Matrix systems for Restorative Dentistry
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| A matrix must be used to create a temporary wall for which classifications of tooth restoration? | a class II, III, or IV
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| What classification(s) of cavity preparation would use a posterior matrix system? | class II
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| What is the most common matrix system used for class II posterior restorations? | Tofflemire retainer and matrix band
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| A _____ Tofflemire retainer has been designed with a slight bend in the body to accommodate positioning from the lingual surface. | contra-angle
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| When placing a matrix band, where is the smaller circumference of the band placed? | toward the gingiva
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| What is the plural of matrix? | Matrices
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| This matrix is used for anterior composite resin or glass ionomer restorations. | clear plastic
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| This is used as a matrix system for the primary molars. | the T-band or the spot-welded band
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| What is used to contour a metal matrix band for posterior teeth? | a burnisher or the end of a mirror handle
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| What additional item is used in the matrix system to re-establish a proper contact with an adjacent tooth? | a wedge
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| What can result from improper wedge placement? | Overhang or cupping
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| What is the instrument of choice when positioning a wooden wedge? | Howe pliers
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| Why can’t a stainless steel matrix band be used with composites? | Metal bands scratch composites
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| What is another term for a clear plastic matrix? | Mylar strip
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| What matrix system is an alternative to the universal retainer? | automatrix
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| What is another term for a thin polished matrix band used for posterior composites? | palodent
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| When a posterior metal matrix band and retainer are placed, the seated matrix band should extend approximately _______ below the gingival margin of the preparation. | 1 mm
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Created by:
cynthia.fryer
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