In these two years, dental informatics has applied many technological advances and discoveries to become a medical research discipline of significant scale and scope. The purpose of writing this book is to update our knowledge and gain experience in dentistry sciences. The book covers various topics in dental science, technology, health issues, etc. The dental profession is responsible for preventing, diagnosing, and treating diseases and disorders of the oral cavity and related structures. Advances in dental technology have led to dramatic improvements in the ability of practitioners to restore tooth structure, replace lost teeth, and change the appearance of intrinsically or extrinsically discoloured teeth.