CBCT Analysis of the Hyoid and Pharyngeal Airway Changes in Class III Patients With Orthognathic Surgery
Year: 2024
Type: article
Study design: Observational Study
Abstract: 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.
DOI: 10.1111/ocr.12881
Authors: Si‐Mai Chen, Hua‐Yang Cai, Xing‐Zhi Yan, Jie‐Li Ni, Li‐Ran Wang, Chen‐Jie Cai, Qi Cai, Dong‐Dong Wan, Ya‐Jing Qian, Wei‐Wen Fang, Fan Lei, Yang Zhang, Shu‐Yu Guo, Peter A. Mossey
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: bronze
Awards: G4589666142, G559187235
OpenAlex ID: W4404964218