DEN 102 EXAM 2

What is the normal mixing time for zinc oxide-eugenol (ZOE)?

30 to 60 seconds

Instruments are set up on the dental procedure tray:

From left to right

The hand cutting instrument used to cut enamel and bevel the gingival margins of a cavity preparation is a(n)"

Gingival margin trimmer

Syneresis

Loss of water, causing something to shrink

Hydrocolloid is

Material used to obtain preliminary and final impressions which may be reversible or irreversible

The basic setup is composed of a(n):

Mouth mirror, double-ended explorer, and cotton pliers

Dental hand instruments:

Must be able to withstand sterilization procedures

Why are premeasured capsules commonly used with cements?

They are convenient

Which function of the mouth mirror helps guard the tongue or cheek against accidental injury caused by a dental bur?

Tissue protection

Hand instruments are designed with three specific parts:the handle, the shank, and the:

Working End

How is zinc phosphate dispensed?

a powder/liquid

What is the shelf life of alginate?

approximately 1 year

Amalgam is condensed to:

compact the material tightly and remove excess mercury

Crushing pressure that pushes a material together is applied by:

compressive stress

A Woodson (FP-1) is a:

double ended instrument with a nib on one end and a paddle on the other end.

Immediately after trituration, amalgam is:

soft and easily shaped

What term describes having a sense of touch or feeling?

tactile

The types of instruments that allow the operator to inspect the health status of the oral cavity thoroughly are _________ instruments.

examination

What is the term used to describe the releasing of heat from a chemical reaction?

exothermic

The small shock that is created when two dissimilar metals touch in the mouth is known as:

galvanic action

Which of the following dental restorative materials possesses the unique quality of fluoride release?

glass ionomer

The three specific parts if hand instruments are the:

handle, shank, and the working end

What piece of equipment is used to polish dentures?

lathe

When working with light cured composite, the darker the shade of the material, the _______ the curing time will be.

longer

What is a favorable property of a dental material?

low solubility

dental amalgam is composed of an alloy powder (made of silver, tin, copper, and zinc) that is triturated to be mixed in approximately equal parts with which of the following?

mercury

Which type of gypsum is commonly referred to as plaster of Paris?

model plaster

During the pouring procedure, where should the gypsum material be placed to flow to all areas of the impression?

most posterior tooth

The two basic setup that can be transferred simultaneously using the two-handed transfer are the:

mouth mirror and explorer

Where is zinc phosphate cement mixed?

on a cool glass slab

Uses of a mouth mirror include:

retraction and tissue protection

The part of the instrument that attached the working end to the handle is the:

shank

Porcelain is chosen as an indirect restorative material for which of the following reasons?

the esthetic colors for tooth matching

The working end of an explorer is best described as:

thin and wirelike

alginate (irreversible hydrocolloid)

this is the most widely used for preliminary impressions.

Double-ended hand instruments are characterized by having two working ends and:

two shanks

A flexible mixing spatula (#15, 24 is

used to mix liners, bases, and cements

Which dental material seals dentinal tubules, reduces leakage around restoration, and acts as a barrier against highly acidic cements?

varnish

Imbibition

Absorption of water, causing an object to swell

A plugger is also known as a(n):

Amalgam condenser

The instrument that transports freshly triturated amalgam from an amalgam well to a cavity preparation is the amalgam:

Carrier

Accessory instruments can include:

Cements and impression spatulas

A Wedelstaedt is an example of which of the following types of hand (Manual) cutting instruments?

Chisel

A restorative instrument made from anodized aluminum or Telfon is a(n):

Composite placement instrument

The hand cutting instruments used to manually remove decayed tooth structure is the:

Excavator

The instruments placed on the tray setup after the examination instruments are classified as:

Hand cutting

The instrument used to measure the sulcus, or pocket depth, of the periodontium of each tooth is the:

Periodontal probe

What are the four types of elastomeric impression materials most often used in dental practice?

Polysulfide, polyether, silicone, and polysiloxane

Which of the following is the best way to organize hand instruments and be prepared for a procedure?

