The simply answer to long-term success rate of dental implants are that dental implants can fail, but fortunately very in frequently.
Failure rates vary depending on the site in the mouth. The overall success rate is 95% as documented after long research. at the moment we can only say that the first patient who had dental implants placed in 1965 has his original implants in function today.
The best steps to take avoid encountering ailing or failing implants are to maintain meticulous oral hygiene, and evaluate the dental implants both clinically and radio graphically at frequent recall visits with your dentist.