You’re welcome! Thank you for your detailed answers to my questions. That’s really helped me understand what’s happening so now I can explain it to you a little better.

First let me explain periodontal disease. It’s a progressive disease that starts out with inflammation around the gum line. In a healthy mouth, gum tissue comes up to form a little protective cuff around the tooth. Over time, food and bacteria can collect under that little cuff and cause irritation if it’s not cleaned out daily with flossing and brushing.

The material that builds up is called plaque. It is very hard, brittle material and eventually keeps building, pushing the tissue out of the way and destroying the bone around the tooth. When that happens teeth become loose and are lost. It can happen to just one tooth or be widespread and effect several or all teeth. Periodontal disease can also contribute to other serious health issues such as heart problems and diabetes.

In your case, your bone loss was significant, creating large, deep pockets around your upper molars which held bacteria causing infections. That apparently migrated to your sinuses. With the teeth removed that area will heal over and your sinuses should be better.
The goal is to eventually have the sockets fill in with bone growth and be able to support an anchor for implanting new teeth. The same with your lower molars which were lost, though they don’t impact the sinuses. I’m not sure what the packing is. Are you talking about bone grafting?

In my opinion I’d really suggest that you do not cancel the appointment with the periodontist. He/she will work together with your general dentist to give you the best possible outcome to your dental situation. The periodontist specializes in treating periodontal disease and bone loss.
An MD is not the person to see for dental health. They would refer you back to your dentist.

I know this sounds like a lot to go through but you really don’t want to lose any more teeth or incur any more bone loss. So now, it’s really important to have regular professional cleanings, floss and brush daily to keep your mouth squeaky clean.

Why do you feel you need to see an MD?
https://www.cdc.gov/oralhealth/conditions/periodontal-disease.html