Which of the Following Reasons Explains Why Subgingival Calculus Is

question 26

Multiple Choice

Which of the following reasons explains why subgingival calculus is usually black?

• A)Supragingival saliva
• B)Crevicular fluid
• C)Subgingival enzymes
• D)Salivary crystals

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Definitions:

Semi-Annual Interest

Interest that is calculated and paid twice a year, typically used for bonds and loans.

Bonds

Fixed income investments where an investor loans money to an entity (corporate or governmental) that borrows the funds for a defined period at a fixed interest rate.

Coupon Rate

The interest rate that an issuer of a bond pays to a holder, expressed as a percentage of the bond's face value, paid regularly until maturity.

Yield To Maturity

The total return anticipated on a bond if it is held until the date it matures, considering all interest payments and the principal repayment.