Periodontal Medicine is an upcoming branch of dentistry which deals with the oral systemic link. It offers new insights into the concept of the oral cavity as one system interconnected with the whole of human body. Any infection in oral cavity has potential to affect organ systems through systemic circulation. This book high-lights the importance of oral systemic link in general and oral cardiac link in particular. This forerunning compilation is an effort to describe the scientific advances and highlights the connections between a number of oral microbial infections and major cardiac diseases. Given the importance of oral health to overall health and well being, it is critical that oral disease prevention and treatment be an integral component of national and community health promotion initiatives.