Term
5. In comparison to ceramics, metals are
A. more esthetic
B. harder
C. stronger
D. tougher
E. poor electrical conductors |
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Definition
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Term
8. Ductility or plastic deformation is related to
A. the initial straight portion of the stress-strain diagram
B. the point where the straight portion first deviates
C. the curved region beyond the initial straight portion
D. the point where the material breaks (maximum stress) |
|
Definition
| C. the curved region beyond the initial straight portion |
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Term
9. It is difficult to image structural features with in teeth (dental caries for example) and
most other biological tissues at visible wavelengths due to:
A. strong light absorption
B. strong light transmission
C. strong light scattering
D. strong fluorescence
E. strong reflectance |
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Definition
| C. strong light scattering |
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Term
10. What causes fluorescence with the Diaenodent?
A. dentin
B. enamel
C. porphyrins
D. Streptococcus mutans
E. Lactobaccili |
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Definition
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Term
I l. Early caries lesions (white-spot lesions) appear whiter due to:
A. increased light absorption
B. increased light scattering
C. increased staining
D. increased light refraction
E. increased pigmentation |
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Definition
| B. increased light scattering |
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Term
12.The size and distribution of particles and structures in biological tissues and dental
restorative materials are most likely to influence:
A. the magnitude of fluorescence
B. the dependence of light scattering on wavelength
C. the refractive index
D. the reflectance at the surface
E. the magnitude of absorption |
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Definition
| E. the magnitude of absorption |
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Term
13. Caries:
A) Is an infectious disease
B) Causes localized dissolution and destruction of the tooth structure
C) Involves Strep Mutans type bacteria
D) All of the above |
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Definition
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Term
14. Salivary flow is a major factor in Caries susceptibility. What factors can affect saliva
flow?
A) Anti-depressant medications
B) Systemic diseases such as Sjogren's Syndrome
C) Getting older
D) All of the above |
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Definition
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Term
15. The Turbid Layer in a carious lesion:
A) Is infected with bacteria and must be removed
B) Will not stain with caries indicating liquid
C) May be re-minenlized with tluorides
D) Is always darker than the dentin |
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Definition
| A) Is infected with bacteria and must be removed |
|
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Term
16. Tertiary Dentin refers to dentin that is deposited after eruption of the tooth and is:
A) the same as secondary dentin
B) the pulp's response to trauma such as caries
C) the normal deposition of dentin over time
D) All of the above |
|
Definition
| B) the pulp's response to trauma such as caries |
|
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Term
17. Once the caries reaches the DEJ:
A) We may decide to re-mineralize with Xylitol
B) We should seal the tooth
C) We should treat it because the caries may spread rapidly along the DEJ and into
the dentin
D) We should hold treatment and take radiographs ayear later to check it's progress |
|
Definition
C) We should treat it because the caries may spread rapidly along the DEJ and into
the dentin |
|
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Term
18. When using a round bur in removing caries in the deeper areas, we should:
A) Use a high speed handpiece with a light touch
B) Use a slow speed handpiece and cut on the outstroke
C) Use the smallest round bur possible
D) All of the above are acceptable |
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Definition
| B) Use a slow speed handpiece and cut on the outstroke |
|
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Term
19. If you remove deep caries and get a small pinpoint vital pulp exposure, you should:
A) Place a liner of Resin Modified Glass Ionomer (Fuji II LC)
B) Place a liner of pure Glass Ionomer (Fuji IX)
C) Place a very small amount of Calcium Hydroxide paste (Life) over the exposure
with a subsequent liner of Glass lonomer
D) Place a thich liner of Calcium Hydroxide paste over the exposure and the exposed
dentin |
|
Definition
C) Place a very small amount of Calcium Hydroxide paste (Life) over the exposure
with a subsequent liner of Glass lonomer |
|
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Term
20. After we have removed the shallower areas of decay, we should:
A) Proceed to the deepest areas
B) Modifr our preparation by removing undermined enamel before removing deeper
decay
C) Apply caries indicating liquid and remove it till all stains are gone
D) Continue with our High speed handpiece with a #6 round bur |
|
Definition
B) Modifr our preparation by removing undermined enamel before removing deeper
decay |
|
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Term
21.In Class I amalgams, we want to start with a #34 diamond because:
A) The shape of the bur creates a smooth wall with convergence
B) It is a quick cutting bur useful for rough cutting
C) We can use a dry field with this bur |
|
Definition
| B) It is a quick cutting bur useful for rough cutting |
|
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Term
22.In Class I amalgams, the pulpal floor:
A) Must be deeper than 2.0mm from the walls
B) should be relatively smooth and parallel to a plane between the facial & lingual
cusps
C) should be cut into dentin and not have any enamel islands remaining
D) all of the above
E) none ofthe above |
|
Definition
B) should be relatively smooth and parallel to a plane between the facial & lingual
cusps |
|
|
Term
23.In Class I amalgams, the facial and lingual walls:
A) should be straight or convergent and smooth
B) should be straight or slightly divergent
C) The wall profile doesn't matter, as long as the caries is removed
D) Should have a rounded cavo-surface margin |
|
Definition
| A) should be straight or convergent and smooth |
|
|
Term
24.ln Class I amalgams, which teeth commonly have separate occlusal preparations
because of prominent oblique or transverse ridges?
