DARBY 2025 EXAM QUESTIONS AND 100%
CORRECT ANSWERS
A high school student in your target group has questions about an advertisement for a new
mouthrinse in a health-related journal. Accompanying the advertisement is a graph
indicating a baseline mean plaque score of 3.1. After 21 days of normal toothbrushing and
the use of the mouthrinse being advertised, data analysis indicated the mean plaque score
was 1.5. No other commentary is offered about the study. In reviewing the information in
the advertisement, which of the following can be deduced?
A.There was a statistically significant reduction in plaque scores
B.There appears to be a clinically evident reduction in plaque scores
C.There is both a clinically and a statistically significant reduction in mean plaque scores
D.There is neither a clinical nor a statistical significance in the plaque scores
B.There appears to be a clinically evident reduction in plaque scores
Six hospitals and walk-in clinics report the following numbers of emergency department
visits for sports-related injuries for children and adolescents aged 18 and younger: 24, 28,
42, 26, 35, and 30. What is the median number of emergency department visits reported?
A.22
B.29
C.58
D.Not computable
B.29
,Sally Westerly, who is blind, brings her seeing-eye dog to her dental hygiene appointment.
The BEST strategy for the dental hygienist when interacting with the dog is to provide
treats because this will distract the dog and ensure a more relaxed environment.
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.NEITHER the statement NOR reason is correct.
D.NEITHER the statement NOR reason is correct.
A contraction in which the tone or tension within a muscle remains the same while the
length of the muscle changes is referred to as
A.isotonic.
B.isometric.
C.stretch reflex.
D.syncytium.
A.isotonic
Isotonic contraction refers to contraction in which the tone or tension within a muscle remains
the same as the length of the muscle changes. Isotonic means 'same tension". Conversely, during
isometric a contraction the muscular length remains the same while muscle tension increases.
Isometric means "same length". Stretch reflex refers to the degree to which the load imposed on
a muscle influences the strength of skeletal contraction. Synctium refers to a continuous,
electrically coupled mass that is important for coordinating muscle contractions.
,All of the following would improve the visual appearance of the radiographic image,
EXCEPT one. Which one is the EXCEPTION?
A.Large focal spot
B.Long focal spot to object distance
C.Short object to film distance
D.Parallel object and film relationship
A.Large focal spot
Which of the following will not relieve dentinal hypersensitivity in the cervical area of a
tooth?
A.Application of phosphoric acid
B.Acidulated phosphate fluoride (APF)
C.Sealant coverage of open tubules
D.Stimulation of secondary dentin
B.Acidulated phosphate fluoride (APF)
Which of the following describes a dental implant that is placed on the surface of the bone
beneath the periosteum?
A.Periosseous
B.Endosseous
C.Transosteal
D.Subperiosteal
D.Subperiosteal
, Which of the following nonsurgical periodontal interventions targets the host's response to
disease rather than the host's bacterial load as a way to reduce destructive collagenase
activity?
A.Systemic antibiotic therapy such as tetracycline or amoxicillin
B.Local chemotherapy such as 0.12% chlorhexidine mouthrinse
C.Systemic subantimicrobial-dose doxycycline
D.Meticulous oral hygiene
C.Systemic subantimicrobial-dose doxycycline
A form of systemic therapy, subantimicrobial-dose doxycycline (low dose) has been approved by
the FDA for treatment of periodontal disease. This subantimicrobial approach inhibits
periodontal disease progression by reducing destructive effects of chronic inflammation.
Subantimicrobial-dose doxycycline will reduce collagenase activity and hence work directly on
the host's response to inflammation. Used in this manner subantimicrobial-dose doxycycline is
considered a host-modulating drug where the host response is the target. Alternatively, systemic
antibiotics target the bacterial load that cause the disease. Local chemotherapeutic mouthrinses
like 0.12% chlorhexidine target supragingival plaque and gingivitis. To be advocated regardless
of the therapy proposed, oral hygiene measures attempt to control the bacterial load.
Your patient is taking Flagyl (metronidazole) and requires a mouthrinse to help control
dental plaque and gingivitis. Which of the following should be recommended?
