Just read your story and find out you missed a major issue.
I have cured my ankylosing spondilities (type of artherities of the spine and big joints) after ten years by having a diet free of starch by carol sinclair, the starch free diet.
BUT the main thing you have missed are Cavitations, after i removed my root canals and removed one thoot dead after to big filling, only one of the three roots of the molar was dead so it looked healty when tested whit electrik pulp tester. The root and the cavitation underneat it was so toxix that my hole mouth swelled up whit blisters when pulled and it stinked like dead tissue.
Another thoot that i pulled had a cavitation the zize of the litle finger tip, i went to a normal dentist to have it pulled because it got infcted, he wanted to make a rootcanal but i insisted to have it pulled. When out i asked him spesifically to see if he could see a cavitation in the bone, wich he was not trained to see and he told me it was bleeding good so there was no problem. I of course now better and travelled the next day to my specialist dentist and he find this biggest cavitation he had seen in his carier.
I urge you to investigate if you could have a cavitation or rootcanals, or extracted pre molars etc. But you have to do this by an dentist using cavitat machine that are the only method to see all cavitations. see http://www.dentalhelp.org it is most impotant that you use a dentist who is expirienced in this if no he could make more damage. wich i have learned whit the first dentist i used.
There are only a few dentist in the world who are expiriensed in this and you can mail me if you like to some of the best that i used.