For a tooth decayed to the root, it is first necessary to take an X-ray of the tooth. If the X-ray shows that the root still has some salvage value, the tooth can be preserved through root canal treatment after controlling the inflammation. If the decay has reached the tip of the root and the root has no salvage value, the tooth needs to be extracted soon after controlling the inflammation. After the tooth is extracted, it is necessary to get a dental prosthesis as soon as possible depending on the condition of the tooth. If the prosthesis is not done in time, the tooth above may elongate, and the teeth on either side may tilt towards the gap, potentially leading to the loss of space over time.