Once the implant is in place, you do need to wait a couple of months for the osseointegration period to finalize. Even if it's uncommon, sometimes the implant doesn't integrate with the jawbone. Instead, fibrous tissue between the bone and the implant appears in its place, preventing the union of both. This is called implant rejection. There are two main symptoms that can indicate implant rejection: 1 - Implant mobility. Implant mobility is pretty much what it sounds like. Your implant may feel somewhat like a loose tooth in your mouth, and it can move around in your mouth when you eat or talk. Usually, the dentist notices this when the patient comes in for their consultation three months after the dental implant placement. 2 - Inflammation or pain. Most of the time, patients do not feel pain following the placement of a dental implant, but sometimes an infection (accompanied by foul discharge and bad breath) occurs with the loss of bone surrounding the implant. This is called peri-implantitis, and it’s typically accompanied by inflammation and sometimes pain.