There are a series of indications of failed implants. You can see them listed below. However, keep in mind that these do not stand with certainty. Thus, you should always be in constant communication with your dentist.
If you experience pain due to failed implants;
There is no such thing as too much pain. If you feel radiant pain throughout your jaw, you should inform your dentist.
If there is gum swelling;
It is normal to experience swelling in the gum. However, they should not be staying swollen. Also, it should not spread. If you see redness around the operated area, it may be an indication of an infection. You should see your dentist on the same day.
If you are experiencing trouble chewing;
The main goal of dental implant treatment is to provide one as functional as a natural one. Thus, you should not feel pain after your recovery when eating or chewing. Pain, in this context, can also be an indicator of a cavity in a natural tooth as well. If you do, it would be best for you to see your dentist.