Mental Dental Operative| 213
questions| all answers 100% correct
What does the carbonate do to the hydroxyapatite? Correct Answer:
Increases its solubility
Why is a cavity deeper into the tooth into more soluble parts of the
enamel? Correct Answer: Because the outside tends to be fluoroapatite
and the inside tends to be carbonate-substituted hydroxyapatite
Lactic acid is produced by bacteria in the mouth via what process?
Correct Answer: Fermentation
What is the critical pH of normal tooth enamel? Correct Answer: 5.5
What is the critical pH of fluoride teeth? Correct Answer: 4.5
What 3 things does fluoride do to reduce cavities? Correct Answer: 1.
remineralizes teeth
2. decreases enamel solubility
3. interferes with metabolic activity of cariogenic bacteria
What is the critical pH for dentin and cememtum? Correct Answer: 6.2-
6.7
Caries are modeled by what diagram? Correct Answer: Modified keyes-
jordan diagram
Pit and fissure lesions are what shape? Correct Answer: Inverted v-
shape
Smooth surface lesions are what shape? Correct Answer: V shape
,Compare infected dentin with affected dentin? Correct Answer: Infected
= superficial, wet, soft, mushy, necrotic
Affected = deeper, dry, leathery, demineralized but not invaded by
bacteria
How long can it take for an intact surface to go from intact surface to
cavitation? Correct Answer: 1-2 years
What is the process for progression of a lesion? Correct Answer:
Enamel demineralization
Dentin demineralization
Enamel cavitation
Dentin cavitation
Incipient caries looks like what? Correct Answer: Opaque white when
dried
Simple cavity? Correct Answer: covers one surface
Compound cavity? Correct Answer: 2 surfaces
Complex cavity? Correct Answer: 3+ surfaces
Primary lesion? Correct Answer: Original caries lesion - can have
multiple original caries on single tooth depending on location
Secondary/recurrent lesion? Correct Answer: Occurs at junction of
tooth and restoration indicating microleakage
Residual lesion? Correct Answer: Caries that remain in a completed
tooth prep
Compare the color of the following:
1. Acute/rampant caries
, 2. Chronic/slow caries
3. Arrested caries Correct Answer: 1. light colored
2. discolored
3. dark/black
Strep mutans produces what? Correct Answer: Glucosyltransferase that
helps it stick to the teeth
What are the main bugs for:
1. Enamel caries
2. Dentinal caries
3. Root caries Correct Answer: 1. Strep mutans
2. Lactobacillus
3. Actinomyces
Saliva has the following things, what do they do?
1. Glucoproteins
2. Lysozyme
3. Lactoferrin
4. Lactoperoxidase
5. sigA Correct Answer: 1. bind bacteria together
2. destroys cell walls
3. binds and inactivates iron
4. inactivates bacterial enzymes
5. IgA
Why are radiographic lesions smaller than reality? Correct Answer: It
takes 30-40% demineralization before we even see anything
Transillumination is good for caries, but also for what?
How does it help with this? Correct Answer: 1. Distinguishing craze
lines from fractures
2. Fractures won't let the light pass through
questions| all answers 100% correct
What does the carbonate do to the hydroxyapatite? Correct Answer:
Increases its solubility
Why is a cavity deeper into the tooth into more soluble parts of the
enamel? Correct Answer: Because the outside tends to be fluoroapatite
and the inside tends to be carbonate-substituted hydroxyapatite
Lactic acid is produced by bacteria in the mouth via what process?
Correct Answer: Fermentation
What is the critical pH of normal tooth enamel? Correct Answer: 5.5
What is the critical pH of fluoride teeth? Correct Answer: 4.5
What 3 things does fluoride do to reduce cavities? Correct Answer: 1.
remineralizes teeth
2. decreases enamel solubility
3. interferes with metabolic activity of cariogenic bacteria
What is the critical pH for dentin and cememtum? Correct Answer: 6.2-
6.7
Caries are modeled by what diagram? Correct Answer: Modified keyes-
jordan diagram
Pit and fissure lesions are what shape? Correct Answer: Inverted v-
shape
Smooth surface lesions are what shape? Correct Answer: V shape
,Compare infected dentin with affected dentin? Correct Answer: Infected
= superficial, wet, soft, mushy, necrotic
Affected = deeper, dry, leathery, demineralized but not invaded by
bacteria
How long can it take for an intact surface to go from intact surface to
cavitation? Correct Answer: 1-2 years
What is the process for progression of a lesion? Correct Answer:
Enamel demineralization
Dentin demineralization
Enamel cavitation
Dentin cavitation
Incipient caries looks like what? Correct Answer: Opaque white when
dried
Simple cavity? Correct Answer: covers one surface
Compound cavity? Correct Answer: 2 surfaces
Complex cavity? Correct Answer: 3+ surfaces
Primary lesion? Correct Answer: Original caries lesion - can have
multiple original caries on single tooth depending on location
Secondary/recurrent lesion? Correct Answer: Occurs at junction of
tooth and restoration indicating microleakage
Residual lesion? Correct Answer: Caries that remain in a completed
tooth prep
Compare the color of the following:
1. Acute/rampant caries
, 2. Chronic/slow caries
3. Arrested caries Correct Answer: 1. light colored
2. discolored
3. dark/black
Strep mutans produces what? Correct Answer: Glucosyltransferase that
helps it stick to the teeth
What are the main bugs for:
1. Enamel caries
2. Dentinal caries
3. Root caries Correct Answer: 1. Strep mutans
2. Lactobacillus
3. Actinomyces
Saliva has the following things, what do they do?
1. Glucoproteins
2. Lysozyme
3. Lactoferrin
4. Lactoperoxidase
5. sigA Correct Answer: 1. bind bacteria together
2. destroys cell walls
3. binds and inactivates iron
4. inactivates bacterial enzymes
5. IgA
Why are radiographic lesions smaller than reality? Correct Answer: It
takes 30-40% demineralization before we even see anything
Transillumination is good for caries, but also for what?
How does it help with this? Correct Answer: 1. Distinguishing craze
lines from fractures
2. Fractures won't let the light pass through
