The ______ is used to decrease the size of the matrix band loop after the band has been placed on the tooth.
A)spindle
B)outer knob
C)inner knob
D)guide channel

Question

Quizplus · Accepted Answer

The inner knob is used to increase or decrease the size of the matrix band loop after it has been placed on the tooth.The band is to fit snugly around to the tooth during the restoration.
The spindle runs the length of the retainer.
The outer knob is used to tighten the spindle within the diagonal slot.
The guide channel is used to direct the loop according to the quadrant being treated.

The ______ Is Used to Decrease the Size of the Matrix