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CNIH 170 Dental Hygiene Principals Exam with Approved Questions and Answers | Latest Update
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---12October 20242024/2025A+
- What are dental stains? - 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. - 1-Stain adheres directly to the surface of 
the tooth. 
2-Stain can be embedded in calculus and plaque depots. 
3-stains are incorporated within the tooth structure. 
There are 2 classifications of stains. - 1-Extrinsic 
2-Intrinsic 
What is an Extrinsic stain? - Stain on the surface of the tooth or teeth 
Can usually be removed by s...
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