Chapter 3: Vocabulary Flashcards
ionic bonds, covalent bonds, metallic bonds
Primary Bonds
hydrogen bonds, Van der Vaals bonds
Secondary Bonds
hard and likely to break or crack
Brittleness
the measure of the weight of a material compared with its volume
Density
the resistance of a solid to penetration
Hardness
the maximum amount of stress a material can withstand without breaking
Ultimate Strength
the ability of a material to recovers its shape completely after deformation from an applied force
Elasticity
a material’s resistance to deformation
Stiffness
the greatest stress a structure can withstand without permanent deformation
Proportional Limit
the resistance of a material to permanent deformation
Resilience
the ability of a material to resist fracture
Toughness
the ability of an object to be pulled or stretched under tension without rupture
Ductility
the ability to be compressed and formed into a thin sheet without rupture
Malleability
the strength of a material at fine margins
Edge Strength
the ability of a liquid material to flow
Viscosity
property of a liquid to flow more readily under mechanical force
Thixotropic
restorations placed directly into a cavity preparation
Direct Restorative Material
materials used to fabricate restorations outside the mouth that are subsequently placed into the mouth
Indirect Restorative Material
the amount of time allotted to bring the components of a material together into a homogenous mix
Mixing Time
the time permitted to manipulate the material in the mouth
Working Time
the time at which the material can no longer be manipulated in the mouth
Initial Set Time
the time at which the material has reached its ultimate state
Final Set Time
materials that set through a timed chemical reaction with the combination of a catalyst and base
Chemical Set Materials
materials that require a blue light source to initiate a reaction
Light-Activated Materials
materials that polymerize by a chemical reaction when the material is mixed with a catalyst or initiated by exposure to a blue light, or by a combination of chemical or light reaction
Dual Set Materials
the useful life of a material before it deteriorates or changes in quality
Shelf Life
