Changes in Maxillary Sinus Volume and Mucosal Thickness Post Bimaxillary Advancement Procedures: A Retrospective...

Area of Science:

• Cranio-maxillofacial surgery
• Orthognathic surgery
• 3D imaging analysis

Background:

• Bimaxillary surgery corrects complex maxillomandibular disorders, malocclusion, and facial asymmetry.
• Surgical osteotomies can alter surrounding craniofacial structures, including maxillary sinuses.
• Understanding these anatomical changes is crucial for surgical planning and outcomes.

Purpose of the Study:

• To evaluate changes in maxillary sinus volume and mucosal thickness following maxillomandibular advancement (MMA) surgery.
• To investigate the correlation between maxillary advancement and alterations in maxillary sinus dimensions.

Main Methods:

• Prospective study of 25 patients undergoing MMA surgery.
• Preoperative and 6-month postoperative CT scans analyzed for maxillary sinus volume and mucosal thickness.
• Quantification using specialized medical imaging software.

Main Results:

• A statistically significant reduction in maxillary sinus volume was observed post-MMA (p=0.015).
• No significant change in median maxillary sinus mucosal thickness.
• Increased SNA angle, with a weak negative correlation between SNA change and maxillary sinus volume change.

Conclusions:

• Maxillomandibular advancement surgery leads to a reduction in maxillary sinus volume.
• The extent of maxillary forward repositioning may influence the degree of maxillary sinus volume reduction.