AGE-CHANGES IN THE VOLUME OF THE HUMAN MAXILLARY SINUS - A STUDY USING COMPUTED-TOMOGRAPHY

An understanding of the age-related changes in the volume of the norma l maxillary sinus will help to identify sinus abnormalities. Normal ma xillary sinus volume was measured on axial CT scans in 115 cases, and analysed in relation to age, the presence of premolar and molar teeth, size of the midfacial skeleton and body height and weight. The volume ranged from 4.56-35.21 cm3 (mean: 14.71 +/- s.d. 6.33 cm3) in patient s aged over 20 years. There was no significant sex difference and a cl ose correlation between the two sides was found. The volume increased up to the age of 20 years, but then decreased. There was no significan t difference in patients with and without maxillary premolars and mola rs between the ages of 50 and 79 years. The difference in right and le ft dentitions had no influence on the maxillary sinus volume over the age of 20 years. Adult maxillary sinus volume correlated with the inte rzygomatic buttress distance. In adult females, there was a significan t correlation between the volume and the zygomatic-occipital distance. In adult males, the volume correlated with body height and weight. It appears that volume changes with age might be related to skeletal siz e and physique.