Awareness of the important role that peri-implant tissue health plays in implant survival is growing, in part because clinical studies that assess long-term results of implant treatment show that peri-implantitis is no longer a rare complication. This book positions peri-implantology as an emerging discipline and provides a comprehensive discourse on the etiology, clinical features, and diagnosis of peri-implantitis and implant mucositis. Based on more than a decade of dedicated research and clinical focus on peri-implantology, this book presents predictable surgical and nonsurgical protocols that go beyond the current treatment guidelines that were largely adapted from therapies for periodontal disease. The author summarize the current research on peri-implantitis and outline the steps for effective early diagnosis. By focusing on identifying the multiple risk factors, the authors provide an effective paradigm for preventing peri-implant infection in everyday practice.