Question 1

The universal,or Tofflemire,retainer holds the matrix band snugly in position and is most often positioned:

Accepted Answer

A)  toward the anterior of the mouth.
B)  on the buccal surface of the tooth being restored.
C)  on the lingual surface of the tooth being restored.
D)  toward the posterior of the mouth.E) None of the above
F) C) and D)

Question 2

To contour an anterior matrix band,pull the matrix lengthwise over a rounded surface such as a(n) :

Accepted Answer

A)  mirror handle.
B)  explorer.
C)  scaler.
D)  none of the above.E) None of the above
F) A) and D)

Question 3

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

Accepted Answer

A)  spindle
B)  outer knob
C)  inner knob
D)  guide channelsE) None of the above
F) B) and D)

Question 4

A(n)  _____ Tofflemire retainer has been designed with a slight bend in the body to accommodate positioning from the lingual surface.

Accepted Answer

A)  automatrix
B)  Palodent-type matrix band
C)  contra-angle
D)  spot-welded bandE) B) and C)
F) A) and B) C

Question 5

Mylar strips are used for class ___ restorations.

Accepted Answer

A)  I
B)  III
C)  V
D)  IIE) B) and C)
F) All of the above

Question 6

Which statement is not true concerning placement of the matrix retainer and band?

Accepted Answer

A)  The diagonal slotted surface of the retainer is always toward the gingiva.
B)  The handle of the retainer extends out from the oral cavity at the corners of the lips.
C)  The seated band extends two to three mm above the occlusal surface of the tooth.
D)  The retainer is positioned from the buccal side of the tooth.E) B) and C)
F) None of the above

Question 7

The material of choice for a posterior matrix band is::

Accepted Answer

A)  thin, flexible stainless steel.
B)  thick, rigid stainless steel.
C)  celluloid.
D)  thin, flexible copper.E) A) and B)
F) C) and D)

Question 8

Which of the following statements is true of posterior metal matrix bands?

Accepted Answer

A)  The smaller circumference of the band is the occlusal edge.
B)  The smaller circumference is placed toward the gingival edge.
C)  The larger circumference of the band is the gingival edge.
D)  The edge of the band is contoured in the proximal contact area.E) A) and B)
F) A) and C)

Question 9

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 ends begin to curl.

Accepted Answer

A)  a ball-point pen
B)  a burnisher or the end of a mirror handle
C)  a pencil eraser
D)  your fingerE) B) and C)
F) All of the above

Question 10

The purpose of contouring a matrix band is to:

Accepted Answer

A)  ensure that the band will fit the tooth being restored.
B)  curl the band to make it easier to fit the tooth.
C)  ensure that the final restoration will have proper contact with the adjacent tooth.
D)  ensure that there is no cupping of the final restoration.E) All of the above
F) None of the above

Question 11

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

Accepted Answer

A)  Class I and class V
B)  Class II and class IV
C)  Class II and class III
D)  Both b and cE) None of the above
F) B) and C)

Question 12

Excess restorative material that extends beyond the cavity margin is a/(n) :

Accepted Answer

A)  overhang.
B)  celluloid.
C)  cupping.
D)  diastema.E) B) and C)
F) A) and D)

Question 13

Once the automatrix band is positioned on the tooth,a tightening wrench is inserted into the coil and turned:

Accepted Answer

A)  counterclockwise to tighten the band.
B)  until the coil is snug around the tooth.
C)  clockwise to tighten the band.
D)  to form the contour around the tooth.E) B) and D)
F) B) and C)

Question 14

To create a solid closure of the cavity preparation for posterior composite restorations,the prongs of the tension ring for the Palodent systems are placed _____ the band and wedge.

Accepted Answer

A)  distal to
B)  between
C)  mesial to
D)  buccal toE) A) and B)
F) A) and C) B

Question 15

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

Accepted Answer

A)  Amalgam carrier
B)  Mouth mirror
C)  Howe pliers
D)  Cowhorn explorerE) None of the above
F) B) and D)

Question 16

The larger side of the universal matrix band loop is always toward the____ third of the tooth.

Accepted Answer

A)  gingival
B)  incisal
C)  occlusal
D)  buccalE) B) and D)
F) B) and C)

Question 17

What is the correct order of steps for preparing the T-band matrix?
1) Close the wings and pull the free end to make a small loop of the band.
2) Holding the free end of the band toward the facial,place the band loop on the tooth.
3) Bend the wings of the T-band to form a U-shape.
4) Slip the free end of the band through the U formation.