Preset cassettes

Which number represents the length of the blade according to GV Black's instrument formula?

Second

In a tray setup, the instruments placed the farthest to the left are _________instruments.

The basic set up

What type of inlay wax is used for indirect wax patterns on dies?

Type B

Which type of dental base contains eugenol, which provides a sedative effect on irritated pulp?

ZOE

What type of cement is used for veneers?

a composite resin

What is IRM the restorative material of choice for?

a short term restoration

What makes composite resin a more favorable restoration than an amalgam?

a smaller cavity preparation due to bonding

At which stage in cavity preparation and restoration should a dental varnish be applied?

after the application of the liner

A preset sterile tray should be taken to the treatment area:

before seating the patient

What type of wax is used to form a wall around a preliminary impression?

boxing wax

Types of instruments that include the ball, football, T ball and beavertail are:

burnishers

Water to powder ratio mandibular

2 scoops to 2 measures of water

In addition to a shade guide, a curing light, and a composite instrument, what else may be used during the preparation of a composite resin restoration?

2x2 inch alcohol gauze pads

Water to powder ratio maxillary

3 scoops to 3 measures of water

When mixing zinc phosphate, what is the ideal temperature of the glass slab?

68 degree

Which supplementary dental material may be placed to provide a protective, insulating, and sedative effect in a moderately deep cavity preparation before amalgam placement?

dental base

Which type of stone is used as a working model for making dentures?

dental stone

Which can be used to check a patient's bite on a new restoration?

Articulating paper

What is the organic matrix of composite resins?

BIS-GMA

The type of scissors most often associated with restoration dental procedure are ______ scissors

Crown and bridge

Instruments used to place, condense, and carve the dental materials back to the normal anatomy of the tooth are classified as:

Restorative

Which type of gold alloy is used for cast removable partial dentures because of their hardness, malleability, and adaptability

Type IV

Wetting, viscosity, surface characteristics, and film thickness are all characteristics,that affect which of the following application properties?

adhesion

Stimulating the production of reparative or secondary dentin, protecting the pulp from chemical irritation, and compatibility with numerous types of restorative material are all characteristics of which dental liner?

calcium hydroxide

What is type I glass ionomer cement used for?

cementation of metal restorations and direct-bonded orthodontic brackets

Dentin sealer is also referred to as which of the following?

desensitizer

The type of carver that is especially useful for carving of the occlusal surfaces is the:

discoid cleoid carver

The gold alloy used for cast removable partial dentures is:

extra hard, type IV

The most common noble metals used for crowns and bridges are:

gold, palladium, and platinum

The amalgam capsule is reassembled immediately after use to:

minimize mercury escaping into the air

Zinc oxide-eugenol is mixed on which of the following?

oil-resistant pad

Thermal changes from hot and cold or electrical energy created by other metals coming into contact with the tooth are defined as which type of pupal stimuli?

physical

The most common type of ceramic used in dentstry is:

porcelain

What are temporary cements primarily used for?

provisional temporaries

Before dentin bonding, what function does acid etching have?

removal of the smear layer

Which type of wax is used to cover orthodontic brackets?

utility wax

What is the recommended water/powder ratio for high-strength stone?

100 g powder/19-24 mL water

Before restoring a tooth with composite resin, how long is the tooth etched?

15 to 30 seconds

Hysteresis

A change in temperature that causes the reversible hydrocolloid material to transform from one physical state to another.

One of the most convenient and efficient ways to organize instruments are supplies for a specific procedure is the use of:

A color coding system

Polysulfide

(rubber base) final impression material with long setting time, strong odor and can easily stain clothing. It's supplied as a two-paste system: the base and the catalyst.

The instruments most often referred to by number rather than by name are:

Pliers and forceps

What piece of equipment is used to remove air from the mix of gypsum products?

vibrator

What is the term used to describe something that evaporates easily and is very explosive?

volatile

What ingredient has a soothing effect on the pulp?

eugenol