DARBY FINAL EXAM QUESTIONS
AND 100% CORRECT ANSWERS
Prior to performing periodontal procedures, you consult your periodontal textbook and
learn that the causative agents related to her condition are MOST likely....
A.Prevotella intermedia, spirochetes, and fusiform bacteria.
B.Porphyromonas, spirochetes and fusiform bacteria.
C.Simonsiella and spirochetes.
D.Treponema and spirochetes.
A.Prevotella intermedia, spirochetes, and fusiform bacteria.
Which of the following are early bacterial colonizers of the tooth surfaces?
A.Gram-positive rods
B.Gram-negative cocci
C.Gram-positive cocci
D.Filamentous bacteria
C.Gram-positive cocci
A client who reports taking isoniazid, rifampin, and pyrazinamide is MOST likely
being treated for which of the following conditions? A.Epilepsy
,B.Anaphylaxis
C.Tuberculosis
D.Peptic ulcers
C.Tuberculosis
A prescription for daily use of neutral 1.1% NaF fluoride gel should be given to Mrs.
Hernandez to help remineralize early lesions.
This fluoride gel will also help prevent new carious lesions.
A.Both statements are TRUE.
B.Both statements are FALSE.
C.The first statement is TRUE, the second is FALSE.
D.The first statement is FALSE, the second is TRUE.
A.Both statements are TRUE.
Which property of CAD/CAM restorations is most significant to plaque biofilm
accumulation?
A.Thermal expansion
B.Esthetics
C.Resistance
D.Fatigue
C.Resistance
The physical property of resistance applies to numerous aspects of CAD/CAM restorations. They
have good resistance to plaque biofilm adsorption or retention. Other beneficial properties of
resistance possessed by CAD/CAM restorations include resistance to toothbrush abrasion and
wear resistance. Another beneficial property of CAD/CAM restorations is that they have limited
fatigue resistance (prevents iniatition and progression of cracks). Thermal expansion applies to
the ability of a practitioner to achieve a well-matched CAD/CAM restoration. Likewise, the
physical property of esthetics applies to the ability to achieve good shade matching. CAD/CAM
restorations have a limited degree of fatigue resistance caused by their brittleness.
During acidulated phosphate fluoride (APF) therapy, a lubricant should be used to
protect the surfaces of all of the following restorations EXCEPT one. Which one is the
,EXCEPTION?
A.Porcelain veneers
B.CAD/CAM ceramic
C.Hybrid composite
D.Amalgam
D.Amalgam
While dental amalgam is not easily etched, dissolved, or otherwise altered by acids in APF, this
is not true of many tooth colored restorative materials. Acidulated phosphate fluoride (APF) can
etch porcelain veneers as well as the inlay cement used with CAD/CAM ceramic restorations.
Hybrid composite fillers can be superficially dissolved by APF gel and foam treatments.
A 49-year-old white female client reports intermittent sensitivity in her right mandibular
first molar. The tooth has no restoration, and the vitalometer test results are positive
(indicating a nonvital pulp) for pathology. A current radiograph shows a radiopaque area
at the apex of the distal root of this tooth. This condition has been diagnosed as
condensing osteitis. Which of the following is MOST likely responsible for this condition?
A.Occlusal trauma
B.Odontoma
C.Periapical cemento-osseous dysplasia
D.Periapical abcess
A.Occlusal trauma
Condensing osteitis, or root resorption, is a factor in occlusal trauma that appears
radiographically radiopaque and is associated with endo-periapical lesions. Also indicative of
occlusal trauma as a cause for condensing osteitis, her exam results were positive for pathology
and radiographically appear radiopaque. This pathology is not an odontoma, which is an
odontogenic tumor composed of tooth structures, enamel, dentin, and pulp. While an odontoma
is radiopaque, as is condensing osteitis, an odontoma is surrounded by a radiolucent halo.
Neither is this lesion a periapical cemento-ossdeous dysplasia (cementoma), a condition that is
associated with vital teeth that are asymptomatic. Cementoma most frequently occurs in the
mandibular anterior region and occurs in middle aged Africa American women 70% of the time.
, Although periapical abcesses also occur at the root apex, radiographically they typically
appear radiolucent.
Osmosis, the diffusion of water through a selectively permeable membrane, is a form of
active transport because active transport methods move substances against a concentration
gradient and requires the expenditure of metabolic energy. A.Both the statement and
reason are correct and related.
B.Both the statement and 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.
D.The statement is NOT correct, but the reason is correct.
The causative agent of the Hepatitis A virus (HAV) is
A.single-stranded RNA.
B.double-stranded RNA.
C.single-stranded DNA.
D.double-stranded DNA.
A.single-stranded RNA.
Many older adult patients who present with large cavities have only minimal pain
because a decline in metabolism decreases pain receptors in the dental pulp. A.Both the
statement and reason are correct and related.
B.Both the statement and 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.
C.The statement is correct, but the reason is NOT.
A pediatric journal article analyzing dental caries in children under 5 years of age states
that the standard deviation for the findings is ±20 in a sample of 100 children. What
does the reported standard deviation MOST likely indicate? A.The distribution of scores
was clustered around the mean.
B.The distribution of scores was dispersed widely around the mean.
