The component of the universal matrix retainer that holds the matrix band securely in the device is the:
A)spindle.
B)guide channels.
C)inner knob.
D)diagonal slot.

Question

Quizplus · Accepted Answer

The spindle is the part that holds the matrix band securely in the device. It is located on the outer knob and inserts into the center of the matrix band to hold it in place during restorative procedures. Therefore, option A is the correct answer. The guide channels help to align the band with the tooth being restored, the inner knob is used to adjust the tension of the device, and the diagonal slot is used to lock the device in place once it is properly positioned.

The Component of the Universal Matrix Retainer That Holds the Matrix