Dental implant failures can be biologic, mechanical, or esthetic, occurring when the implant no longer functions as intended. Early failures often stem from surgical or biologic issues like poor osseointegration or infection, while late failures are commonly linked to technical or mechanical complications. Esthetic failures affect appearance and patient satisfaction, sometimes developing over time. Accurate diagnosis involves clinical, radiographic, and patient-reported assessments. Effective prevention relies on thorough planning, precise surgery, careful restoration, and ongoing maintenance. This review categorizes implant failures into surgical, restorative, and esthetic phases for a clearer clinical understanding.