Intact Enamel Surfaces Are Not Damaged When Extrinsic Stain Removal

question 8

Multiple Choice

Intact enamel surfaces are not damaged when extrinsic stain removal is accomplished with the air polisher. However, prolonged use of air polishing on cementum and dentin can remove significant tooth structure and should be avoided.

• A) Both statements are true.
• B) Both statements are false.
• C) The first statement is true, and the second statement is false.
• D) The first statement is false, and the second statement is true.

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Definitions:

Plasma Membrane

The lipid bilayer membrane that encloses the cytoplasm of a cell, controlling the movement of substances in and out of the cell.

Polarity

The condition of having distinct and opposite ends or poles, often relating to molecule orientation or cell differentiation.

Sarcomere

The fundamental unit of striated muscle tissue, responsible for muscle contraction, defined by the area between two Z lines.

Contracted Sarcomere

A sarcomere that has shortened in length, due to the sliding of actin and myosin filaments, leading to muscle contraction.