Sorry to hear this.
I think you have been treated badly when you say "One of them was so rotten that it was impervious to anasthetic, so the surgeon had to bring in a hygenist with a strong grip to hold my head steady while she ripped it out."
They should never have done this to you.
I would like to share an experience with you.
I used to use a dentist with an in house surgeon.
I had a really rotten tooth, it was painful, it was a root canal filled, and the dentist who did my checkup said I would need to see the surgeon to have it removed.
On the day of the surgery, the first numbing injection did not work, nor did the second, and when I asked for a third, the surgeon got quite irritable and asked if I had taken my antibiotics.
I told him I was not prescribed any.
I hear that local anaesthetics do not work on active infections.
The surgeon then told me I had to breathe in and out when he told me to, which I did, and the extraction was completely painless, in effect, he was telling me to do a breathing meditation.
Breathing meditation meant that the local anaesthetics I had to get my toenails removed were absolutely painless, anyway I digress, you should have been prescribed antibiotics, to kill the infection, then the numbing agent would have worked. The experience must have been very painful for you.
I really do hope that the rest of your treatment goes well.
I remember being given a denture, at the time I was a real wuss.
I was so scared and nervous that I kept gagging when the dentist put the stuff there and make the mould off into my mouth, so that the impression was wrong and the denture did not fit and I gave up on it.
On a more positive note I know people who have been fitted with dentures and have got used to them. My late dad had all of his teeth taken out when he was 18 and he had no trouble with dentures. He still has a nice smile and in my opinion you would not know he had dentures.