"Welcome to the second edition of Practical Periodontal Diagnosis and Treatment Planning, skilfully edited by Serge Dibart and Thomas Dietrich. This edition delves into the foundational principles of periodontal and dental implant therapy, with a focus on processes that culminate in accurate diagnoses and well-rounded, pragmatic treatment planning. The methodology embraced is evidence-based, retaining the integrity of the first edition, while also offering a refreshingly practical approach. The reader is guided systematically from risk assessment through minimally invasive therapies to rehabilitation, whether through surgical tissue regeneration or dental implant therapy. This edition confronts the complexities of the 2017 International Workshop Classification of Periodontal and Peri-implant Diseases and Conditions. It contrasts the new system with the 1999 classification, enlightening readers on the rationale and evolution that led to what is now known as the 2018 Classification. The reader is provided with a hands-on guide to implementation in day-to-day practice, along with comprehensive explanations of the radical changes in thinking that shaped the 2018 classification. The book features three new and very engaging chapters. The first explores the classification topic mentioned above, the second delves into the rapid emergence of digital systems within dental practice. These systems now form the crux of three-dimensional planning in dento-facial aesthetics, extending beyond mere "in-silico" modelling by interfacing with contemporary recording techniques for dento-facial parameters, and transitioning through to innovative methods of implementation such as dynamic surgery with navigation and robotic placement systems. The final chapter on prosthetic rehabilitation, employing digitised systems, actualizes the initial planning and fulfils the patient care circle. The third fresh chapter examines a subject of great contemporary relevance: the human pursuit of beauty and the harmonization of facial features. These considerations have increasingly become essential to the well-being and self-confidence of many individuals in the 21st century. The chapter delves into the meticulous knowledge and appreciation of applied facial anatomy, risk-benefit assessment, and the critically important concept of informed consent, required for the successful implementation of various facial tissue management strategies. Although the impact of such interventions can be transformative, a clear understanding of the risks, side effects, and psychological effects of facial remodelling is emphasised"-- Provided by publisher.