Introduction to Dental Materials Mohammad AL-Rabab’ah Assistant Professor-Department of Conservative Dentistry BDS, Statutory exam (UK), MFD RCS Ire, MRD RCS Ed, PhD. (Fixed and Removable Prosthodontics) • malrababah@ju.edu.jo AIM • To give a brief introduction about the science of dental materials (DM) Objectives • To give a simplified definition of science of DMs. • To give a brief history of DMs development. • To convince you of the importance of DMs science. • To introduce major categories and clinical applications Definition • An interdisciplinary area that applies biology, chemistry, and physics to the development, understanding, and evaluation of materials used in the practice of dentistry; principally involved in restorative dentistry, prosthodontics, pedodontics, and orthodontics. Physics DENTAL MATERIALS SCIENCE Chemistry Biology age • Middle الزهراوي الرازي History of DM Early history: • Gold structure of the Phoenicians. Phoenician Dental Art by Don Clawson. Berytus Archaeological Studies http://www.cartage.org.lb/en/themes/geoghist/histories/oldcivilization/phoenicia/ denistry/dentstry.html • Hippocrates used gold wire ligature. • Filling of carious teeth involved use of Lint, Lead • Cadaver or animal teeth used for replacement! Renaissance and enlightenment age: • Lost wax technique by Benvenuto Cellini 1558 Fonzi: Porcelain teeth • Taveau: first to prepare amalgam (Silver paste). • The American Journal of Dental Sciences 1839. Why we need to study DM? • Hyena OR Crocuta Crocuta With its teeth Hyena can crush the prey bone and chew them up into abite-sized pieces.!!! • But what about human teeth - Oral environment * Temperature * Saliva and fluids * Micro-organisms * Occlusal forces Why we need to study DM Why we need to replace missing tooth structure/ teeth • Appearance • Function • Any other reasons? • So why we need to study DM?!