Research

ER -