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Where should the cervical margin of a matrix band lie?

1mm beyond the ginigival margin of the preparation

What is the correct order of steps for preparing the T-band matrix?

3, 4, 2,1

To contour a metal matrix band for posterior teeth, place the band on a paper pad and rub the inner surface of the band with ___ until the end begins to curl.

A burnisher or the end of a mirror handle

Once the AutoMatrix band is positioned on the tooth, how is the band tightened?

A wrench turns the coil clockwise to tighten the band

How should cement be placed into an indirect restoration for delivery?

Add a thin lining to cover all internal walls of the casting.

What is the internal surface of a cavity that runs parallel to the long axis of the tooth called?

Axial wall

What is the material of choice for restoring Class III and Class IV preparations?

Composite resin

Which cement inhibits recurrent decay?

Composite resin

Which direct restorative material may be selected for the permanent restoration of a Class II lesion?

Composite resin

What is the component of the universal matrix retainer that is always positioned in the mouth facing the gingiva called?

Diagonal slot

Which item listed would not use luting cement for placement?

Direct provisional restorations

When working with dental cements, which statement is incorrect regarding minimizing water loss through evaporation?

Dispense the liquid first then powder

Composite resin cement is used, how should the tooth surface be prepared

Etched or treated with a bonding system. Free of all plaque and debris

If a cusp is lost during preparation, which matrix band would provide the best support while restoring?

Extension

Which statement best represents the dental assistant's priority when preparing dental cements?

Follow the manufacturer's instructions.

Who performs the majority of the operative dental procedures?

General dentist

Where do Class V lesions occur?

Ginigval third

Properly mixed glass ionomer cement should have a(n) _______ apperance

Glossy

Which of the following is the instrument of choice when positioning a wooden wedge?

Howe pliers

Which type of glass ionomer cement is designed for cementation of indirect restorations?

I

Mylar strips are used for Class __ restorations.

III

What classification of restoration involves the proximal surface of a maxillary incisor and includes the incisal angle?

IV

Which type of glass ionomer cement is used for a pit and fissure sealants?

IV

Class restorations involve the interproximal surfaces of which teeth?

Incisors and canines

W hat would occur if there were a delay between mixing a luting material and placing the indirect restoration?

Initial set begins

Which statement is incorrect regarding brush-on whitening methods?

It is as effective as other tooth-whitening methods.

When compared to zinc phosphate cement, which statement regarding polycarboxylate cement is correct?

It is less irritating to the pulp

Where is the wedge positioned when placing a posterior restoration?

Lingual

When one or both of the proximal surfaces are removed during a preparation, how is the filling material retained while restoring?

Matrix system

Which of the following dental instruments is used to contour an anterior matrix band?

Mirror handle

Which technique will help to dissipate hear when mixing zinc phosphate cement?

Mixing on a cool glass lab

During a Class III or IV restoration, the dentist may use ___ to help reproduce the correct contours and contact

Mylar matrix system

If a patient is having a Class III restoration on the maxillary central incidor, which type of system would be used?

Mylar system

What is one advantage of an AutoMatrix over a universal matrix?

No retainer to hold the band in place

How should glass ionomer cement be mixed to increase the working time?

On a glass slav

How many tooth surfaces does a class I restoration involve?

One

Which of the following is the step in initial cavity preparation when the dentist decides on the design and initial depth of sound tooth structure?

Outline form

Which matrix system is used with posterior conposite restorations?

Palodent

What is the final step in a cavity preparation?

Placing a desensitizing or lining agent

In which teeth are Class II restorations found?

Premolars and molars

What is the dental assistant responsible for during a restorative procedurer

Preparing, mixing, and transferring dental materials

What responsibility does the dental assistant provide during a permanent restorative procedure?

Provide moisture control by using the high-velocity suction.

Which method would not be used to remove excess cement from an indirect restoration?

Pull excess cement down away from the casting.

Why should stainless steel matrix bands not be used with composite resin materials?

Resins can be scratched by stainless steel. Stainless steel can interfere with the setting of the resins.

Which factor is not an advantage of using glass ionomer in premeasured capsule?

Results can vary.

How should the interior of a porcelain crown be treated before cementation?

Roughened using air abrasion

What is the component of the universal matrix retainer that holds the matrix band securely in the device called?

Spindle

Which type of matrix system is used for the primary molars?

T-band

Which of the following statements is true?

