Findings:
Mucoperiosteal thickening and complete opacification of the right maxillary sinus as well as partial opacification of the ethmoid air cells on the right. Consequential obliteration of the right-sided osteomeatal complex. The mucosal thickening expands the right antrum into the right nasal cavity.
A small osteoma is seen in the right anterior ethmoid sinus.
Minimal mucosal thickening is also seen in the right frontal sinus.
The paranasal sinuses on the left are clear.
Metal implant protruding into the right maxillary antrum post dental instrumentation of the right upper second premolar.
A cystic lesion is seen medial to the implant in the right maxilla, in keeping with dry socket after tooth extraction.
Previous bone augmentation in the floor of the maxillary sinuses bilaterally.
Implants are also seen in 22, 25 and 26 regions, mildly protruding into the left maxillary sinus, without any associated inflammation.
Nasal septum deviation to the right is seen. No polyposis.
The orbits have a normal appearance, as does the nasopharynx and visualised oropharynx.
Mastoid air cells and the middle ear cavities are clear.
Conclusion:
Chronic frontal ethmoid and maxillary sinusitis on the right, likely odontogenic in nature. No polyposis.