Medical and Dental Sciences are rapidly changing with new scientific revelations unveiling many mysteries with each passing day. Lasers have become an integral part of treatment in both the medical and dental fields. This book contains each and everything on lasers including basic fundamentals to their clinical applications along with the references. This book has been written after analyzing more than 250 articles on the subject and is compiled in such a way that the book will help the medical and dental professionals, students and others to reorganize the factual knowledge of the subject. The clinical studies have also been included after critical evaluation. The references are given, so that the readers can further consult the articles of their interest. This book is intended for the acquiring basic knowledge about lasers and their roles in medical and dental practice.