After tooth loss, individuals often seek replacements for functionality and aesthetics. Recent advancements in clinical prosthodontics have led to more effective options, including removable partial dentures, bridges, and increasingly popular dental implants. Implants restore near-normal function and stimulate bone density, preserving facial structure. While they have become a preferred solution, complications such as infection, bone loss, and failure can arise.Osseointegration, the direct integration of bone with an implant, is key to success. Implants must meet criteria for function, tissue health, and patient satisfaction. Complications can be early (e.g., infection) or late (e.g., loss of osseointegration), and distinguishing between these is crucial for treatment. Factors influencing success include genetics, occlusal stress, and overall health.This book reviews current knowledge on implant complications, emphasizing the importance of proper protocols for successful long-term outcomes.