Do you know how to read a dental ct? Is my third tooth a nerve injury? If it is, how much will it cost to fill the tooth?

This should be an X-ray, not CT, X-ray can only look at the bone, that is, to see the teeth to what extent, the nerve can not be seen, but you should have a feeling ah, if you eat sweet pain, that means that has been to the nerve, the fillings are generally not expensive, may be tens of dollars will be enough, and if the teeth to set a porcelain set that is expensive, it may be thousands of dollars, the bad a little bit of general, a little filler! The first thing you need to do is to get your hands dirty.