Different long term research studies have shown that implants which have been placed in good bone can last for a patient's lifetime. However, some implants can fail if the quality of the bone wasn't good, if there was too much bite stress for too few implants or implants which weren't long enough for the demands of a given case. There is the need for the implants to attach to the bone by a process which was originally described as osseointegration. The length of time for this waiting period varies with the quality of bone that is present where the implants were placed. There should be no pain when the implants are placed.
Patients have feeling which ranges from discomfort to pain.
The variation depends on the number of implants placed, their location as well as a patient's tolerance for pain. Post-surgical swelling may interfere with wearing a full or partial denture immediately after the surgery or until after the swelling has gone done. Each case varies and therefore, this should be discussed with your implant surgeon. If you don't clean around the implants, they can get gum disease. Gum disease can lead to the failure of the implants if it is not treated before too much bone has been destroyed.