| Skull pneumatization is probably the most difficult technique to learn, stemming from the fact that many trainees do not know exactly what they are looking for and that it is simply hard to see. |
| In the summer and early fall, when most young birds are just beginning the pneumatization process, it is good to start at the rear and the side of the skull, working up towards the crown. |
| The etiology of maxillary hypoplasia is unknown, and the process by which abnormal pneumatization occurs is not well understood. |
| Computed tomography showed extensive pneumatization of the sphenoid sinus into the pterygoid process. |
| Many common anatomic variations in the nasal cavity have been observed, including paradoxical turbinates and pneumatization of the inferior, middle, and superior turbinates. |
| A consideration of the systemic factors that influence frontal sinus pneumatization. |
