A rotten tooth with only the root left to extract will cost around $100 to $1,000, depending on the condition of the affected tooth. The cost of removing a rotten tooth with only the root left needs to be decided according to the actual situation. 1. If it belongs to the anterior area, then the cost is usually only about 100 dollars. 2. If it is in the back molar area, then the cost will probably cost around $200. 3. If the root canal has already been performed, then the difficulty of extraction is increased and it will cost around $400 to $800. 4.Rotten teeth only have roots left If it belongs to the root of a wisdom tooth, then due to the deeper location, it will raise the difficulty of extraction and may require more than $400, or can even be as high as about $1,000. It is impossible to generalize about the extraction of rotten teeth, so we recommend that patients go to the hospital in a timely manner to clarify the condition of the teeth, and then choose the appropriate treatment plan according to the individual situation, so as to estimate the cost.