How does bimaxillary orthognathic surgery change dimensions of maxillary sinuses and pharyngeal airway space?
The Angle Orthodontist, 2020•meridian.allenpress.com
Objectives To assess changes in the maxillary sinus (MS) and pharyngeal airway space
(PAS) after bimaxillary orthognathic surgery using cone-beam computed tomography
(CBCT). Materials and Methods The CBCT scans of 48 patients were divided into two
groups: group 1: maxillary advancement and mandibular setback (n= 24); group 2:
maxillomandibular advancement (n= 24). The CBCTs were acquired 1 to 2 months
preoperatively and 6 to 8 months postoperatively. A kappa test was used to determine intra …
(PAS) after bimaxillary orthognathic surgery using cone-beam computed tomography
(CBCT). Materials and Methods The CBCT scans of 48 patients were divided into two
groups: group 1: maxillary advancement and mandibular setback (n= 24); group 2:
maxillomandibular advancement (n= 24). The CBCTs were acquired 1 to 2 months
preoperatively and 6 to 8 months postoperatively. A kappa test was used to determine intra …
Objectives
To assess changes in the maxillary sinus (MS) and pharyngeal airway space (PAS) after bimaxillary orthognathic surgery using cone-beam computed tomography (CBCT).
Materials and Methods
The CBCT scans of 48 patients were divided into two groups: group 1: maxillary advancement and mandibular setback (n = 24); group 2: maxillomandibular advancement (n = 24). The CBCTs were acquired 1 to 2 months preoperatively and 6 to 8 months postoperatively. A kappa test was used to determine intra- and interexaminer agreement. Area, volume, and linear measurements of MSs and PASs obtained before and after surgery were compared using a mixed model (P < .05).
Results
All variables of the MS showed significant postsurgical reductions in both groups, except the MS length, which showed a significant increase in group 2. Volume and minimum axial area of PAS showed statistically significant postsurgical increases in both groups (P < .05).
Conclusions
Despite the reduction in the MS and the increase in the PAS, results indicated that the airway was not negatively affected after maxillomandibular advancement and maxillary advancement with mandibular setback.
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