Question 1

Which statement is correct concerning the purpose of the anterior matrix systems? (Select all that apply.)

Accepted Answer

A)  The matrix protects the adjacent tooth during preparation.
B)  The clear plastic allows the curing light to penetrate the material, completing the curing process.
C)  The matrix protects the adjacent teeth from the materials.
D)  The matrix helps in reconstructing the natural contour of the tooth.
E)  The height of the band signifies the height of the marginal ridge.F) B) and E)
G) A) and B)

Question 2

What is the component of a universal matrix retainer that serves to guide the direction of the matrix loop according to the quadrant that is being treated called?

Accepted Answer

A)  Spindle
B)  Outer guide slots
C)  Inner knob
D)  Diagonal slotE) B) and D)
F) None of the above

Question 3

What is the purpose of a matrix system?

Accepted Answer

A)  Retain and support the restoration.
B)  Provide a temporary interproximal wall for the restorative material.
C)  Create an external surface against which the restorative material is packed.
D)  Both b and c are correct.E) All of the above
F) B) and D)

Question 4

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) C) and D)
F) B) and D)

Question 5

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?

Accepted Answer

A)  AutoMatrix
B)  Palodent-type matrix band
C)  Contra-angle
D)  Spot-welded bandE) A) and C)
F) B) and C)

Question 6

Where should the cervical margin of a matrix band lie?

Accepted Answer

A)  One millimeter beyond the gingival floor
B)  Three milliliters beyond the gingival floor
C)  One millimeter above the gingival floor
D)  At the level of the gingival floorE) B) and C)
F) A) and D)

Question 7

Which matrix system is used for anterior composite resin or glass ionomer restorations?

Accepted Answer

A)  AutoMatrix
B)  Clear plastic matrix
C)  Tofflemire
D)  T-bandE) None of the above
F) C) and D)

Question 8

What is the term for excess restorative material that extends beyond the cavity margin?

Accepted Answer

A)  Overhang
B)  Celluloid
C)  Cupping
D)  DiastemaE) All of the above
F) None of the above

Question 9

Mylar strips are used for class ___ restorations.

Accepted Answer

A)  I
B)  II
C)  III
D)  VE) None of the above
F) All of the above

Question 10

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

Accepted Answer

A)  T-band
B)  AutoMatrix
C)  Spot-welded band
D)  Either a or cE) C) and D)
F) A) and B)

Question 11

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

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 mouthE) A) and B)
F) A) and C)

Question 12

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

Accepted Answer

A)  Classes I and V
B)  Classes II and IV
C)  Classes II and III
D)  Both b and cE) A) and B)
F) A) and C)

Question 13

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) B) and D)
F) None of the above

Question 14

How would an anterior matrix band be contoured?

Accepted Answer

A)  Mirror handle
B)  Explorer
C)  Scaler
D)  MandrelE) All of the above
F) B) and C)

Exam 49: Matrix Systems for Restorative Dentistry

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

Correct Answer
verified

What is the term for excess restorative material that extends beyond the cavity margin?

Correct Answer
verified

Mylar strips are used for class ___ restorations.

Correct Answer
verified

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

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 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?

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

What is the component of a universal matrix retainer that serves to guide the direction of the matrix loop according to the quadrant that is being treated called?

Correct Answer
verified

Which matrix system is used for anterior composite resin or glass ionomer restorations?

Correct Answer
verified

Which statement is correct concerning the purpose of the anterior matrix systems? (Select all that apply.)

Correct Answer
verified

How would an anterior matrix band be contoured?

Correct Answer
verified

What is the purpose of a matrix system?

Correct Answer
verified

Where should the cervical margin of a matrix band lie?

Correct Answer
verified

Exam 49: Matrix Systems for Restorative Dentistry

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

Correct AnswerverifiedShow Answer

What is the term for excess restorative material that extends beyond the cavity margin?

Correct AnswerverifiedShow Answer

Mylar strips are used for class ___ restorations.

Correct AnswerverifiedShow Answer

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

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 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?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the component of a universal matrix retainer that serves to guide the direction of the matrix loop according to the quadrant that is being treated called?

Correct AnswerverifiedShow Answer

Which matrix system is used for anterior composite resin or glass ionomer restorations?

Correct AnswerverifiedShow Answer

Which statement is correct concerning the purpose of the anterior matrix systems? (Select all that apply.)

Correct AnswerverifiedShow Answer

How would an anterior matrix band be contoured?

Correct AnswerverifiedShow Answer

What is the purpose of a matrix system?

Correct AnswerverifiedShow Answer

Where should the cervical margin of a matrix band lie?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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