Chapter 49 Flashcards

Front

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

Back

Classes II, III, and IV

Front

Which matrix system used for Class II posterior restorations is the most common?

Back

Tofflemire retainer and universal band

Front

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

Back

On the buccal surface of the tooth being restored

Front

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

Back

Clear plastic matrix

Front

The smaller circumference is placed toward the

Back

gingiva

Front

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.

Back

a burnisher or the end of a mirror handle

Front

Where should the cervical margin of a matrix band lie?

Back

1 mm below the gingival margin of the preparation

Front

What is the purpose of a matrix system?

Back

To provide a temporary interproximal wall for the restorative material

Front

What is the material of choice for a universal matrix band?

Back

Thin, flexible stainless steel

Front

If a cusp is lost during preparation, which matrix band would provide the best support while restoring?

Back

Extension