First Aid NBDE: Operative Dentistry and Prosthodontics
UPDATED ACTUAL Questions and CORRECT Answers
The ARCON design has condylar elements Articulators are further distinguished by design.
in the lower member What is the advantage an ARCON (ARticulator, CONdyle) design has over a non-
ARCON
design?
A. The ARCON design has condylar elements
in the upper member
B. The ARCON design has condylar elements
in the lower member
C. The non-ARCON design has the condylar
inclination of the mechanical fossae at a
fixed angle to the maxillary occlusal plane
D. The ARCON design has the condylar incli-
nation of the mechanical fossae at a variable
angle to the maxillary occlusal plane as the
articulator opens
E. None of the above
Full crown coverage A 13-year-old female patient presents with yellow, pitted enamel on all permanent
teeth. Her mother reports that all of the patient's baby teeth had a similar
appearance. The patient has excellent hygiene and no caries but is concerned
about her appearance. What is the best treatment to address this patient's chief
complaint?
A. Composite bonding
B. Facial veneers
C. Full crown coverage
D. No dental treatment, but refer to a clinic for
treatment of an eating disorder
E. No treatment is necessary
Extract the tooth and replace with three-unit A 27-year-old female presents with pain on the
fixed partial denture lower right side in the area of the second premolar. The HIV-positive patient has
smoked two packs of cigarettes per day for 15 years and is not interested in
quitting smoking. She has multiple amalgam and composite restorations in all
quadrants. Clinically, the tooth resembles a primary mandibular second molar and
has a large occlusal composite with open margins. Radiographic examination
reveals widely divergent mesial and distal roots and radiolucency in the furcation.
What is the most appropriate treatment for this patient?
A. Extract the tooth and place an implant
B. Root canal therapy, post and core, full coverage crown
C. Removal of existing composite, direct pulp
cap, and composite restoration
D. Extract the tooth and replace with three-unit
fixed partial denture
E. No treatment is necessary
,Fully or partially disappears when wet A 25-year-old male patient presents to your office for a routine checkup. He has
no significant medical history. Dental history includes orthodontic treatment 10
years ago and several occlusal amalgam restorations that which are 15- to 17-
years old. You notice white spots on the facial surfaces
of teeth #8 and #9. Which of the following diagnostic tools would best aid in
differentiating the white lesions as incipient caries versus hereditary enamel
hypocalcification?
A. Radiograph
B. Fully or partially disappears when wet
C. Caries detector
D. Transillumination
E. Sharp explorer
V shape in the enamel with the apex toward As caries progresses from enamel to dentin
the DEJ and V shape in dentin with apex and toward the pulp interproximally, the radiographic appearance resembles
toward the pulp which of the following?
A. V shape in the enamel with the apex toward
the DEJ and V shape in dentin with apex
toward the pulp
B. V shape in enamel with apex toward the proximal surface and V shape in dentin
with the
apex toward the pulp, resulting in a diamond
appearance
C. V shape in enamel with the apex toward the
DEJ and V shape in dentin with the apex toward the DEJ, resulting in a bowtie
appearance
D. V shape in enamel with the apex toward the
proximal surface and V shape in dentin with
the apex toward the DEJ
, Turbid dentin In a carious lesion in which caries has extended
into dentin, which of the following zones con-
tains infected dentin and is not capable of rem-
ineralization?
A. Normal dentin
B. Subtransparent dentin
C. Transparent dentin
D. Turbid dentin
E. Eburnated dentin
Swallowing Which of the following is NOT a parafunctional
movement?
A. Swallowing
B. Bruxism
C. Nail biting
D. Clenching
MO amalgam A 28-year-old asymptomatic male patient
presents with active caries and active periodontal
disease. What is the best treatment for a posterior
endodontically treated premolar?
A. Veneer
B. Metal-ceramic crown
C. MO amalgam
D. Extraction
E. Fixed partial denture
F. Partial-coverage restoration
Down, forward, and medially A patient moves his mandible in a right lateral
excursion. To which direction will the nonwork-
ing condyle move?
A. Down, forward, and medially
B. Down, forward, and laterally
C. Up, back, and down
D. Up, back, and out
E. None of the above
Excessive vertical dimension of occlusion At the wax try-in, the maxillary plane appears to
be correct, yet when the patient closes lightly in
centric relation, the mandibular teeth appear to
show too much. The patient's lips do not contact
unless the patient forces them to do so. What is
the most likely error that has occurred?
