Impression Materials
a negative replica
What is an Impression?
material use to prevent disease or trauma or for their therapeutic action on the teeth or oral tissues
What is Preventive/Therapeutic materials?
rate of heat flow through a material
What is Thermal Conductivity?
weight or load: push or pull
What is Force?
Acid used in etching
What is 37% Phosphoric Acid?
Scale used to rank hardness in dental materials
What is the Moh's scale?
Dental material shown to release fluoride.
What is Glass Ionomer
8 hours and 24 hours
What is time frame for when a a patient should avoid chewing on a newly placed amalgam and full setting time?
water-base colloid that is hydrophyllic
What is a Hydrocolloid?
If the in interface is not sealed, fluids and microorganisms can penetrate between the tooth surface and the restorative material
What is Microleakage?
internal reaction to an externally applied force
What is Stress?
replaces lost oral tissues
What are Restorative Materials?
In dentin bonding, the attraction of dissimilar molecules is referred to as
removes excess material to develop the surface morphology and functional form
What is Finishing?
Low viscosity resin
What is dental sealant?
Mechanical device that mixes the dental amalgam alloy and mercury
What is a Triturator?
distortion caused by absorption of water when soaked or prolonged immersion in water
What is Imbibition?
materials used to fabricate and maintain restorations.
What are Auxiliary Materials?
causes tissue death attributed to material concentration
What is Toxicity?
Approach to oral healthcare that requires judicious integration of systematic assessments of clinically relevant scientific evidence, relating to patient’s oral medical history with the dentist’s clinical expertise and patient treatment needs and preferences.
What is Evidence Based Dentistry?
A bonding system that does not use separate etching procedure with 37% phosphoric acid. The acid is contained in the resin primer and no rinsing is required.
What is self-etch (6th Generation)?
the ability of a material to resist abrasion
What is Hardness?
Fluoride releasing glass ionomer with good esthetics, increased wear resistance, improved polishability
What are Nano-Ionomer?
When silver-based alloy particles are mixed with mercury
What is Amalgamation?
a hydrophobic, rubber impression material
discoloration as the result of oxidation of metal surfaces
What is Tarnish?
Materials that do not return to their original shape have exceeded their
What is Elastic Limit?
Dihydrate of calcium sulfate that is mined in a solid mass. Heated and grounded to a powder for
What is Gypsum?
Results in post-operative sensitivity, weaker bond and dissolving of collagen fibrils
What is over-etching?
Abrasive used for air polishing and a cleaning agent in toothpaste
What is Sodium Bicarbonate?
Glass Ionomer more resistant to wear and more polishable than the conventional type
What is Hybrid Glass Ionomer?
Amalgam that is dry, crumbly and sets too quickly
What is undertriturated?
Conversion of low molecular weight compound(monomer) to high molecular weight compound ( polymer)
What is Polymerization?
When we chew during mastication, many types of stress are involved and form complex stress combinations. One such combination, tension and compression
What is Flexural Stress?
The ability of a material to withstand damage due to pressure or wear.
What is Durability?
fundamental color of an object
What is Hue?
interferes with the formation of good bonding to the dentin and needs to be removed.
What is the smear layer?
the size of the abrasive particles, typically classified as coarse, medium, fine, and superfine
What is Grit?
glass ionomer used in combination with another restorative material to gain the best properties of each material. It can be used on the gingival margin of deep proximal caries involving the CEJ or root surface.
What is Sandwich technique?
Metal used to control the rate of set of amalgam
What is Tin?
Gypsum product ideal for making full or partial dentures and casts requiring higher strength
What is Dental Stone (Type III)?
force is applied when two surfaces slide against each other in opposite directions
What is Shearing?
The safe interaction of dental materials with the rest of the body
What is Biocompatibility?
the maximum amount of stress a material can withstand without breaking
What is ultimate strength?
intensity or strength of the color
What is Chroma?
Primary teeth should be etched longer than the permanent because:
What is the enamel prism pattern is more irregular?
the process of polishing the anatomical crown and clinical root surface using fine, soft particles under air pressure to remove biofilm subgingivally
What is Subgingival air polishing?
a technique that allows trained and untrained dental personnel to help stop the progress of decay without the use of dental drills and equipment
What is Atraumatic Restorative Treatment?
What is the weakest of the setting phases of amalgam?
reaction when a gypsum model is setting, the material gives off heat
What is Exothermic?
excessive expansion of a restorative material could have this result on a tooth
What is Fracture of cusps?
Ability of a material to withstand compressive forces
What is Malleability?
term is used to describe metals that withstand dimensional change without breaking
What is ductile or ductility?
document/s providing instructions in case of spill
What are SDS's?
explains that post operative sensitivity or pain is caused by the movement of pulpal fluid in unsealed dentinal tubules. Change in pressure within the tubules stimulates response from the nerve fibers in the odontoblastic process that extends into the tubules from the pulp.
What is Hydrodynamic Theory of Tooth Sensitivity?
The process of removing restoration overhang and flashing to bring the restoration flush with the cavo surface margin
What is Margination?
Glass Ionomer that has added silver particles to improve their wear resistance and strength
What is Cermets?
a phenomenon associated with the gamma-two phase seen with high-copper amalgam alloys
What is Creep?