The greatest risk following the surgical procedures is that the implant will fail. For implants placed within the bone, most failures occur within the first year and then occur at a rate of less than one percent per year thereafter. Location of the implant can also predict the risk of failure. Implants in the back upper jaw fail most often, followed by the front upper jaw, the back lower jaw, and the most success seen in implant of the front lower jaw.
A further consideration as to suitability for implants is the patient's general health. The following factors can risk the success of inserting implants:
- Insufficient bone supply at the implantation region (Osteoporosis)
- Heavy smoker
- Bad oral hygiene
- Severe diabetes mellitus with high blood sugar levels.