A. Excessive vertical dimension of occlusion
B. Inaccurate face-bow transfer
C. Over closed vertical dimension of occlusion
D. Excessive amount of freeway space
UPDATED ACTUAL Questions and CORRECT Answers
The ARCON design has condylar elements Articulators are further distinguished by design.
in the lower member What is the advantage an ARCON (ARticulator, CONdyle) design has over a non-
ARCON
design?
A. The ARCON design has condylar elements
in the upper member
B. The ARCON design has condylar elements
in the lower member
C. The non-ARCON design has the condylar
inclination of the mechanical fossae at a
fixed angle to the maxillary occlusal plane
D. The ARCON design has the condylar incli-
nation of the mechanical fossae at a variable
angle to the maxillary occlusal plane as the
articulator opens
E. None of the above
Full crown coverage A 13-year-old female patient presents with yellow, pitted enamel on all permanent
teeth. Her mother reports that all of the patient's baby teeth had a similar
appearance. The patient has excellent hygiene and no caries but is concerned
about her appearance. What is the best treatment to address this patient's chief
complaint?
A. Composite bonding
B. Facial veneers
C. Full crown coverage
D. No dental treatment, but refer to a clinic for
treatment of an eating disorder
E. No treatment is necessary
Extract the tooth and replace with three-unit A 27-year-old female presents with pain on the
fixed partial denture lower right side in the area of the second premolar. The HIV-positive patient has
smoked two packs of cigarettes per day for 15 years and is not interested in
quitting smoking. She has multiple amalgam and composite restorations in all
quadrants. Clinically, the tooth resembles a primary mandibular second molar and
has a large occlusal composite with open margins. Radiographic examination
reveals widely divergent mesial and distal roots and radiolucency in the furcation.
What is the most appropriate treatment for this patient?
A. Extract the tooth and place an implant
B. Root canal therapy, post and core, full coverage crown
C. Removal of existing composite, direct pulp
cap, and composite restoration
D. Extract the tooth and replace with three-unit
fixed partial denture
E. No treatment is necessary
,Fully or partially disappears when wet A 25-year-old male patient presents to your office for a routine checkup. He has
no significant medical history. Dental history includes orthodontic treatment 10
years ago and several occlusal amalgam restorations that which are 15- to 17-
years old. You notice white spots on the facial surfaces
of teeth #8 and #9. Which of the following diagnostic tools would best aid in
differentiating the white lesions as incipient caries versus hereditary enamel
hypocalcification?
A. Radiograph
B. Fully or partially disappears when wet
C. Caries detector
D. Transillumination
E. Sharp explorer
V shape in the enamel with the apex toward As caries progresses from enamel to dentin
the DEJ and V shape in dentin with apex and toward the pulp interproximally, the radiographic appearance resembles
toward the pulp which of the following?
A. V shape in the enamel with the apex toward
the DEJ and V shape in dentin with apex
toward the pulp
B. V shape in enamel with apex toward the proximal surface and V shape in dentin
with the
apex toward the pulp, resulting in a diamond
appearance
C. V shape in enamel with the apex toward the
DEJ and V shape in dentin with the apex toward the DEJ, resulting in a bowtie
appearance
D. V shape in enamel with the apex toward the
proximal surface and V shape in dentin with
the apex toward the DEJ
, Turbid dentin In a carious lesion in which caries has extended
into dentin, which of the following zones con-
tains infected dentin and is not capable of rem-
ineralization?
A. Normal dentin
B. Subtransparent dentin
C. Transparent dentin
D. Turbid dentin
E. Eburnated dentin
Swallowing Which of the following is NOT a parafunctional
movement?
A. Swallowing
B. Bruxism
C. Nail biting
D. Clenching
MO amalgam A 28-year-old asymptomatic male patient
presents with active caries and active periodontal
disease. What is the best treatment for a posterior
endodontically treated premolar?
A. Veneer
B. Metal-ceramic crown
C. MO amalgam
D. Extraction
E. Fixed partial denture
F. Partial-coverage restoration
Down, forward, and medially A patient moves his mandible in a right lateral
excursion. To which direction will the nonwork-
ing condyle move?
A. Down, forward, and medially
B. Down, forward, and laterally
C. Up, back, and down
D. Up, back, and out
E. None of the above
Excessive vertical dimension of occlusion At the wax try-in, the maxillary plane appears to
be correct, yet when the patient closes lightly in
centric relation, the mandibular teeth appear to
show too much. The patient's lips do not contact
unless the patient forces them to do so. What is
the most likely error that has occurred?
A. Excessive vertical dimension of occlusion
B. Inaccurate face-bow transfer
C. Over closed vertical dimension of occlusion
D. Excessive amount of freeway space
