Dental Materials 164
unit 1 PIMA
|Corrosion ||The roughness and pitting of a metal alloy due to chemical attack, contamination,etc |
|Wetting ||The ability of the liquid to flow easily over the surface and to come into contact with all small roughnesses present.|
|Ductility ||The ability of a material to withstand permanent deformation under a tensile load without rupture.|
|Malleability ||The ability of a material to withstand permanent deformation under compressive load without rupture.|
|Linear Coefficient of Thermal Expansion ||The increase in length of a material, per unit length, when the temperature is increased 1° Centigrade.|
|Adhesion ||The force which causes attraction between unlike molecules. |
|Exothermic ||A chemical reaction that gives off (releases) heat.|
|Soluble ||Able to dissolve influence.|
|Microleakage ||When fluids, microorganisms, and debris from the mouth penetrate the outer margin of the restoration and progress down the walls of the cavity preparation.|
|Mechanical Retention ||How a material is held in place by means such as the shape of the cavity preparation, etching the surface, or placing retentive grooves.|
|Brittleness ||The property of being easy to break or rupture.|
|Force ||Any push or pull on matter.|
|Galvanism ||Small currents created whenever two metals are present in the oral cavity.|
|Hardness ||The resistance of a material to indentation or penetration.|
|Physical condition of the oral cavity which need consideration when a restoration is being placed include: ||The acidity (pH) in the mouth, which may cause metallic restorations to tarnish or corrode and nonmetallic restorations to deteriorate.
Biting forces during mastication.
|TRUE ||A liquid that does not flow easily and is the consistency of a thick or heavy syrup.
A high viscous adhesive will not flow easily and will not be as effective in wetting a surface as would an adhesive of lower viscosity.|
|The color blue on the chemical warning lable indicates... ||Health hazard|
|TorF? The National Fire Protection Association's color and number method is used on chemical warning labels. ||True|
|TorF? The higher is number the greater the danger (for red, blue, and yellow) ||True|
|TorF? The color red identifies the fire hazard ||True|
|TorF? Letters are used to identify the PPE needed ||True|
|TorF? The color white identifies the PPE needed ||True|
|Which federal agency is concerned with the health and safty of employees? ||OSHA|
|What is MSDS? ||Data that contains safe handling, disposal, and precautions of materials.|
|The ________ regulates the disposal of hazardous waste... ||EPA|
|TorF? When a hazardous chemical is placed in a separate container for use on another day, it must be labeled with a copy of the original label or a new label... ||True|
|Inspections of dental facilities relating to workers safety are conducted by... ||OSHA|
|A dentist must provide training for employees..
4 answers ||Within 30 days of employment.
Whenever a new hazardous material is introduced into the workplace.
Whenever procedures for safe handling and emergencies are modified.
Once per year.|
|Safety glasses, gloves, and face masks are examples of... ||PPE|