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DH 130 Dental Materials (I)

Name:____________________________________
Across
Organization that deals with publishing standards
Beta-hemihydrate
Porcelain ceramics used for crowns have this type of bond
Process of heating gypsum to drive off water
Maximum stress without being deformed permanently
A retarder
Impression material with low dimensional change
Will condense into a liquid
Permits macro-mechanical bonding of a crown
Poor wetting that has a contact angle greater than 90 degrees
Does not melt at the same temperature as it gels
Type IV, Die Stone or Densite
This is the by-product of Silicone (condensation type) that can result in distortion
Modulus of Elasticity is associated with this
Down
The amount of deformation
Alpha-hemihydrate
Used to make wax patterns for crowns by the lab
Molecules are distributed at random
Secondary bond
Polymer that mixes with water to form the sol
Has the highest coefficient of thermal expansion
Opening and closing of the margins of a restoration due to changes in temperature
Monophase impression material
Impression material with poor tear strength
Length of time from the start of mix until it is semi-hard
Negative copy
Carbon-Carbon double bonds of polymers are
An increase in atomic number results in this
Mercaptan is its functional group
Twisting type of stress
When gypsum material absorbs water from the air
Must not allow alginate impression to soak in water or disinfectant to prevent this from happening
Inelastic final edentulous impression material
For a given ______, the smaller the area over which it is applied the larger the value of stress.