Introduction:The maxillary sinus both affects and is affected by orthodontic treatment thus knowledge about it is of great value. With the emergence of Cone-beam computed tomography (CBCT) studying the maxillary sinus became more accurate. Aim: to find out if there is a correlation between the maxillary sinus volume and facial pattern in adults using cone beam computed tomography. Methods: Cone-beam computed tomography (CBCT) scans of 36 adults were obtained. They were divided equally into three groups: Normal facial pattern, hyper-divergent facial pattern and hypo-divergent facial pattern. The volume of the maxillary sinus on both the right and left sides were measured in each group using OnDemand3D software program.
Results:The results of this study were that there is no significance difference between the maxillary sinus volume in the different groups of facial pattern. There is no significance between the volume of the maxillary sinus on the right and left side. Conclusions: There is no correlation between the maxillary sinus volume and the vertical growth pattern. The right and left maxillary sinus are corresponding to each other in volume.