A) Upper molars, lower molars
B) Upper first molar only
C) Lower second bicuspids, and upper first molars only
D) Upper molars and lower first bicuspids |
|
Definition
| D) Upper molars and lower first bicuspids |
|
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Term
26. Joe Milkduds, is a 28 yr old movie buff and he has decay on the occlusal surface of
#30. The dentist found decay in all the pits and grooves. Joe had unusually thick enamel.
After decay removal, lots of enamel remained on the pulpal floor except on the distal pit
which went close to the pulp horn. As his dentist you would:
A) Reduce the entire pulpal floor deeper to maintain a smooth and level floor and at
the same time remove all the decay
B) Leave the enamel alone, as long as the pulpal floor remained at least 2.0 mm in
depth
C) We must always go to Yzmm past the DEJ
D) If at the minimal 1.5 mm I would leave the enamel intact and remove only the
deeper part ofthe decay |
|
Definition
D) If at the minimal 1.5 mm I would leave the enamel intact and remove only the
deeper part ofthe decay |
|
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Term
27. The'buttress' or one of the most important parts of the tooth which contributes to its
overall strength (and therefore a tooth structure we want to conserve) is the:
A) Central groove
B) Triangular Ridge
C) Mesial & distal pit
D) Transparent ridge
E) Aproximal concave surface |
|
Definition
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|
Term
28. A #330 diamond bur is great for creating
A) Rounded internal line angles
B) Slightly converging facial and lingual walls
C) Smooth facial and lingual walls
D) All of the above |
|
Definition
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|
Term
29. As a general rule, if you are working on the patient's teeth on their left side, you want
to:
A) tilt the patient's head to the right side
B) keep the patient's head centered
C) work in the l2 O'clock position
D) Tilt your head to the left side |
|
Definition
| A) tilt the patient's head to the right side |
|
|
Term
31. When using our finger rest we want to:
A) use our ring finger
B) use firm pressure
C) place it on the same arch we are working on
D) place the finger rest on a solid surface such as the teeth or gingivae
E) All of the above |
|
Definition
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|
Term
32. When placing our rubber dam clamp, we orient the ring towards the distal of the tooth
we are clamping.
A) This statement is true
B) This statement is false |
|
Definition
| A) This statement is true |
|
|
Term
33. What could cause a rubber dam to leak?
A) Holes punched too far apart
B) Rubber Dam not stretched enough on the frame
C) Distal dam area not flossed down
D) Used a plastic frame instead of a metal one |
|
Definition
| C) Distal dam area not flossed down |
|
|
Term
34. After placing a rubber dam, your patient raises his hand and complains that saliva is
accumulating in the back of their throat. You should:
A) Continue the procedure by removing the rubber dam
B) Lower the patient's head and ask them to swallow and 'hang in there'
C) Raise the patient's head and insert a suction device under the rubber dam
D) Cut a hole in the rubber dam to allow the patient to breathe |
|
Definition
| C) Raise the patient's head and insert a suction device under the rubber dam |
|
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Term
35. What are causes of Pulpal Inflammation?
A. dessication
B. MMPs
C. Bur friction
D. All of the above |
|
Definition
|
|
Term
36. All enamel rods/prisms are at what angle to the dentinal surface?
A.60"
B.45'
c. 90'
