FREE DENTISTRY AND STUDY GAMES ABOUT CHAPTER 49

PDF Download

FREE DENTISTRY AND STUDY GAMES ABOUT CHAPTER 49

MATRIX EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -17 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Why can't a stainless steel matrix band be used with composites?

Answer:

Metal bands scratch composites

Question 2: What is the plural of matrix?

Answer:

Matrices

Question 3: What can result from improper wedge placement?

Answer:

Overhang or cupping

Question 4: This is used as a matrix system for the primary molars.

Answer:

the T-band or the spot-welded band

Question 5: A _____ Tofflemire retainer has been designed with a slight bend in the body to accommodate positioning from the lingual surface.

Answer:

contra-angle Question 6: What additional item is used in the matrix system to re-establish a proper contact with an adjacent tooth?

Answer:

a wedge Question 7: When placing a matrix band, where is the smaller circumference of the band placed?

Answer:

toward the gingiva Question 8: What is another term for a thin polished matrix band used for posterior composites?

Answer:

palodent

Question 9: What is used to contour a metal matrix band for posterior teeth?

Answer:

a burnisher or the end of a mirror handle

Question 10: What is the instrument of choice when positioning a wooden wedge?

Answer:

Howe pliers Question 11: When a posterior metal matrix band and retainer are placed, the seated matrix band should extend approximately _______ below the gingival margin of the preparation.

Answer:

• mm

Question 12: This matrix is used for anterior composite resin or glass ionomer restorations.

Answer:

clear plastic

Question 13: What matrix system is an alternative to the universal retainer?

Answer:

automatrix

Question 14: What is another term for a clear plastic matrix?

Answer:

Mylar strip Question 15: What is the most common matrix system used for class II posterior restorations?

Answer:

Tofflemire retainer and matrix band Question 16: What classification(s) of cavity preparation would use a posterior matrix system?

Answer:

class II Question 17: A matrix must be used to create a temporary wall for which classifications of tooth restoration?

Answer:

a class II, III, or IV