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FREE DENTISTRY AND STUDY GAMES ABOUT CHAPTER 49
MATRIX EXAM QUESTIONS
Qs and Ans Expert- Explanation
This Exam contains:
-Guarantee passing score -17 Questions and Answers -format set of multiple-choice -Expert- 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
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