QUESTION: Critical pH of developing cavity?
QUESTION: pH that enamel starts to demineralize –
QUESTION What can tell best thing about caries:
past caries history
QUESTION Which is least likely to predict future caries?
Amount of sugar intake
Frequency of sugar intake
Amount of caries and restorations
(I would have prob put amount of caries and restorations b/c this is known to be an indicatior of
past caries not future caries.)
QUESTION: 3 factors that affect caries initiation? substrate, bacteria, host susceptibity
QUESTION: Which of the following is the earliest clinical sign of a carious lesion?
B. Patient sensitivity
C. Change in enamel opacity
D. Rough surface texture
E.Cavitation of enamel
QUESTION: What is true of Strep. mutans?
• Can live in plaque,
• Can live on gingival
• Can live in a child with no teeth
• Has to live on a non-shedding surface
QUESTION: Most Cariogenic? Sucrose… S.mutans adheres to the biofilm on the tooth by converting sucrose into an extremely adhesive substance called dextran polysaccharid.
QUESTION: How do cells first attach- dextran or lextran?
QUESTION: Caries progression –
QUESTION: what contributes to caries formation
QUESTION: What helps in carious process but it is not the primary inititator for caries:
QUESTION: Lactobacillus: does not initiate caries but is part of the progression of caries
QUESTION What is the most important etiologic factor in getting caries?
QUESTION: Which race has most caries in kid population?
QUESTION: What race for children has highest caries incidence?
QUESTION: early childhood cariescentrals and molars
QUESTION: Which population has the most number of UNRESTORED caries
QUESTION: White females have the most caries in permanent teeth
QUESTION: Know how to determine if a patient is a high caries risk?
QUESTION: most recent increase in caries is seen in:
QUESTION: New data regarding caries shows:
more smooth surface caries,
more pit-fissure caries,
same, more root caries
a. More root caries
QUESTION: Recent survey, what kind of stats on caries?
• inc in smooth surf caries – wrong
• inc in pit/fissure caries – wrong
• smooth surf caries and pit/fissure caries is same – wrong
• inc in root caries****
QUESTION: How do you diagnose root caries?
QUESTION: Best indicator of root caries is a soft spot
QUESTION: best clinical determinant of root caries ?
sensitivity to cold
sensitivity to sweets
soft spot on tooth –
QUESTION: Remineralized teeth are they stronger than regular enamel
QUESTION: For a lesion in enamel that has remineralized, what most likely is true?
1. The enamel has smaller hydroxyapatite crystals than the surrounding enamel,
2. The remineralized enamel is softer thanthe surrounding enamel,3. The remineralized enamel is darker than the surrounding enamel,
4. The remineralized enamel is rough and cavitated
QUESTION: Sign of remineralization:
rougher than tooth structure and darker, but not sure
QUESTION: What’s the characteristic of a remineralized tooth?
Darker, harder, more resistant to acid
QUESTION: Remineralized lesion is shiny and more resistant to future decay
QUESTION: Characteristic of a lesion that is remineralized:
black, dark, bright
black, dark, opaque
black, dark, cavitated
QUESTION: remineralized lesions, yellow: -more resistant to future caries
Harder than normal. (Pit and fissure are most prevalent caries)
QUESTION: What does arrested caries look like?
QUESTION: Leathery brownwhite lesion?
arrested, acute, chronic
QUESTION: Scleoritc dentin:
harder, better to bond to?
QUESTION: Which of these is NOT an important reason for a clinician to be able to distinguish
QUESTION: What is the most common site of enamel caries?
• pit and fissure*
• at the contact point
QUESTION: Where does caries start?
Apical to proximal contact.
QUESTION: location of interproximal caries lesion :
below the contact
QUESTION: Most interproximal decay happens where?
– Just under the contact.
QUESTION: A class II caries is
: Apical to contact
QUESTION: When do you restore a lesion? –
When there is cavitation
QUESTION: When do you tx caries: half way to the enamel, through enamel, when you can see it
on xray (NO) Answer: cavitation
QUESTION: In which of these cases do you start restoration:
can see on x-ray,
lesion ½ into enamel,
cross CEJ (not DEJ)
QUESTION: when you start to do a caries :
a) more than half way into enamel
b) in the DEJ
c) in CEJ
d) when you see it in the xray
QUESTION: When do you restore a tooth?
a. Either when its CAVITATED
when its ½ in enamel (but this can remineralize..)?
b. Nothing about dentin involvement