The book "Calcium Hydroxide" offers a comprehensive and thoroughly revised overview of the versatile application of calcium hydroxide in dentistry. It is aimed at both dentists and dental students and addresses the fundamental role of this material in various dental procedures. Calcium hydroxide is known for its ability to maintain the vitality of teeth, particularly in direct and indirect pulp capping as well as in pulpotomy. Additionally, it creates an antimicrobial environment in endodontics, making it an indispensable component in dental practice. The different formulations of calcium hydroxide allow for effective application in both restorative dentistry and endodontics, earning this material a reputation as a wonder drug in dentistry.