DHE132 Chapter3

Strong bonds with elecronic attraction; ionic bonds, covalent bonds, metallic bonds

Weaker bonds than primary bonds; hydrogen bonds, van der Waals forces, London Dispersion Forces

The hardness, and likelihood of breaking or cracking, of a material

The measure of the weight of a material compared with its volume

The resistance of a solid to penetration

the maximum amount of stress a material can withstand without breaking

The ability of a material to recover its shape completely after deformation from an applied force

A materials resistance to deformation

The greatest stress a structure can withstand without permanent deformation

The ability of a material to absorb energy without permanent deformation

The ability of a material to resist fracture

The ability of an object to be pulled or stretched under tension without rupture

The ability to be compressed and formed into a thin sheet without rupture

The strength of a material at fine margins

The ability of a material to withstand damage due to pressure or wear

The ability of a liquid material to resist flow

Liquids that flow more readily under mechanical force

Restorations placed directly into a cavity preparation

Materials used to fabricate restorations outside the mouth that are subsequently placed into the mouth

Restorations that are expected to be long-lasting

Restorations expected to last several weeks to months

The amount of time allotted to bring the components of a material together into a homogeneous mix

The time permitted to place and manipulate the material in the mouth

The time at which the material can no longer be manipulated in the mouth

The time at which the material has reached its ultimate state

Materials that set through a timed chemical reaction with the combination of a catalyst and base

Materials that require a blue light source to initiate reaction

Materials that polymerize when the materials is initiated by exposure to a blue light source and then continue with a chemical set reaction

The useful life of a material before it deteriorates or changes in quality