I am 100% NPO. I did get aspirated pneumonia back in my "dumb" days when I was eating. I have had a lot of dental work lately. As I mentioned, they are always ready for my coughs!!!. Als0. I could be wrong about this but I think aspirated pneumonia is most often food stuff going into your lungs. Of course saliva can cause it but maybe rinsing with germ killing mouthwash before the dental work begins will lessen the chance the problem. Talking to the dentist with your concerns may be a great first step.

I hope it turns out fine for your hubby
Steve