Initially, when implants are placed, they may feel a little loose as bone does not form around the root to stabilize them.
However, if they continue to be loose after the recovery period, they may be at risk for falling.
There are many reasons for this;
Infection: Insufficient bone to initially fix the implant results in “micromovement”. For example, there may be an abscess on the tooth and the infection is left behind when the dentist removes the tooth. Normally his own immune system can clear the infection. However, it is possible for some infections to remain in the bone. Then, after the implant is placed, the bacteria present there interfere with the normal healing process, or "osseo-integration" of Professor Branemark. So, while the healing process is delayed, your body tries to bond bone to bone around the implant as it tries to fight off the residual infection.
Another source of infection is gum disease. The extracted tooth may be completely healthy, but will become loose due to gum disease.
Dental implants should not be applied before everything is ready. Bones take time to heal and form around the fixture. So if rushed, dental implants can fall out.
Poor quality products can cause problems with the delicate tissues around the implant. This can cause your body to reject the dental implant.
If any part of the dental implant becomes loose, infection may be a concern. This can happen when bacteria and debris are present between the fixture and the tissues, weakening the bone and causing the dental implant to fall out.
Insufficient bone density can be a reason why your body rejects the implant. Bone grafting can be used to create the jawbone.
There may be unforeseen biological issues that cause dental implant failure. Incorrect placement can be a reason for your dental implant to fall out.