A.A rinse with alcohol
B.The patient should choose one
C.A rinse without alcohol
D.Mouthrinse should not be recommended
CORRECT ANSWERS
A high school student in your target group has questions about an advertisement for a new
mouthrinse in a health-related journal. Accompanying the advertisement is a graph
indicating a baseline mean plaque score of 3.1. After 21 days of normal toothbrushing and
the use of the mouthrinse being advertised, data analysis indicated the mean plaque score
was 1.5. No other commentary is offered about the study. In reviewing the information in
the advertisement, which of the following can be deduced?
A.There was a statistically significant reduction in plaque scores
B.There appears to be a clinically evident reduction in plaque scores
C.There is both a clinically and a statistically significant reduction in mean plaque scores
D.There is neither a clinical nor a statistical significance in the plaque scores
B.There appears to be a clinically evident reduction in plaque scores
Six hospitals and walk-in clinics report the following numbers of emergency department
visits for sports-related injuries for children and adolescents aged 18 and younger: 24, 28,
42, 26, 35, and 30. What is the median number of emergency department visits reported?
A.22
B.29
C.58
D.Not computable
B.29
,Sally Westerly, who is blind, brings her seeing-eye dog to her dental hygiene appointment.
The BEST strategy for the dental hygienist when interacting with the dog is to provide
treats because this will distract the dog and ensure a more relaxed environment.
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.NEITHER the statement NOR reason is correct.
D.NEITHER the statement NOR reason is correct.
A contraction in which the tone or tension within a muscle remains the same while the
length of the muscle changes is referred to as
A.isotonic.
B.isometric.
C.stretch reflex.
D.syncytium.
A.isotonic
Isotonic contraction refers to contraction in which the tone or tension within a muscle remains
the same as the length of the muscle changes. Isotonic means 'same tension". Conversely, during
isometric a contraction the muscular length remains the same while muscle tension increases.
Isometric means "same length". Stretch reflex refers to the degree to which the load imposed on
a muscle influences the strength of skeletal contraction. Synctium refers to a continuous,
electrically coupled mass that is important for coordinating muscle contractions.
,All of the following would improve the visual appearance of the radiographic image,
EXCEPT one. Which one is the EXCEPTION?
A.Large focal spot
B.Long focal spot to object distance
C.Short object to film distance
D.Parallel object and film relationship
A.Large focal spot
Which of the following will not relieve dentinal hypersensitivity in the cervical area of a
tooth?
A.Application of phosphoric acid
B.Acidulated phosphate fluoride (APF)
C.Sealant coverage of open tubules
D.Stimulation of secondary dentin
B.Acidulated phosphate fluoride (APF)
Which of the following describes a dental implant that is placed on the surface of the bone
beneath the periosteum?
A.Periosseous
B.Endosseous
C.Transosteal
D.Subperiosteal
D.Subperiosteal
, Which of the following nonsurgical periodontal interventions targets the host's response to
disease rather than the host's bacterial load as a way to reduce destructive collagenase
activity?
A.Systemic antibiotic therapy such as tetracycline or amoxicillin
B.Local chemotherapy such as 0.12% chlorhexidine mouthrinse
C.Systemic subantimicrobial-dose doxycycline
D.Meticulous oral hygiene
C.Systemic subantimicrobial-dose doxycycline
A form of systemic therapy, subantimicrobial-dose doxycycline (low dose) has been approved by
the FDA for treatment of periodontal disease. This subantimicrobial approach inhibits
periodontal disease progression by reducing destructive effects of chronic inflammation.
Subantimicrobial-dose doxycycline will reduce collagenase activity and hence work directly on
the host's response to inflammation. Used in this manner subantimicrobial-dose doxycycline is
considered a host-modulating drug where the host response is the target. Alternatively, systemic
antibiotics target the bacterial load that cause the disease. Local chemotherapeutic mouthrinses
like 0.12% chlorhexidine target supragingival plaque and gingivitis. To be advocated regardless
of the therapy proposed, oral hygiene measures attempt to control the bacterial load.
Your patient is taking Flagyl (metronidazole) and requires a mouthrinse to help control
dental plaque and gingivitis. Which of the following should be recommended?
A.A rinse with alcohol
B.The patient should choose one
C.A rinse without alcohol
D.Mouthrinse should not be recommended
