When I had my wisdom teeth extracted 14 years ago, it resulted in a hole from my mouth into my sinus cavity. Fortunately, after a month, it closed up, but it was a bitch to eat and drink in the interim. I was instructed the same day of the surgery to rinse my mouth with water and salt. I drank it and within a few seconds of swishing, to my shock, it disappeared from my mouth... but I hadn’t swallowed a drop ! A few seconds after that, it all came cascading out my left nostril all over the sink. =8-0>