The Impact of Concha Bullosa and Nasal Septal Deviation on Maxillary Sinus Volume Based on CBCT Findings

Objectives: The aim of the study was to assess the presence or absence of concha bullosa and nasal septal deviation and their impact on maxillary sinus volumes.
Methods: A retrospective study was conducted on 144 Emirati peoples who underwent CBCT scan for different reasons. There were 72 females and 72 males with mean age of 35.39＋16.9 years. Exclusion criteria included: age under 18 years, prior sino-nasal surgery. Multiple linear regression model with maxillary sinus volume as the dependent variable was done using a backward selection algorithm.
Results: Concha bullosa was detected in 37.2% of the sample, 42.5% were single unilateral and 38.8% were single bilateral and only 14.8% were multiple on both sides of nasal sinus. Nasal septal deviation was seen in 74.6% of the sample. Mild deviation was seen in 32.1% of the sample, moderate deviation was seen in 32.8%, whereas severe septal deviation was seen in only 9.2% of the sample. Concha bullosa and not septal deviation was significantly increase maxillary sinus volume of the affected side (p=0.001).
Conclusions: Although septal deviation was seen in more than two third of the sample and concha bullosa was seen in more than one third of the sample, only concha bullosa had significant impact on maxillary sinus volume.