Application of Computational Fluid Dynamics Analysis after Bimaxillary Orthognathic Surgery

Bimaxillary orthognathic surgery is widely used to treat skeletal class III malocclusion. Changes in jaw position affect the shape of surrounding soft tissues. We used computational fluid dynamics (CFD) simulation to observe changes in airways observed in a patient who underwent bimaxillary orthogna...

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Bibliographic Details
Published in:Applied sciences 2020-03, Vol.10 (5), p.1676
Main Authors: Song, Jae Min, Seo, Heerim, Choi, Na-Rae, Yeom, Eunseop, Kim, Yong-Deok
Format: Article
Language:English
Subjects:
2 jaw surgery
Aerodynamics
Air flow
airway change
bimaxillary orthognathic surgery
computational fluid dynamic simulation
Computational fluid dynamics
Computed tomography
Computer applications
Computer simulation
Epiglottis
Fluid dynamics
Hydrodynamics
Oropharynx
Patients
Pressure
Pressure drop
Pressure gradients
Shear stress
Simulation
Sleep apnea
Soft tissues
Stress analysis
Surgery
Turbulence models
Velocity
Volumetric analysis
Vortices
Wall shear stresses
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Summary:Bimaxillary orthognathic surgery is widely used to treat skeletal class III malocclusion. Changes in jaw position affect the shape of surrounding soft tissues. We used computational fluid dynamics (CFD) simulation to observe changes in airways observed in a patient who underwent bimaxillary orthognathic surgery. For CFD simulation, we performed cone beam computed tomography (CBCT) preoperatively (T0), 3 days postoperatively (T1), and 7 months postoperatively (T2). The values of velocity, pressure drop (ΔP), and wall shear stress all increased 7 months after surgery (Vmax 7.038 m/s to 12.054 m/s, ΔP −7.723 Pa to −53.739 Pa, WSSmax 4.214 Pa to 14.323 Pa). Locations where the velocity and pressure gradients are large included the velopharynx, oropharynx, and epiglottis, with narrow cross-sectional areas. Wall shear stress was also observed at these locations. The velopharynx, oropharynx, and epiglottis are structures most vulnerable to morphological changes, that is, they can easily become obstructed.
ISSN:2076-3417
2076-3417
DOI:10.3390/app10051676