Dental implants have become one of the mainstream treatment options. As the number of dental implants increases, dentists will inevitably face implant failure and related complications. When the implant fails, it could be osseointegrated or completely lost osseointegration. Sufficient professional knowledge and communication skills is required to inform patients of all possible treatments after implant failure, and provide them with the most suitable treatment options. Therefore, this article will review the reasons for implant failure, removal techniques, and retreatment considerations in the literature for osseointegrated implants.