CNIH 170 Dental Hygiene Principals Exam Questions With 100% Correct Answers 2025/2026

CNIH 170 Dental Hygiene Principals Exam Questions With 100% Correct Answers 2025/2026 What are dental stains? - answer-Stain is a discolored spot or area on the tooth that contrasts with the rest of the tooth color. Name the 3 basic ways a stain occurs? - answer-1-Stain adheres directly to the surface of the tooth. 2-Stain can be embedded in calculus and plaque depots. 3-stains are incorperated with in the tooth structure. There are 2 classification of stains. - answer-1-Extrinsic 2-Intrinsic What is a Extrinsic stain? - answer-Stain on surface of the tooth or teeth Can usually be removed by scaling with hand-activation, ultrasonic instrumentation, rubber-cup & airpolishing. What is a Intrinsic stain? - answer-Stain within the tooth or teeth. Cannot be removed by scaling or polishing. What is the 2 classification of a intrinsic stain? - answer-1-Endogenous 2-Exogenous Explain endogenous stains: - answer-Acquired during tooth development within the tooth from developmental & systemic disturbances From medications such as tetracyclineExplain exogenous stains: - answer-Acquired after the tooth has erupted Originates outside the tooth & are caused by environmental agents What causative factors can intrinsic stains be? - answer-Heredity