Card Set Information
ch 19 dental stains and discolorations
t/f extrinsic staining must be removed with whitening or bleaching
FALSE can be removed with scaling and polishing
where is extrinsci stain located?
on the outside of the tooth
wher eis intrinsic stain located?
inside the tooth and cannot be removed
what is an example of an exogenous stain?
what is an example of endogenous stain?
wher eodes exogenous stain come from?
originates outside the body
where does endogenous stain originate?
inside the body
what are two methods of stain removal?
what are some cautions to be aware of when removing stain? 2
use light pressure don't want to put grooves in cementum
u/s don't overheat tooth
what are the most frequently observed extrinsic stains? 4
what are some less common extrinsic stains? 3
what cuase of the yellow coloration of stain?
what is the etiology of yellow stain?
t/f the yellow stain is associated with the presence of dental biofilm
what are the three forms of green stain?
small curved line following contour of facial gingival crest
smeared irregularly, may even cover entire facial surface
streaked, following grooves or lines in enamel
t/f green stain is always embedded in tooth deposit
false in biofilm can become intrinsic though
t/f the enamel under green stain can become demineralized?
what causes demineralization of enamel under green stain?
_____ bacteria or gungi are retained and nourished in dental biofilm where the green stain is produced
green discoloration may result from 3 things what are they?
metallic dusts of industry
certain drugs (MJ)
black line stains are along the _____ third of the tooth and follows the ____ _____ contour
gingival crest contour
t/f black line stain is mostly found in males and tobacco users
FALSE! Women and in clean mouths
black line stain is like ______ and is compsed of microorganisms embedded in an intermicrobial substance
what is the color of tobacco stain?
dpends on type of tobacco used (light brown to dark leathery brown or black)
tobacco stan may cover the ____ third to the _____ tird of crown
t/f tobacoo stain is incorporated in calculus deposit and can penetrate the enamel and become exogenous intrinsic
t/f the amount of tobacco stain is proportional to the amount of tobacco used
FALSE it is not proportional to the amount of tobacco used
where is tobacco stain most frequently found?
lingual surfaces of lower anterior
what is brown pellicale stain similar to?
black line stain (recurs readily after removal)
what foodstuffs cause brown stain?
what is an antibiofilm agent that causes brown stains?
t/f antibioflim agents such as chlorahexidine stain the enamel more rapidly than exposed roots
false! stain roots more rapidly than enamel
t/f betel has a caries inhibiting effect
betel leaf consists of microorgnisms and mineralized material with a laminated pattern characterist of ___ ___
how is betel leaf stain removed
t/f betel leaf is a cultural habit
t/f orange stain is more rare than red
FALSE red is more rare (your red meat is really rare, its still mooing)
where do red or orange stains appear?
on the cervical third of anterior teeth
what is the etiology of red and orange stains
where do metallic stains come from?
industrial workers inhale dust
t/f endogenous intrinsic stains may be related to the period of tooth development
in pulpless teeth pgments from the decomposed hemoglbin and pulp tissue may penetrate what?
what trimester does tetracyclines affect the baby?
third trimester (when teeth are being developed)
when would taking tetracyclines affect the adult teeth?
infancy and early childhood
t/f the discoloration of teeth from tetracycline is dependant on dosage, length of time ad type of tetracycline taken
is discoloration from tetracycline generalized or limited to specific parts of teeth?
both depends on time of administration of antibiotic
what are two forms of hereditary imperfect tooth developments?
what is it when the enamel is partially or completely missing because of a generalized disturbance of the ameloblast? what color would the teeth be?
yellowish brown or gray brown
what is it called when the dentin is abnormal as a result of disturbances in the odontoblastic layer during development? what color would the teeth appear to be?
translucent or opalexcent and vary in color from gray to bluish brown
what are two types of enamel hypoplasia?
systemic and local hypoplasia
what type of enamel hypoplasia affects a single tooth?
what type of enamel hypoplasia is it when teeth erupt with white spots or with pits?
t/f with systemic and local hypoplasia the white spots may become discolored from food pigments or other substances taken into the mouth
what is enamel hypomineralization result from?
ingestion of excessive fluoride ion in drinking water (more than 2 parts per million) during the period of mineralization
t/f enamel hypomineralization is a result from toxic damage to the ameloblast from excessive fluoride intake
t/f pigments circulating in the blood are transmitted to the dentin from the capillaries of the pulp and can cause discolorations
t/f jaudice early in life can impart a yellow or greenish discoloration to the teeth
what causes erythroblastosis fetalis?
Rh incompatibility (Rh-)
what color would teeth appear for erythroblastosis fetalis?
green, brown or blue
when intrinsic stains come from outside source not from within the tooth what are they called?
what are two extrinsic stains that can provide stain that becomes intrinsic?
what restorative materials can cause exogenous intrinsic stains?
_____ ions of silver amalgams migrate from the amalgam restoration into the _____ and _____
enamel and dentin
what materials used in endo can cause intrinsic stains and what colors would they stain? 5
silver nitrate- bluish-black
silver containing root canal sealer-black
what is dentin stain usually caused by?
what must be recorded about stain? 5