This book provides an insight of the dentistry condition of treatment failure and its managements Failure in the form of Caries, Aesthetic Porcelaim Fracture, Perforation of tooth, Periodontal breakdown Cementation failure leads to discomfort to the patient. The diagnosis of failure clinical and symptomatically also important. Failure occur due to Bological Mechanical, Psychological and Laboratory procedure. Failure maintenance like Crown and Bridge removal technique mention in this book, hence this should be routinely evaluated to prevent failure of prosthesis