D. 300 |
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Definition
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|
Term
37. What percentage of dentin is organic material?
A.96%
B. 1%
c.75%
D. 5%
E.20% |
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Definition
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|
Term
38. Which of the following are true regarding sclerotic dentin?
A. Deposited during normal aging
B. Dentin that is more mineralized vs. normal dentin
C. Deposited in response to trauma
D. Dentin that is cariously involved
E. Dentin that is 5 times harder than enamel |
|
Definition
| B. Dentin that is more mineralized vs. normal dentin |
|
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Term
39. A diamond bur causes more damage to enamel versus a 24-fluted carbide bur.
A. True
B. False |
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Definition
|
|
Term
40. You should take the following into consideration when drilling on a tooth:
l-Direction
2-Force
3-Coolants
4-Duration
5-Whatever Dr. Dela Rama says |
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Definition
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Term
50. PMMA is brittle at room temperature primarily because of:
a. high molecular weight
b. glass transition temperature significantly higher than room temperature
c. crosslinking
d. high molecular weight
e. all of the above |
|
Definition
| b. glass transition temperature significantly higher than room temperature |
|
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Term
52. The disadvantages of using PMMA as a direct filling material include:
a. shrinkage, low bond strength, leakage, yellow with age, high wear, low strength
b. shrinkage, low strength, less wear
c. high strength, good bond strength, no leakage
d. leakage, no discoloration, less wear and good strength
e. all of the above |
|
Definition
| a. shrinkage, low bond strength, leakage, yellow with age, high wear, low strength |
|
|
Term
| If the Isthmus is narrower, what does it allow for? |
|
Definition
|
|
Term
| What teeth do you have to do a separate prep for for amalgam? |
|
Definition
| Mandibular 1st Premolar and Maxillary Molars |
|
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Term
| What dictates depth in a prep? |
|
Definition
|
|
Term
| What do you use when taking out decay near the pulp? |
|
Definition
| You use a spoon excavator |
|
|
Term
| What is a Class 1 Occlusion |
|
Definition
1. Pits and fissures of occlusal surfaces of posterior teeth (Premolars & molars)
2. Pits in the occlusal 2/3 of facial & lingual surfaces of molars
3. Lingual pits of maxillary incisors in the incisal 2/3 of tooth |
|
|
Term
| Eruption Dates for Maxillary/Mandibular Premolars |
|
Definition
Maxillary 1st: 10-11 yrs
Maxillary 2nd: 10-12 yrs
Mandibular 1st: 10-12 yrs
Mandibular 2nd: 11-12 years |
|
|
Term
| Eruption Dates for Maxillary/Mandibular Molars |
|
Definition
Maxillary 1st: 6 yrs
Maxillary 2nd: 12-13 yrs
Mandibular 1st: 6-7 yrs
Mandibular 2nd: 11-13 yrs |
|
|
Term
| What three cusps of the maxillary first molar make up the trigon? |
|
Definition
| Everyone BUT the distolingual. So the mesiolingual, the mesiofacial and the distofacial all make up the trigon. |
|
|
Term
| What is the difference between flowable composition and paste composite? |
|
Definition
Flowable Composites are easier to get in tight areas, but have high polymerization shrinkage and poor wear resistance
Paste Composite is applied to outermost areas of prep - it shrinks less, has better wear properties and has less stains and lasts longer |
|
|
Term
|
Definition
| Tertiary Dentin is deposited in response to trauma, and the pulp horn will recede |
|
|
Term
| What is sclerotic dentin? |
|
Definition
| Sclerotic Dentin is hyper-mineralized dentin, it can be due to chronic arrested decay or chronic exposed roots. It will be darker non-carious, and it won't be necessary to remove. It will be more mineralized, harder, and more difficult to bond with composites |
|
|
Term
| Which cusp occludes in the distal fossa of tooth #4? |
|
Definition
| No cusp occludes in this fossa |
|
|
Term
| When restoring class I restorations on posterior teeth we want our bur to to angulated |
|
Definition
| Perpendicular to the occlusal plane OR parallel to the long axis of the tooth |
|
|
Term
| What is the functional cusp of the maxillary first premolar? |
|
Definition
|
|
Term
| Which is the functional cusp of #29? |
|
Definition
|
|
Term
| When a mandibular 1st premolar is viewed from proximal, what is approximate angle between the occlusal table and the long axis of the tooth? |
|
Definition
|
|
Term
Which of the following teeth have a very small lingual cusp?
Mandibular 2nd premolar
Mandibular 1st premolar |
|
Definition
|
|
Term
Which of the following cusps is a functional cusp?
"MB of maxillary 1st molar
DL of mandibular 2nd molar
DB of mandibular 1st molar
Cusp of carabelli" |
|
Definition
| distobuccal cusp of mandibular 1st molar |
|
|
Term
| How should you orient your handpiece for a Class I on a posterior tooth? |
|
Definition
| Perpendicular to the occlusal plane/parallel to the long axis of the tooth |
|
|
Term
| How many cusps does the mandibular primary 2nd molar have? |
|
Definition
|
|
Term
| T/F: Does the maxillary 1st molar have a medial concavity? |
|
Definition
|
|
Term
| Which of the following characteristics is not consistent with maxillary premolars? |
|
Definition
| Crown is of equal dimension faciolingually as mesiodistally |
|
|
Term
| Does Maxillary 1st premolar have a mesiomarginal groove? |
|
Definition
|
|
Term
| Which has more kaolin, household porcelain or dental porcelain? |
|
Definition
|
|
Term
| What is an addition vs condensation reaction? |
|
Definition
Condensation reaction – combination of 2 or more molecules resulting in elimination of water or other
simple molecules to form long chain molecule
Addition reaction – acrylics – simple molecules are linked together to form long chains |
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