1113 Test 3 Flashcards
What are the methods of setting
Auto cure, light cure, dual cure
When is amalgam used
When the patient can’t afford, can’t sit still or has lots of moisture
What classes of cavity is amalgam used for
1 or 2 (not on the front of incisors for esthetics)
What is galvanic action
When water and salt conduct a shock between 2 metals
Describe glass ionomer
Releases fluoride, adheres to metal and teeth, used for class 5 restorations
Describe the smear layer
Removed by etching for 20 seconds, layer by pulp, leave moist
Describe intermediate restorations
Temporary, used for caries management, used on primary teeth
What are the types of pulpal stimuli
Chemical (acid), biological (bacteria),
What does calcium hydroxide do
Repairs dentin
How much does the anatomic portion of an impression make
2 thirds
How much of the impression does the base make
1 third
How is the upper arch model trimmed
With points
How is the lower arch model trimmed
Rounded
How many scoops of powder is used for the upper impression
3 scoops
How many scoops of powder is used for the lower impression
2 scoops
When making plaster which goes first water or powder
Water
What is synerisis
When impression materials dry out
What is imbibition
When impression materials are too moist or have too much water
Describe the metals that make up amalgam
Silver (strength), tin (workability and strength), copper (strength and corrosion resistance), zinc (suppresses oxidation)
What is ductility
The ability to be flexible
What is malleability
The ability to be manipulated or molded
What is viscosity
How fast a liquid flows
Define solubility
The ability of something to dissolve
Describe the procedure for shallow amalgam
desensitizer, etching and bonding.
Describe moderate amalgam restorations
Base, varnish or desensitizer, etching/ bonding
Describe deep amalgam restoration procedures
Liner, base, varnish or desensitizer, etching/bonding
What is the most common bleaching agent for tooth whitening
Carbamide peroxide
Describe zinc oxide
Anti-bacterial, affordable, used in zinc oxide eugenol (ZOE), anti-inflammatory, used for temporary restorations
describe varnish
coating of fluoride applied to teeth to prevent decay, used on children and adults with high risk of caries, made of fluoride and resin
what is the final impression made of
elastomeric material
what is wax used for
measuring patients bite (registration), for making models of temporary restorations (bridges)
what are advantages of alganate
inexpensive, quick-setting
describe polyether
A rubber-based material, known for its stiffness
which is more practical Addition Silicone or condensation silicone
addition silicone
describe Zinc Oxide-Eugenol (ZOE)
used for final impressions in complete denture cases, Captures fine detail and provides excellent stability but can be irritating to some patients due to the eugenol component
describe impression compound (thermoplastic)
A wax-like material that softens with heat, Primarily used for border molding or making impressions for dentures, Allows for adjustments by reheating
why do you take a lower impression first
because patients choke more on the upper arch
what are the setting times of alganate
fast setting - 1-2 minutes, regular setting - 3+ minutes
What are the types of bases
Protective, insulative, sedative
Which materials are used for bases
Zoe, zinc phosphate cement, polycarboxylate, glass ionomer
What are the types of elastomeric material
Polysolfide (strong odor), polyether (solid stability and okay odor), condensation silicone (okay odor and stability), addition silicone (okay odor and excellent stability)
Describe the face bow
Measures the relation between the maxillary arch and the tmj joint
Describe the face bow procedure
Attach tray, rod and bite tabs, make the patient bite slowly and level, document
Where should an impression go
2-3 mm behind tuberosity
How would an impression be critiqued
Detail, margins, proper flow, tray fit, distortion free
How does glass ionomer adhere
Chemically
What type of wax is used to extend
Utility wax
What is pulimerization
Hardening
What are temporary restoration made of
Acrylic resins
What are intermediate materials used for
Restorative emergencies, caries management, Bases
What are intermediate materials used for
Restorative emergencies, caries management, Bases
What is hardness
How much a material will be dented
Should dental materials be high or low solubility
Low
What is an indirect restoration
Final (made in lab)
What type of restoration material is zoe
Intermediate
What is a pestal
A ball that mixes
