Adults can have their last teeth extracted if they are rotten. In general, the last teeth of adults refer to wisdom teeth, also known as standing teeth, which usually erupt at the age of 16-18 years old. Due to the factors of people’s evolution nowadays, the jawbone is not as big as that of people in the past, it is easy to happen that the wisdom teeth do not have enough eruption position, and there are cases of ectopic growth and obstruction of wisdom teeth, so there are more problems occurring with wisdom teeth. When the last wisdom tooth is rotten, it is very likely that caries, pulpitis, pericoronitis of wisdom teeth and other diseases have already occurred before. If the wisdom tooth is not removed as early as possible at this time, the above conditions are likely to occur again, increasing the patient’s pain. Therefore, if the last tooth is rotten and if it is a wisdom tooth, it should be removed as early as possible.