California Registered Dental Assistant (RDA) Written Practice Exam

What cavity classification indicates the use of an anterior dental dam clamp?

1. Class I

2. Class II

3. Class III

4. Class IV

The correct answer is: Class III

A Class I cavity is located on the surface of the tooth, while a Class II cavity involves the interproximal surfaces (between two teeth). Both of these cavity classifications would not require the use of an anterior dental dam clamp. A Class III cavity is on the anterior (front) surface of a tooth, which would require the use of an anterior dental dam clamp. A Class IV cavity involves both the interproximal and anterior surfaces, and would also require the use of an anterior dental dam clamp. Therefore, the correct cavity classification that indicates the use of an anterior dental dam clamp is Class III.