FAILURES AND COMPLICATIONS OF DENTAL IMPLANTS

Patients have experienced much success with endosseous dental implants. Yet, despite the long-term predictability and success of implants, complications do occur in a percentage of cases. Some complications are relatively minor and easy to correct, but others are more significant, resulting in loss of implants, failure of prostheses, and occasionally in severe loss of tissues in the area of implant failure. Dental implants may fail due to several reasons, it includes biologic failures (related to biologic processes), mechanical failure of the component (including fracture of the implants), component (including fracture of the implants, coatings, connecting screws and prosthesis) and an iatrogenic failure which can be defined as one characterized by a stable and osseointegrated implant, but due to malpositioning, it is prevented from being used as part of the anchorage unit.