The present study aimed to determine the morphometric dimensions of crista galli (CG) with cone-beam computed tomography (CBCT), to evaluate its position relative to the cribriform plate (CP), and to examine the prevalence of pneumatized CG (PCG). CBCT images of 245 individuals aged 9-77 years were examined, retrospectively. The length, height and width of CG were measured. The position of CG relative to the CP was examined and was classified. The presence of PCG was investigated in coronal, axial and sagittal sections. CG was classified as type I, II and III, and PCG as type IP, IIP and IIIP.
PCG was detected in 5 (2.04%) of 245 patients. Type IP was observed in only 1 patient and type IIP in 4 patients. Type I CG was observed in 161 individuals (65.7%), and type II CG in 79 individuals (32.2%). Type III and type IIIP were not seen. The height, width and length of CG were 13.2 ± 2.4 mm, 4.3 ± 1.2 mm and 12.5 ± 1.7 mm, respectively. These values did not differ significantly by gender (p>0.05). PCG is an anatomical variation of the ethmoid bone. In our study, the prevalence of PCG was quite low compared to previous studies. Besides, this study showed that the length (7.8-17.6 mm), height (6.2-20 mm) and width (1.3-7.5 mm) of the CG are in a very wide range. Further research is needed to determine the morphometry of CG and to compare the prevalence of PCG effectively.