Academy of Dental Knowledge

You must know the properties of the materials used in dentistry to understand its function and how and why it works in oral cavity. It also helps in manipulating it. The main properties you should know about are following: Stress Strain Elasticity Modulus Elastic Limit Thermal Expansion Hygroscopic Expansion Setting Expansion To read the entire lecture (in premium Iridium course), click at the link HERE . Annealing: Annealing is a process of heating and cooling of metal in a controlled manner. It is done/designed to produce desired properties in a metal. it is typically done to make the metal softer, increase ductility, stabilise the shape and improve/increase the machinability. When we talk about annealing of gold foil, it typically is done to remove surface contaminants just before the condensation.

Anatomy of the tooth and surrounding tissues E namel:  This is the hard, calcified substance that makes the surface of a crown of a tooth. Dentin:   This is the calcified tissue that forms the major part of a tooth. In the  crown of the tooth, the dentine is covered by enamel. The pulp chamber of the tooth is surrounded by dentine. Pulp:  This is the organ at the centre of a tooth that contains blood vessels, connective and neural tissue, and cells that produce dentine-odontoblast. Blood vessels and neural tissue enter the tooth from the apex of the root. Gingiva:   This is the marginal part of the gum that surrounds the tooth where it  emerges from the deeper, supporting tissues. Periodontal ligament:  This is t he ligament that connects a tooth, by its root, to the supporting bone. Cementum:  This is the calcified tissue on the surface of the root of a tooth, which provides attachment for the periodontal ligament. Fissure:  I...