Patient: Description of the condition (onset time, main symptoms, hospital visited, etc.): All four carious teeth are decayed, two of them have rotted into holes and only a little bit of root remains (the seventh one on the upper left and the seventh one on the lower right respectively). The doctor said that it can’t be filled and should be pulled out, but the tooth has shifted due to the lack of timely treatment, so even if it is pulled out, it may not be able to be set, so should it be pulled? The remaining one is only half left, and the last wisdom tooth on the lower right is also decaying, but these teeth basically do not hurt. But basically, these teeth do not hurt, only that they are stuffy and cannot eat hard things. When the small cavity appeared, it was filled, but in the past two years, it is bad again, and it is almost to the nerve of the tooth, and then the decay is more and more. Will there be any harm if I don’t pull out the root? I thought I should try not to pull out the tooth if I can save it. Besides, my gums bleed easily when I brush my teeth, is it easy to get infected after extraction? Besides, I am not in good health and I am thin, can I tolerate tooth extraction? Are there any negative effects of tooth extraction? I have heard that it can cause memory loss, is that true (I have seen some reports of experiments with animals to prove this)? The dentist said that my tooth is misaligned and it may not be possible to set it after extraction, but it will also shift the tooth, so is there any point in extracting it? (Does it mean that I have to pull it even if I can’t get it?) But I only have a little bit of root left in my back tooth, can I get a root canal? Is root canal treatment the best thing to do? I heard that if I pull it out and try to fix it, I need to grind down both teeth (by how much?). Is this very damaging to those two teeth and will it make them unstable in the future? But the price of dental implants is high, and I have a lot of bad teeth. And will the extraction of the roots cause other teeth to loosen? Do I need immediate treatment in this case? Because it does not hurt now. Also will a tooth that is bad to the nerve be painful and what is the best way to deal with it? If the root is not removed, will it affect the neighboring teeth and cause other teeth to decay gradually (I used to have one cavity, but now I have more and more, is it affected by it)? Is it true that if I pay attention to my oral hygiene now, I don’t need to pull it out? Also, what kind of tooth is better if I pull it out? I have a lot of confusion, based on my health and the pros and cons, what is the best way to deal with it? Please explain! Doctor: Hello, my friend! Your seventh tooth on the upper left and seventh tooth on the lower right cannot be treated with root canal if it is a stump, and it is better to extract it for the reasons that the stump may become inflamed and that it may become the site of other infections. As long as you do not suffer from serious chronic diseases and are not allergic to anesthesia, you can usually tolerate the extraction, not to mention the fact that the residual root is easier to remove. As for the claim that memory is affected, the extraction of two teeth may not have much effect, because there are no reports of memory loss due to the extraction of the whole mouth. If you can’t afford it, you can get a removable denture instead. Even if you have an eighth tooth, a fixed denture is not recommended. The remaining two need root canal treatment plus full crown restoration. A tooth that is a stump cannot be treated with root canal therapy and is best extracted for the reason that the stump may become inflamed and may become a site for other infections. These concerns are not necessary, as long as you do not suffer from serious chronic diseases and are not allergic to anesthesia, you can usually tolerate the extraction, not to mention the fact that stumps are easier to remove. As for the claim that memory is affected, the extraction of two teeth may not have much effect, because there are no reports of memory loss due to the extraction of the whole mouth. If you can’t afford it, you can get a removable denture instead. Even if you have an eighth tooth, a fixed denture is not recommended. The remaining two need root canal treatment plus full crown restoration. A tooth that is a stump cannot be treated with root canal therapy and is best extracted for the reason that the stump may become inflamed and may become a site for other infections. These concerns are not necessary, as long as you do not suffer from serious chronic diseases and are not allergic to anesthesia, you can usually tolerate the extraction, not to mention the fact that stumps are easier to remove. As for the claim that memory is affected, the extraction of two teeth may not have much effect, because there are no reports of memory loss due to the extraction of the whole mouth. If you can’t afford it, you can get a removable denture instead. Even if you have an eighth tooth, a fixed denture is not recommended. The remaining two need root canal treatment plus full crown restoration. A tooth that is a stump cannot be treated with root canal therapy and is best extracted for the reason that the stump may become inflamed and may become a site for other infections. These concerns are not necessary, as long as you do not suffer from serious chronic diseases and are not allergic to anesthesia, you can usually tolerate the extraction, not to mention the fact that stumps are easier to remove. As for the claim that memory is affected, the extraction of two teeth may not have much effect, because there are no reports of memory loss due to the extraction of the whole mouth. If you can’t afford it, you can get a removable denture instead. Even if you have an eighth tooth, a fixed denture is not recommended. The remaining two need root canal treatment plus full crown restoration.