The Class V lesion location will determine the type of restorative material selected.

Which statement is true regarding retention pins?

The retention pin has deep threads that grip the dentin when screwed into tooth structure

Which statement is incoIrect concerning placement of the matrix retainer and band?

The seated band extends 2 to 3 mm above the occlusal surface of the tooth.

Which statement is correct regarding posterior metal matrix bands?

The smaller circumference is placed toward the gingiva.

Which statement is correct concerning wedges?

The wedge presses the band against the tooth, causing a slight separation of the teeth. A wedge is used to apply pressure to the apical and gingival walls of the preparation.

What is the material of choice for a universal matrix band?

Thin, flexible stainless steel

What is the purpose of a veneer?

To close diastemata

What is the purpose of a matrix system?

To retain and support the restoration. To provide a temporary interproximal wall for the restorative material

Which matrix system used fro class II posterior restorations is the most common?

Tofflemire retainer and universal band

Which of the following procedures is an example of esthetic dentistry?

Tooth whitening

The universal, or Tofflemire, retainer holds the matrix band snugly in position. It is most often positioned in which area?

Toward the posterior of the mouth

If used as a base, zinc phosphate requires the use of a liner first

True

What type of cement is frequently used to cement ceramic inlays and onlays?

Type I zinc oxide-eugenol cement

Which statement is incorrect concerning veneers?

Veneers have an unlimited life span.

Whic procedure listed is included under the umbrella of esthetic dentistry?

Whitening techniques

The provisional restoration should be lined with which of the following types of cements when being placed for temporary coverage?

Zinc oxide-eugenol cement

Which cement that gives off an exothermic reaction and must be spatulated over a wide area on a cool, dry, thick glass slab?

Zinc phospahte

Which cement is the most acidic and irritating to the pulp?

Zinc phosphate

Which of the statements is incorrect about a spot-welded band?

b. A The spot-welded band measures 3/4 to 1 inch of the copper material

For there to be solid closure of margins on a posterior composite restoration, where should the prongs of the tension ring for the Palodent system to be placed?

between the band and the wedge

A matrix must be used to create a temporary wall for which of the following classifications of tooth restoration?

classes II, III, VI

Which type of cement is preferred for cementation of ceramic veneers?

composite resin

Which type of cements can be light-cured?

composite resin glass ionomer

The Tofflemire retainer that has been designed with a slight bend in the body to accommodate positioning from the lingual surface is known by what name?

contra angle

How should dental cements for dispensed for mixing?

dispense the powder first and then the liquid

Which statement is incorrect as it relates to preparing the tooth for a composite reaction?

dry the enamel and dentin completely

Tooth whitening or vital bleaching, is not indicated for a dental patient with which condition?

enamel hyperplasia

During a Class III restoration, the dentist will enter the tooth from the lingual in order to reduce the size of the restoration from the ___ aspect

facial

What step(s) should be followed before dispensing cement powder?

fluff and measure the powder

A comprehensive class II restoration can involve as many as ___ surfaces of a tooth.

four

What is the fastest most efficient way to whiten teeth?

in office treatments

The _____ is used to decrease the size of the matrix band loop after the band has been placed on the tooth.

inner knob

What could occur is excess cement is left at the cavosurface margin of a crown?

irritate the area and cause inflammation

Which type of dental cement is used as an adhesive for permanent indirect restorations?

luting

Which condition listed is of greatest concern to the operator when preparing a Class V restoration material?

nearness of the lesion to the gingiva

The larger side of the matrix band loop is always directed toward what part of the tooth?

occlusal one third

What is the component of a universal matrix band retainer that serves to hold the matrix band securely in the retainer?

outer knob

If a restoration is not contoured properly, it can result in an

overhang

When are temporary cements used?

placing provisional crowns

How should polycarboxylate cement appear once setting has initiated?

stringy or weblike

Which of the following is the correct cementing consistency for zinc phosphate cement?

stringy, breaking about 1 inch from the slab

Complete the statement: "When completing a permanent restoration, the dentist should have knowledge of

the size of and position of the pulp of the tooth"

A point angle is the junction of ___walls or surfaces that are coming from a different orientation.

three

Why is a matrix band contoured prior to placing the restorative material?

to ensure that the final restoration will have proper contact with the adjacent tooth

Which statement is incorrect concerning tooth whitening?

tooth whitening is permanent