AND 100% CORRECT ANSWERS
Prior to performing periodontal procedures, you consult your periodontal textbook and
learn that the causative agents related to her condition are MOST likely....
A.Prevotella intermedia, spirochetes, and fusiform bacteria.
B.Porphyromonas, spirochetes and fusiform bacteria.
C.Simonsiella and spirochetes.
D.Treponema and spirochetes.
A.Prevotella intermedia, spirochetes, and fusiform bacteria.
Which of the following are early bacterial colonizers of the tooth surfaces?
A.Gram-positive rods
B.Gram-negative cocci
C.Gram-positive cocci
D.Filamentous bacteria
C.Gram-positive cocci
A client who reports taking isoniazid, rifampin, and pyrazinamide is MOST likely
being treated for which of the following conditions? A.Epilepsy
,B.Anaphylaxis
C.Tuberculosis
D.Peptic ulcers
C.Tuberculosis
A prescription for daily use of neutral 1.1% NaF fluoride gel should be given to Mrs.
Hernandez to help remineralize early lesions.
This fluoride gel will also help prevent new carious lesions.
A.Both statements are TRUE.
B.Both statements are FALSE.
C.The first statement is TRUE, the second is FALSE.
D.The first statement is FALSE, the second is TRUE.
A.Both statements are TRUE.
Which property of CAD/CAM restorations is most significant to plaque biofilm
accumulation?
A.Thermal expansion
B.Esthetics
C.Resistance
D.Fatigue
C.Resistance
The physical property of resistance applies to numerous aspects of CAD/CAM restorations. They
have good resistance to plaque biofilm adsorption or retention. Other beneficial properties of
resistance possessed by CAD/CAM restorations include resistance to toothbrush abrasion and
wear resistance. Another beneficial property of CAD/CAM restorations is that they have limited
fatigue resistance (prevents iniatition and progression of cracks). Thermal expansion applies to
the ability of a practitioner to achieve a well-matched CAD/CAM restoration. Likewise, the
physical property of esthetics applies to the ability to achieve good shade matching. CAD/CAM
restorations have a limited degree of fatigue resistance caused by their brittleness.
During acidulated phosphate fluoride (APF) therapy, a lubricant should be used to
protect the surfaces of all of the following restorations EXCEPT one. Which one is the
,EXCEPTION?
A.Porcelain veneers
B.CAD/CAM ceramic
C.Hybrid composite
D.Amalgam
D.Amalgam
While dental amalgam is not easily etched, dissolved, or otherwise altered by acids in APF, this
is not true of many tooth colored restorative materials. Acidulated phosphate fluoride (APF) can
etch porcelain veneers as well as the inlay cement used with CAD/CAM ceramic restorations.
Hybrid composite fillers can be superficially dissolved by APF gel and foam treatments.
A 49-year-old white female client reports intermittent sensitivity in her right mandibular
first molar. The tooth has no restoration, and the vitalometer test results are positive
(indicating a nonvital pulp) for pathology. A current radiograph shows a radiopaque area
at the apex of the distal root of this tooth. This condition has been diagnosed as
condensing osteitis. Which of the following is MOST likely responsible for this condition?
A.Occlusal trauma
B.Odontoma
C.Periapical cemento-osseous dysplasia
D.Periapical abcess
A.Occlusal trauma
Condensing osteitis, or root resorption, is a factor in occlusal trauma that appears
radiographically radiopaque and is associated with endo-periapical lesions. Also indicative of
occlusal trauma as a cause for condensing osteitis, her exam results were positive for pathology
and radiographically appear radiopaque. This pathology is not an odontoma, which is an
odontogenic tumor composed of tooth structures, enamel, dentin, and pulp. While an odontoma
is radiopaque, as is condensing osteitis, an odontoma is surrounded by a radiolucent halo.
Neither is this lesion a periapical cemento-ossdeous dysplasia (cementoma), a condition that is
associated with vital teeth that are asymptomatic. Cementoma most frequently occurs in the
mandibular anterior region and occurs in middle aged Africa American women 70% of the time.
, Although periapical abcesses also occur at the root apex, radiographically they typically
appear radiolucent.
Osmosis, the diffusion of water through a selectively permeable membrane, is a form of
active transport because active transport methods move substances against a concentration
gradient and requires the expenditure of metabolic energy. A.Both the statement and
reason are correct and related.
B.Both the statement and 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.
D.The statement is NOT correct, but the reason is correct.
The causative agent of the Hepatitis A virus (HAV) is
A.single-stranded RNA.
B.double-stranded RNA.
C.single-stranded DNA.
D.double-stranded DNA.
A.single-stranded RNA.
Many older adult patients who present with large cavities have only minimal pain
because a decline in metabolism decreases pain receptors in the dental pulp. A.Both the
statement and reason are correct and related.
B.Both the statement and 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.
C.The statement is correct, but the reason is NOT.
A pediatric journal article analyzing dental caries in children under 5 years of age states
that the standard deviation for the findings is ±20 in a sample of 100 children. What
does the reported standard deviation MOST likely indicate? A.The distribution of scores
was clustered around the mean.
B.The distribution of scores was dispersed widely around the mean.
