3th mid practice quiz. ch #44, and 45
Desensitizer should be placed:
after rinsing and lightly drying.
A delay between the final mix and the actual seating of the restoration could result in _____ and the possibility of the casting not fitting completely.
an initial setting process
Lymphocytes fight disease by producing:
antibodies.
Trabeculae:
are very dense and hard.
.Zinc phosphate cement is used:
as a luting agent for permanent restorations
A desensitizer could be indicated for which of the following procedures?
Amalgam
How is the amalgam triturated?
Amalgam is triturated in an amalgamator.
What temporary restorative material would be selected for a class II cavity preparation?
An IRM would be selected for a class II cavity preparation.
Before handing the loaded crown to the dentist, the dental assistant lines the interior of the crown with the cement, preferably with a plastic instrument.
False
Zinc phosphate cement is mixed rapidly on a waxed paper pad to prevent heat from causing it to set prematurely.
False
What are the four properties that must be considered in the application of a dental material?
Four properties that must be considered in applying dental materials are flow, adhesion, reten-tion, and curing.
Which of the following is a permanent cement that releases fluoride to the underlying tooth structure?
Glass ionomer cement
What are some of the most common uses of glass ionomer materials?
Glass ionomer materials are commonly used as restorative materials, liners, bonding agents, and permanent cements.
What is the term given to the removal of decayed and weakened tooth structure using rotary and hand instruments?
Preparation
What are the three noble metals used in dentistry?
The three noble metals used in dentistry are gold, palladium, and platinum.
Which is not true in the application of etchant material?
The tooth must be thoroughly dried.
After treating the dentin with etchant, most of the minerals are removed from the outermost layer and only tissue fibers remain.
True
Care must be taken to prevent overdrying of the dentin after etching or a hybrid layer will not form.
True
The term lute refers to the ability of a cement to convert from a liquid to a solid after mixing.
True
difference between zinc phosphate and ZOE cement
zinc phosphate can both be a permanent cementation or base, is strong and irritates the pulp. ZOE cement is a temporary. Zoe can be used as a base of temporary filling, kind to pulp, and is weak.
The cement that gives off an exothermic reaction and must be spatulated over a wide area of a cool, dry, thick glass slab is:
zinc phosphate.
What happens to a dental material when exposed to hot and cold?
A dental material undergoes contraction and expansion when exposed to hot or cold..
What is true of the bonding process?
Avoid overdrying or desiccating the tooth; the product works best on a slightly moist tooth structure.
Which of the following is an example of biological pulpal stimuli?
Bacteria from saliva coming into contact with pulpal tissues
What are the four organizational levels of the human body, from simplest to most complex?
Cells,Tissues,Organs,Body systems.
The nucleus of the cell contains the:
DNA.
Which of the following will not minimize the loss of water from evaporation when working with dental cements?
Dispensing the liquid first and then powder
Which is not true of the preparing the tooth for a composite resin cementation?
Dry the tooth completely.
The lining of the mouth is made of _____ tissue.
Epithelial tissue
Which is not a use of fluoride varnish?
Luting agent
Thermal changes from hot, cold, or electrical energy created by other metals coming into contact with the tooth are defined as which type of pulpal stimuli?
Physical
Which is not an advantage of using glass ionomer in premeasured capsules?
Results can vary.
Which type of muscle do we have conscious control over at any given time?
Striated
What professional organization evaluates a new dental material?
The American Dental Association (ADA) evaluates a new dental material.
What metals make up the alloy powder in amalgam?
The alloy powder in amalgam contains silver, tin, copper, and zinc.
What is the common term used for dimethacrylate?
The common term for dimethacrylate is BIS-GMA
Which of the following statements is true?
The eyes are lateral to the nose.
Which of the following luting cements is used primarily for temporary cementation?
Zinc oxide eugenol cement
Which of the following cements is mixed only on a cool glass slab?
Zinc phosphate
Which of the following materials used as a base needs to set at least 5 minutes before placing the restoration?
Zinc phosphate cement
Which of the following cements uses a viscous liquid composed of weak acids that bond to the calcium of tooth structure?
Zinc polycarboxylate cement
The smear layer is composed of
a very thin layer of debris remaining on the dentin after cavity preparation.
The smear layer is composed of:
a very thin layer of debris remaining on the dentin after cavity preparation.
.Glass ionomer capsules are mixed:
by mechanical trituration.
After mixing permanent cement, the spatula and glass slab should be:
cleaned immediately with a wet gauze sponge and disinfected.
.When you are preparing a crown for temporary cementation, you should:
completely fill the crown with cement
.Zinc phosphate cement is used:
completely fill the crown with cement.
The term exothermic means to:
give off heat.
The cement that bonds directly with enamel, dentin, and metallic materials is:
glass ionomer.
When ready for use, properly mixed polycarboxylate cement should appear:
glossy.
A dental liner is placed:
in the deepest area of the tooth preparation.
When mixing zinc phosphate cement, a cool, dry slab will ________ the setting time.
increase
If excess cement is not removed from in and around the gingival margin and sulcus of the tooth, the cement can:
irritate the area and cause inflammation and discomfort.
Polycarboxylate cement:
is less irritating to the pulp than zinc phosphate cement.
.A (n) __________ agent holds two things together.
luting
A _____ is classified as a type I dental cement and acts as an adhesive to hold together the indirect restoration and the tooth structure.
luting cement
The term for "chewing" is:
mastication.
The part of the respiratory system that is visible through the mouth is the:
oropharynx.
The connective tissue that protects and supports other body organs is ______ tissue.
osseous tissue
The cells associated with bone formation are known as:
osteoblasts
Acid etching utilizes etchant containing _____ acid.
phosphoric
Etching for dental bonding is done with
phosphoric acid.
When removing cement from a casting, never:
pull excess cement down away from the casting.
Insulating base material should cover the entire _______ to a thickness of _____ mm.
pulpal floor; 1-2
The function of the atria of the heart is to:
pump the blood.
The term that refers to a muscle returning to its original shape is:
relaxation.
Before cementing a porcelain crown, the internal surface of the crown is:
roughened with air abrasion.
Etchant removes the _____ layer in preparation for bonding.
smear
A jagged line where bones come together and that forms a joint that does not move is a(n):
suture muscle
The type of glass ionomer cement used for orthodontic cementation is type:
type I
The zinc phosphate cement designed for the accurate seating of precision castings is:
type I
Type _____ glass ionomer cement is designed for restoring areas of erosion near the gingiva.
type I
