This book is written to help dental students in getting an ease access to the world of Periodontology. I meant to write this work in a different way, it did not follow the sequence regularly present in available books. I tried to explain how it is of great importance to take every single information from our patients to analyse it which can help us in reaching correct final diagnosis in no time with least efforts and save our resources. How to deal with systemic patients with periodontal diseases in a safe way is very important it is also discussed here.