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Dentomaxillofacial Radiology, Vol 29, Issue 5 280-285, Copyright © 2000 by British Institute of Radiology

ARTICLES

Comparison of the panoramic radiographic and CT features of post-Caldwell-Luc maxillary sinuses

T. Ohba, Y. Morimoto, Y. Nagata, T. Tanaka and S. Kito
Department of Dental Radiology, Kyushu Dental College, Kitakyushu, Japan.

OBJECTIVE: To clarify the panoramic radiographic features of the post-Caldwell-Luc maxillary sinus. METHODS: The panoramic radiographs were compared with the axial CT scans of 48 symptomatic post-Caldwell-Luc maxillary sinuses which had been operated on more than 5 years previously. RESULTS: The two characteristic features of the post-Caldwell-Luc maxillary sinus on panoramic radiographs were a right-angled triangular shape, due to absence of the floor of the maxillary sinus and radiopacity of the posterior wall and zygomatic bone, and an ill-defied panoramic innominate line. This shape was related to the finding of a contracted sinus with a radiolucent lumen on the CT scans. There was also close relationship between the ill-defined panoramic innominate line and thickened posterior wall on the CT scans. CONCLUSION: The characteristic features of the post-Caldwell-Luc maxillary sinus on panoramic radiographs were a right-angled triangular shape and an ill-defined panoramic innominate line. These features were related to a contracted sinus and a thickened posterior wall on the CT scans.




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