OPD Board Certification Exam || Questions & Answers (Graded A+)
OPD Board Certification Exam || Questions & Answers (Graded A+)
The most retentive style of pins is the self-threaded pins because they are cemented into pinholes that are smaller than the pin itself.
a. Both statement and the ...
, OPD Board Certification Exam ||
Questions & Answers (Graded A+)
The most retentive style of pins is the self-threaded pins because they are cemented
into pinholes that are smaller than the pin itself.
a. Both statement and the reason are correct and related
b. Both the statement and the reason are correct but not related
c. The statement is correct, but the reason is not
d. The statement is not correct, but the reason is correct
e. Neither the statement nor the reason is correct - ANSWER - c. The statement is
correct, but the reason is not
- Although the pinhole is smaller than the selfthreaded pin, it is NOT cemente
Whenever the caries cone in enamel is larger or at least the same size as that in
dentin, it is called as
a. Residual caries
b. Recurrent caries
c. Forward caries
d. Backward caries - ANSWER - c. Forward caries
- Forward caries: The caries cone in enamel is larger or at least the same size as
that in dentin.
- Backward caries: when the spread of caries along the DEJ exceeds the caries in
the contiguous enamel, caries extends into this enamel from the junction.
Mecuroscopic expansion in dental amalgam occurs when:
a. Moisture contamination occurs during condensation of zinc containing amalgam
b. Moisture contamination occurs during trituration of zinc containing amalgam
c. Mercury released as a result of electrochemical corrosion re-reacts with AgSn
particle
d. Mercury released as a result of electrochemical corrosion re-reacts with Ag-Cu
particle. - ANSWER - c. Mercury released as a result of electrochemical corrosion re-
reacts with AgSn particle
- Electrochemical corrosion produces extrusion at margins (creep), during which
mercury from Sn-Hg rereacts with Ag-Sn particles and produces further called
Mercuroscopic expansion.
The tip diameter of a 245 bur used for conventional amalgam preparation is -
a. 2 mm
b. 0.8 mm
c. 0.3 mm
d. 4 mm - ANSWER - b. 0.8 mm
- A No. 245 bur has head length of 3mm and a tip diameter of 0.8mm. This is an
inverted cone bur. No. 330 is a smaller and pear shape version of the no. 245 bur,
used for the most conservative amalgam preparation.
,- No. 245 bur, which is an inverted one design with rounded corners
Which of the following is NOT considered when preparing cast metal restoration?
a. Wide intercuspal width; with 1/3 intercuspal distance
b. Buccal and lingual walls (proximal) converge occlusally
c. Less depth
d. Buccal and lingual proximal walls are parallel - ANSWER - b. Buccal and lingual
walls (proximal) converge occlusally
- Buccal and lingual walls (proximal) converge occlusally is for amalgam preparation.
- Buccal and lingual proximal walls are parallel for retention.
Indirect pulp capping procedure is felt to be more conservative and more likely to
yield favorable results than the direct method.
a. True
b. False - ANSWER - a. True
- This approach prefer not to traumatize the tooth by subjecting it to an exploratory
procedure to determine whether they are dealing with an actual pulp exposure or
only a deep carious lesion.
If a liner is not placed, either the acid used for etching or the resin, what will happen
to the pulp?
a. Irritation
b. necrosis
c. Irreversible
d. Reversible - ANSWER - a. Irritation
- Liners are purported to protect the pulp from the toxic effects of some dental
restorative materials. Liners are materials that are placed as thin coatings and their
main function is to provide a barrier against chemical irritation.
What class restoration is required when an accident or extensive caries destroys or
severely weakens the incisal angle?
a. Class IV
b. Class I
c. Class II
d. Class V - ANSWER - a. Class IV
- It is more difficult to decide to provide the desired mechanical retention when the
incisal portion of the tooth is lost. Class IV is the most conservative approach for
restorations that involves incisal angle. This restoration does not require great
removal of norma, tooth structure, as is required by full crown preparation.
Cavity varnish can be use in moderate and deep lesion. Corticosteroids can be use
in moderate and deep lesion.
A. First statement is correct, second statement is wrong
B. First statement is wrong, second statement is correct
C. Both statements are correct
, D. Both statements are wrong - ANSWER - B. First statement is wrong, second
statement is correct
Which of the following is required for greater strength in crowns?
a. Patients with bruxism or clenching habits.
b. Teeth with deep caries lesion
c. All of the above
d. None of the above - ANSWER - a. Patients with bruxism or clenching habits.
- Poor strength of crowns may fracture in patients with bruxism or reduced inter-
occlusal clearance
Following are common causes of failure of indirect restoration except:
a. poor preparation design/shape resulting in lack of retention and/or resistance form
b. insufficient reduction or lack of support/thickness for ceramic or composite
c. None of the above
d. failure to identify and/or correct occlusal problems - ANSWER - c. None of the
above
- Any tooth preparation for a crown should follow the appropriate biomechanical
principles
Gold can be used in thin sections and it is highly aesthetic. One millimeter of tooth
reduction is required occlusally, with the exception of the functional cusp bevel
where 1.5 mm is necessary.
a. First statement is FALSE and second statement is TRUE
b. First statement is TRUE and second statement is FALSE
c. BOTH statement are FALSE
d. BOTH statements TRUE - ANSWER - a. First statement is FALSE and second
statement is TRUE
- Gold can be used in thin sections but it is not highly aesthetic.
Porcelain laminate veneers may also be used to correct peg-shaped lateral incisors,
to close proximal spacing and diastemas, to repair (some) fractured incisal edges,
and to align labial surfaces of instanding teeth
a. TRUE
b. FALSE - ANSWER - a. TRUE
- Porcelain laminate veneers used to correct pegshaped lateral incisors, to close
proximal spacing and diastemas, to repair (some) fractured incisal edges, and to
align labial surfaces of instanding teeth.
Computer-aided design and manufacture techniques (CAD-CAM) are capable of
producing accurately fitting inlays from blocks of ceramic material. Composite inlays
are constructed from a variety of composite types and are 'supercured' using a
mixture of heat and pressure, and heat and light.
a. First statement is FALSE and second statement is TRUE
b. First statement is TRUE, and second statement is FALSE
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller conceptialresearchers. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
