Tremendous advances in the field of laser dentistry have occurred with a technology breakthrough that gives dentists the capability to perform a wide range of hard-and-soft tissue procedures with improved patient outcomes, less trauma, reduced post-operative complications and in most cases, with no need for injections. This new technology greatly expands the scope of procedures a dentist can offer their patients. This book describes the fundamentals of laser physics, laser delivery system, principles of laser-tissue interaction, and different absorption characteristics of dental tissue by laser energy. This book will help undergraduate, postgraduate students and clinicians to understand the concepts so that treatment objectives can be accomplished safely and effectively.