Without an examination, it is impossible for me to give you a proper answer. The first thing that usually comes to mind is stain from tea or coffee. This can be removed very readily by your dentist/hygienist. Other reasons such as tetracycline staining take years to form and do not happen over night.
The best suggestion that I can give you is to go and see your dentist. Make sure that your hygiene is excellent and have your dentist make sure that all is OK with your teeth.
The problem IS NOT with the X-rays, but it is with your level of trust of the dentist. Doing and redoing work without a proper diagnosis is the problem. Before doing anything, the source of the abscess has to be determined.
X-rays are necessary in order to arrive at a proper diagnosis. The level of radiation is incredibly minor and should not be a major concern, unless you were exposed to severe doses in the past (cancer therapy, etc.).
If your dentist is just re-doing root canals without knowing the source of the abscess, the X-rays are not the problem.
Go to an Endodontist (a root canal specialist) and get a diagnosis and a source for the infection BEFORE anything else is done.
Unless you were exposed to severe doses of radiation, such as cancer treatment or a nuclear accident you have nothing to worry about. Today's X-rays systems, especially when digital (on a computer) are given with such a low dose that they are essentially insignificant. You receive more radiation taking a flight or walking down the street on a sunny day.
The damage from neglecting your teeth and not getting proper care is FAR worse than any radiation you are getting.
Calm down, go for the proper treatment, get the care that you need, and Yes, you can and should express your concerns to your dentist/hygienist. It is their job to answer your questions and reassure you. They should not take offense to that. It is YOUR health care and you should understand everything that is being done.
The internet is available for anyone to write anything. The fact that it is "there" does not mean that it is right or that anyone else but you is reading it. Most "hysteria" articles about any substance should be coming from a refereed, industry journal, not from the national inquirer, or a celebrity blog.
The main point of oral hygiene is getting the bacterial plaque off your teeth. The only way to do this is by the physical actions of BRUSHING and FLOSSING. Tooth paste IS NOT needed to complete the action.
Tooth paste is used to lubricate the brush so that the action is not "dry", as well as deliver very minor amounts of fluoride to the tooth surface.
The effects of tooth paste come into play ONLY if your brushing and flossing are immaculate. It is as if you were worried about whether it is better to run in special running shoes or tennis shoes, while sitting on the couch eating ice cream and chocolate. The important thing to do is to have a proper diet and exercise. Whether you run 4 or 5 miles is inconsequential.
Brush and Floss your teeth. Use whatever tooth paste you like (I personally choose one based upon the flavor--I like mint), If you want to rinse, that is fine too. Just make sure to go to your dentist and have your brushing technique checked when you go in for a professional cleaning (at least every 6 months).
It is very difficult to try and diagnose the problem over the internet, however, it is very possible for a tooth to experience symptoms when on the X-ray it looks as if the root canal treatment is properly done. Remember that an X-ray is only a two dimensional representation for the tooth and sometimes can look perfect. However, if a special limited field dental scan (cone beam) is taken, an unfilled canal can be found or a fracture line that cannot be seen on the X-ray. In addition, you are right that the symptoms can be from another tooth and the pain is just referred.
The best advise that I can give you is to go to the specialist in this area, the Endodontist and get a second set of eyes and another brain looking at the situation. www.aae.org will have a link to an Endodontist near you, or just ask your dentist for a referral. It is always good to get a second opinion. Do nothing until you know what the diagnosis is.
I am sorry to hear that you have these issues. However, it is good that you are finally taking responsibility and want to do something about it.
The best way to proceed is to locate a Prosthodontic department in a local dental school. Go in for a proper consultation and get a proper treatment plan.
The dental plan coverage is usually very limited, and since they pay the dentist a very little amount, it is very difficult for the dentist to spend the required time with you to come up with a proper treatment plan. Most treatment ends up haphazard, and the result is what you have already.
There are ways to finance dental treatment and I am sure that the dental school will be able to help you with that as well.
I am so sorry to hear about your fall. It is very difficult for me to give you an opinion over the internet without an examination. You MUST speak to your dentist an have him/her explain the findings on the x-rays and clinically.
I can also recommend that you have the dentist take professional photos of your teeth as a base line. I typically charge a nominal fee from new patients, but my existing patients do not get charged.
If your dentist does not do that, consider going to a Prosthodontist, or a high quality general/family/cosmetic dentist in your area.
Hopefully, your teeth have not suffered great trauma and will be back to normal.
I don't know where you are and how difficult is your access to care, but you must see a medical professional. Go to a local emergency room, physician, dentist, or anyone who can look at you and prescribe antibiotics until you receive care.
No, this is not normal. When a tooth is "hot", inflamed, the inflammation itself can stop the anesthetic from working properly. However, there are techniques to counter act that.
You might want to ask your dentist for a referral to an Endodontist who is the expert in this area. The Endodontists learn exactly that: how to handle patients who are in extreme pain from inflamed teeth. www.aae.org will have a link to an Endodontist near you.