Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
46 Cards in this Set
- Front
- Back
|
List the advantages of alginate.
|
hydrophobic
working and setting times convenient minimal equipment low cost easy to use |
|
|
_______ is shrinkage of impression that is exposed to air.
|
evaporation (dis. of alginate)
|
|
|
_________ is contraction and exuding of water after setting.
|
syneresis (dis. of alginate)
|
|
|
_________ is absorption of water causing swelling and distortion.
|
imbibition (dis.of alginate)
|
|
|
Pour alginate within ____ mins
|
30
|
|
|
Alginate is used for
diagnosis and treatment planning mouthguard bleaching tray retainers preliminary full dentures ortho cases |
study
|
|
|
disinfection of alginate material will cause _____ to occur
|
imbibiton
|
|
|
Polysulfites (elastomeric) is more accurate than alginate.
|
study
|
|
|
Addition Sillicone- Why are they best? What are they used for?
|
most accurate, stable, expensive
reproduction of fine detail popular for crown and bridges*** |
|
|
CAD stands for
|
Computer aided design/computer aided manufacture
|
|
|
working time is _______.
|
5-7mins
|
|
|
_____ is the length of time from the start of the mix until setting mass reaches a SEMIHARD stage.
|
working time
|
|
|
________ represents end of working time.
|
loss of gloss
|
|
|
final set is ______ mins
|
30-45
|
|
|
______ is the length of time from the start of the mix until the setting mass becomes rigid and can be separated from the impression. failure to penetrate with fingernail.
|
final set
|
|
|
_______ is the strength that is measured when the excess water is not present in the sample.
|
dry strength
|
|
|
What is the proper technique for pouring gypsum?
|
measure powder/water
add powder to water in 30-60sec.- stirring rapidly with wide stiff- bladed spatula vibrate to remove air bubbles |
|
|
How do you increase the setting time for gypsum?
|
(Slower-setting)
Decrease mixing Higher water/powder ratio Cool water Add retarder (borax) done by manu. (Can be purchased this way) |
|
|
How do you decrease the setting time for gypsum?
|
(Faster-Setting)
Increase Mixing Lower water/powder ratio Warm water Add accelerators (potassium sulfate) |
|
|
_______ is a used to protect pulp from chemical irritation and has
no thermal insulation |
liner
|
|
|
_________ is used to provide thermal insulation to the pulp and is thicker and stronger than Liner.
|
base
|
|
|
_______ is a agent use to hold appliances and restorations in place.
|
luting agent
|
|
|
Know that cements used for temporary restorations can be used for caries control.
|
study
|
|
|
What are the liquids used in dental cements?
|
Eugenol-obtundant
Poly-acrylic acid- Phosphoric acid- |
|
|
What are the powders used in dental cements?
|
Zinc Oxide
Powdered Glass |
|
|
What is in the powdered glass portion that is a common additive and what is the result?
|
Powdered Glass
ability to release FLUORIDE and inhibits caries |
|
|
______ is an organic liquid that is a weak acid that has a distinctive smell and taste, obtundant(reduces irritation) to the pulp and inhibits set of composites.
|
eugenol
|
|
|
What are the advantages of calcuim hydroxide?
|
mildly irritating to the pulp and is BACTERIOSTATIC; promotes SECONDARY DENTIN
|
|
|
What are advantages of composite cements and its uses?
|
advantages
-high strength -wide selection of shades and tints uses -luting ceramic restorations, veneers, ortho brackets -bonding agent -temporary restoration |
|
|
Glass Ionomer is a combination of Glass powder and ________
-used as lute for metal and cero-metal crowns -pre-measured single-dose capsules-release ________ -high strength -______ bonding to enamel and dentin |
Glass Ionomer is a combination of Glass powder and ________(polyacrylic acid)
-used as lute for metal and cero-metal crowns -pre-measured single-dose capsules-release ________(fluoride) -high strength -______ (chemical)bonding to enamel and dentin |
|
|
_______
-mixed on glass slab -oldest cement -used as luting cast restorations, orthobands, high strength base, temporary restoration, intermediate restoration |
zinc phosphate cement
|
|
|
_____ is a tooth that is no longer living
|
nonvital tooth
|
|
|
_____ is tooth with living pulp tissue.
|
vital tooth
|
|
|
A patient's perception regarding his or her appearance is critical in determining whether tooth whitening is sought and/ or accepted.
|
study
|
|
|
______ stain occurs within tooth structure (enamel and dentin) as result of post-eruptive stain (amalgam rest., endo trt) and pre-eruptive stain (tetracycline, fluorosis, dentinogenesis imperfecta)
|
intrinsic stain
|
|
|
_______ stain occurs on the surface of the tooth as a result of foods, drinks, coffee, tea, and tobacco.
|
extrinsic stain
|
|
|
Affects of tooth whitening on intrinsic stain
-Tetracycline-milder better success -Fluorosis-no pitting-milder better success -Dentinogenesis and amelgenesis-Whitening will not significantly improve appearance |
study
|
|
|
What are the two whitening agents used for vital teeth?
|
hydrogen peroxide
carbamide peroxide |
|
|
What is a whitening agent used for NON-VITAL teeth whitening?
|
sodium perborate
|
|
|
Result of tooth whitening are permanent. t/f
|
false, non-permanent
|
|
|
What are side effects of tooth bleaching?
|
1.) TOOTH SENSITIVITY
More of a problem for patients with previous sensitivity or root exposure Tx.- discontinue bleaching and use a neutral sodium fluoride 2.) GINGIVAL IRRITATION Results from poor fitting tray (Trim tray) or bleaching solution contacting gingiva. If using a custom tray may trim using the scalloped method OTC trays typically do not fit well |
|
|
What are possible long term effects of long term whitening?
|
Free radicals of the peroxide are linked to CANCER-caution abusive bleaching users esp. those that are at risk for oral cancer (tobacco and alcoholics users.
|
|
|
What are the 3 different types of mouth guards and what are the advantages and disadvantages?
|
stock mouthguard
-adv.available in different sizes -dis. not custom-made, nor preferred mouth-formed guard -adv. boil-and-bite style to produce an inexact fit -dis. can become distorted and does not accommodate an individual athlete's unique features custom-made mouthguard -adv, precise fit, comfortable, better reducing injuries -dis. when changes occur in dentition it will need to be replaced |
|
|
_______ is polymer that softens on heating and then hardened into the final shape upon cooling. It also used to produce oral appliances.
|
thermoplastic
|
|
|
What is proper maintenance for an oral appliance?
|
daily rinsing and brushing with a soft-bristled, wet toothbrush
professional cleaners for soaking STOCK APPLIANCES and "BOIL AND BITE"- should not be cleaned in hot water (distortion) |
|
|
Tay Tay
refer to pg. 224 (dental materials book) table 18.1 List of all oral appliances |
Good luck on finals :)
|