Accepted Answer

A)  1, 2, 3, 4
B)  2, 3, 4, 1
C)  3, 4, 1, 2
D)  1, 3, 4, 2E) A) and D)
F) A) and B)

Question 18

The _____ is used as a matrix system for the primary molars.

Accepted Answer

A)  T-band
B)  automatrix
C)  spot-welded band
D)  either a or cE) A) and B)
F) A) and C)

Question 19

An advantage of the automatrix system over the universal retainer is the automatrix system:

Accepted Answer

A)  is available in various sizes.
B)  needs no retainer to hold the band in place.
C)  does not require use of a wedge.
D)  requires no tightening of the band.E) None of the above
F) All of the above B

Question 20

Which statement is true concerning wedges?

Accepted Answer

A)  A wedge is used to apply pressure to the apical and gingival walls of the preparation.
B)  The wedge presses the band against the tooth, causing a slight separation of the teeth.
C)  The most commonly used type of wedge is the rounded plastic form.
D)  Both a and b are true statements.E) A) and B)
F) A) and C)

Exam 49: Matrix Systems for Restorative Dentistry

The universal,or Tofflemire,retainer holds the matrix band snugly in position and is most often positioned:

Correct Answer
verified

To contour an anterior matrix band,pull the matrix lengthwise over a rounded surface such as a(n) :

Correct Answer
verified

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

Correct Answer
verified

A(n) _____ Tofflemire retainer has been designed with a slight bend in the body to accommodate positioning from the lingual surface.

Correct Answer
verified
C

Mylar strips are used for class ___ restorations.

Correct Answer
verified

Which statement is not true concerning placement of the matrix retainer and band?

Correct Answer
verified

The material of choice for a posterior matrix band is::

Correct Answer
verified

Which of the following statements is true of posterior metal matrix bands?

Correct Answer
verified

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 ends begin to curl.

Correct Answer
verified

The purpose of contouring a matrix band is to:

Correct Answer
verified

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

Correct Answer
verified

Excess restorative material that extends beyond the cavity margin is a/(n) :

Correct Answer
verified

Once the automatrix band is positioned on the tooth,a tightening wrench is inserted into the coil and turned:

Correct Answer
verified

To create a solid closure of the cavity preparation for posterior composite restorations,the prongs of the tension ring for the Palodent systems are placed _____ the band and wedge.

Correct Answer
verified
B

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

Correct Answer
verified

The larger side of the universal matrix band loop is always toward the____ third of the tooth.

Correct Answer
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Correct Answer
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The _____ is used as a matrix system for the primary molars.

Correct Answer
verified

An advantage of the automatrix system over the universal retainer is the automatrix system:

Correct Answer
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B

Which statement is true concerning wedges?

Correct Answer
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Exam 49: Matrix Systems for Restorative Dentistry

The universal,or Tofflemire,retainer holds the matrix band snugly in position and is most often positioned:

Correct AnswerverifiedShow Answer

To contour an anterior matrix band,pull the matrix lengthwise over a rounded surface such as a(n) :

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A(n) _____ Tofflemire retainer has been designed with a slight bend in the body to accommodate positioning from the lingual surface.

Correct AnswerverifiedC

Mylar strips are used for class ___ restorations.

Correct AnswerverifiedShow Answer

Which statement is not true concerning placement of the matrix retainer and band?

Correct AnswerverifiedShow Answer

The material of choice for a posterior matrix band is::

Correct AnswerverifiedShow Answer

Which of the following statements is true of posterior metal matrix bands?

Correct AnswerverifiedShow Answer

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 ends begin to curl.

Correct AnswerverifiedShow Answer

The purpose of contouring a matrix band is to:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Excess restorative material that extends beyond the cavity margin is a/(n) :

Correct AnswerverifiedShow Answer

Once the automatrix band is positioned on the tooth,a tightening wrench is inserted into the coil and turned:

Correct AnswerverifiedShow Answer

To create a solid closure of the cavity preparation for posterior composite restorations,the prongs of the tension ring for the Palodent systems are placed _____ the band and wedge.

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

The larger side of the universal matrix band loop is always toward the____ third of the tooth.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The _____ is used as a matrix system for the primary molars.

Correct AnswerverifiedShow Answer

An advantage of the automatrix system over the universal retainer is the automatrix system:

Correct AnswerverifiedB

Which statement is true concerning wedges?

Correct AnswerverifiedShow Answer

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C

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B

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B

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