Restorative and Laboratory Materials (Dental Cements, Bases, Liners, and Bonding Agents) Flashcards
What are bases used for?
to protect the pulp when the cavity is deep
What are liners?
low-strength materials that are placed under the restoration
What is the acidity of the oral cavity?
neutral, 7
What is tress defined as?
the force per unit area of a material
When enough stress is put on an object it causes change. What is this known as?
strain
What is tensile stress?
pulls and stretches
ability to withstand is ductility
What is the ability of a material to withstand the forces of tensile stress?
ductility
What is compressive stress?
pushes or compresses
ability to withstand is malleability
What is the ability of a material to withstand the forces of compressive stress?
malleability
What is shearing stress?
slides one part of a material to another part in a back-and-forth motion
When metals become dull and discolored is known as the effect of?
tarnish
What is a “flow”?
a continuing deformation of a solid
What is galvanism?
when two different metals are present in the mouth, creating a potential for the creation of small electrical shocks
When saliva and debris from the oral cavity seep between the tooth and restoration it is known as?
microleakage
What is mechanical retention?
preparing the walls of the prep to slant in, roughening the surface, or placing grooves
What is chemical retention?
a chemical reaction between the tooth surface and material
What is a bonding agent used for?
to bond the dentin and enamel with restorative materials
What are type I materials?
cements or luting agents
What are Type II materials?
amalgam, composite, and glass ionomer
intermediate restorative materials
What are Type III materials?
liners, bases, and bonding agents
What are the common forms off dental cements?
powder/liquid form
two-paste system
capsule
dispensing syringe
What does a dual-cured material combine?
self-curing with light-curing
What is luting?
bonding or cementing together
What is an intermediate luting cement?
a material that lasts 6-12 months
What is a sedative/palliative effect?
a soothing effect that a material ma have on a tooth
What is a varnish
a thin layer of material that is placed to seal the wall and floor of a cavity prep
What is an old, reliable cement? What type of material?
Zinc Phosphate
Type II, III
What is polycarboxylate cement also known as?
zinc polycarboxylate
What is polycarboxylate cement used for and why?
permanent cementation and insulating base
it is kind to the pulp
What are the 3 different types of glass ionomer cement?
Type I: fine-grain used for the cementation of crowns and bridges because it chemically bonds
Type II: coarser-grain used in Class III and V restos and pediatric
Type III: a liner and bonding agent
What is an electronic, noninvasive, diagnostic tool for detecting caries?
DIAGNOdent caries detection
