Root canals and sinus infections

[Gerrie]

After a doctor treating me unsuccessfully for allergies for over a year, I finally went to a eye, ear, nose and throat doctor who diagnosed me as having a severe sinus infection. Later on, I had to have a root canal in an upper tooth. Now I'm wondering if the sinus infection were caused by the diseased tooth roots? Is this a possibilty?

 

[comfortdentist]

possible seen it before