The Best Way to Remove the Black Line Stain on the Lingual

question 5

Multiple Choice

The best way to remove the black line stain on the lingual aspects of both arches is to:

• A)Polish with coarse grit pumice using a motor-driven handpiece
• B)Use a slim-diameter ultrasonic tip with a straight working end to remove the stain
• C)Use a Nabers diamond-coated file (This instrument has a similar design as a Nabers furcation probe and is diamond coated.)
• D)Use a universal curet to remove the stain

---

Definitions:

Productive Capacity

The maximum output a system can produce in a specific period under normal working conditions.

Milling Machine

A machine tool used to machine solid materials by removing material in the form of chips using a rotating cutting tool.

Direct Labor Hours

The amount of time workers spend directly manufacturing a product or providing a service, used to allocate labor costs in production.

Variable Selling

Costs related to selling that vary with sales activity, such as sales commission.