Dental implants have become an integral part of contemporary dental therapy. They give an elective treatment to traditional removable prostheses or tooth supported fixed partial dentures with high survival rate & becomes a predictable treatment for replacing missing teeth.Dental implants has dramatically changed dentistry & significantly improved dentists ability to provide tooth replacement options for patients. Despite its long-term predictability and success, implant-related risk factors and failures happen in some cases. A risk factor is defined as "any characteristic, behavior or exposure with an association to a particular disease." Risk factors can be surgical, biologic, mechanical or aesthetic. Some factors are relatively minor and easy to manage, but others are more significant and challenging to resolve if they remain same or untreated can result in failure of dental implant.Implant failures are a multi-factorial and complex problem. It is important to understand which patient and implant factors are more likely to adversely affect an implant's success.