Dentists Fault, or common?

Hi. The problem is...After the dentist takes an xray and finds that you have decay close to the root of your tooth, it will only get worse over time. Even if you don't feel anything, it is still there, just waiting to go all the way through until it reaches the nerves in the root and then, the pain is horrible. So, the dentist finds decay on your xray, the smart thing to do is try to get it out as fast as possible. When doing that, the decay could be so close to the root, that it can stir up sensitivity, and pain. The dentist will usually try to get the decay out and see if your tooth is ok.<---(best case scenario) Then, If your tooth is not ok or gets sensitivity or an abscess, that means the decay has reached the root and you must have a root c, no other option. So NO .. It is not the dentist fault that you have decay, it is not the dentist fault you are in pain, and it is not the dentist fault you need a root c. The decay was there to start with, the xray makes it very clear, trying to get it out is the right thing to do. I would have eventually reached the nerve (root) no doubt.You dentist would have been a bad dentist if they saw it and left it there. You can't "put" decay in someones tooth. It sounds like your dentist did the right thing and tried to fix your tooth the cheapest, most basic way possible to start with, but they decay was too deep and now obviously needs the root c.