Certain medical conditions, such as cancer, hemophilia, diabetes, and autoimmune disorders, can make a person ineligible for dental implants. These illnesses can interfere with the healing process and even lead to serious infections after the procedure. But the most common reason why someone may not be a suitable candidate for implants is due to bone loss. If a patient has experienced significant bone volume loss, either due to illness or the prolonged absence of natural teeth, there may not be enough bone to support an implant.
Unless we can restore this lost bone volume through grafting, we will need to consider another type of restoration. Poor oral health habits can also make someone an unsuitable candidate for dental implants. If they have poor oral health with their natural teeth, they are not likely to improve with implants. Poor oral health is mainly related to poor oral hygiene. Someone who doesn't brush regularly and allows their teeth and gums to deteriorate without doing anything is not an ideal candidate. Finally, certain physiological and mental health conditions can make placing dental implants unsafe for people who have them.
These conditions can make someone ineligible for dental implants.