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CNIH 170 Dental Hygiene Principals With Questions And 100% ALL SURE ANSWERS
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CNIH 170 Dental Hygiene Principals With Questions And 100% ALL SURE ANSWERS
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JACKLINECNIH 170 Dental Hygiene Principals With Questions And 100% ALL SURE ANSWERS
What are dental stains? Stain is a discolored spot or area on the tooth that contrasts with the rest of the tooth color.
1- Stain adheres directly to the surface of the tooth.
Name the 3 basic ways a stain occurs? 2- Stain can be embedded in calculus and plaque depots.
3-stains are incorperated with in the tooth structure.
1-Extrinsic
There are 2 classification of stains.
2-Intrinsic
Stain on surface of the tooth or teeth
What is a Extrinsic stain? Can usually be removed by scaling with hand-activation, ultrasonic instrumentation, rubber-
cup & airpolishing.
Stain within the tooth or teeth.
What is a Intrinsic stain?
Cannot be removed by scaling or polishing.
1-Endogenous
What is the 2 classification of a intrinsic stain?
2-Exogenous
CNIH 170 Dental Hygiene Principals
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, Acquired during tooth development within the tooth from developmental & systemic
disturbances
Explain endogenous stains:
From medications such as tetracycline
Acquired after the tooth has erupted
Explain exogenous stains:
Originates outside the tooth & are caused by environmental agents
Heredity
Developmental due to:
-high fevers
What causative factors can intrinsic stains be? -trauma
-excessive intake of fluoride
-tetracycline
Appearance: moltted or stained appearance to the tooth
Extrinsinc stains are always exogenous
Intrinsic stains may originate from exogenous or endogenous sources
Review: Stains are primarily anesthetic problem
For stains that cannot be removed, there are other treatment options such as professionnal & at
home bleaching procedures enamel microabrassion, cosmetic restorative procedures
1. Grenn stains
2. Black line stains
Name all four extrinsic stains:
3. Tobacco stains
4. Yellow stains
From bacteria left in the mouth
Smoking cigarettes, cigars or pipes
Spit tobacco, marijuana
Possible causes of stains: Chlorhexidine rinse
Tea coffee, cola, berries, red wine
Iron tablets
Poor oral hygiene
Scaling by hand (least abrasive)
Ultrasonic instrumentation
What are the methods of extrinsic stain removal?
Rubber cup polishing
CNIH 170 Dental HygieneAirPrincipals
polishing
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