This lovely chap has been in our clinic for dental and sinus surgery. He had two fractured cheek teeth, one of which resulted in a secondary sinusitis as the tooth root communicates with the sinuses in younger horses. 

He has had both affected teeth removed and has had a catheter placed in his right frontal sinus to allow us to flush out the infected matter for a few days and ensure he recovers fully. The small hole through which the catheter is placed is also used to access the sinus with a flexible endoscope, seen in the images above. 

He is doing well and will be home soon.