This Book is about Computer aided design and computer aided machines using in dentistry ,,and thier role in curent genaration,digital dentistry has emerged in recent days how important it is and how accurate it is all these things included in this book,starting from diagnosis and how it will useful in crown and bridges making and what is the difference between manual crowns which are generally made in dental labs and how far it is different from CAD - CAM manufactured crowns every things included in this book