Question

Where should the cervical margin of a matrix band lie?

A) Below the contact area
B) Above the contact area
C) On the contact area
D) Overlapping the adjacent tooth
E) Inside the pulp chamber

Answer 1

The cervical margin of a matrix band should be placed below the contact area of the tooth during a dental filling procedure.

Step-by-step explanation:

The cervical margin of a matrix band should lie below the contact area of the tooth when restoring a tooth with a dental filling. The purpose of the matrix band is to help in the reconstruction of the tooth's natural contour and to support the dental material until it is set. It should not extend above the contact area, as this may interfere with the contact between adjacent teeth, nor should it overlap the adjacent tooth or enter the pulp chamber, as these would be improper placements that could lead to complications.