Regeneration medicine, in particular that using stem cells, has received considerable amount of attention in recent years and also in field of Periodontology, in which bone regeneration is biologically possible but many times clinically unpredictable. The science of stem cells therapy has potential to lead to treatments for major degenerative diseases, by providing healthy cells to replace diseased tissues and organs. Stem cell therapy can also be used to deliver healthy genes to organs with missing or defective proteins. This book is complete and detailed presentation of stem cells therapies and its role in periodontal regeneration. This book also describes the sources of stem cells and future perspectives. The promise of stem cells therapies is an exciting one, but still it¿s under research and book also entails details regarding the studies done on role of stem cells in periodontal regeneration.