What Is the Function of the Inner Knob of a Tofflemire

question 18

Multiple Choice

What is the function of the inner knob of a Tofflemire band retainer?

• A)It adjusts size or loop of matrix band to fit around tooth.
• B)It slides up and down on spindle to secure band in place.
• C)It tightens or loosens matrix band in the retainer.
• D)It holds the matrix band in the retainer.

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