NDAEB UPDATED 2026 EXAM SCRIPT QUESTIONS AND
ANSWERS GRADED A+
✔✔The matrix is used for anterior CR or GI restorations... - ✔✔Clear Plastic
✔✔Coronal Polishing is a technique used: - ✔✔- to remove plaque and stains from
coronal surfaces of the teeth
- before placement of dental sealants and orthodontic bands
- before placement of the dental dam and before acid etching
✔✔Patients at high risk for caries or with areas of thin demineralized enamel are
contraindications for coronal polishing - ✔✔True
✔✔Coronal polishing is the complete removal of calculus, debris, stains and plaque
from the teeth - ✔✔False
✔✔Exogenous stains are caused by an environmental source and are classified into
subdivisions, including which of the following: - ✔✔- Intrinsic stains
- Extrinsic stains
✔✔Extrinsic stains can be removed from the teeth by: - ✔✔- air-powder polishing
- rubber cup polishing
- bristle brushes
✔✔The ultrasonic scaler is needed for a coronal polish... - ✔✔False
✔✔Disclosing solution can be used for: - ✔✔- identifying areas of plaque
- evaluating the effectiveness of the polishing
✔✔Teeth with very small initial carious lesions may be sealed, and the bacteria will not
survive under a properly placed sealant - ✔✔True
✔✔Sealants have been proved an effective way to prevent the development of dental
caries and are indicated: - ✔✔- through the caries-active period (ages 6-15)
- for teeth with deep pits & fissures
- for some adults
✔✔Sealants shouldn't be used in which of the following situations: - ✔✔- obvious dental
decay or proximal surface decay
- primary teeth that will be lost soon
- poor patient cooperation in the dental chair or lack of pits & fissures
✔✔Sealants may vary in: - ✔✔- method of polymerization
- colour
,- whether they contain fillers
✔✔A general tip for sealant materials is to store them in a refrigerator: - ✔✔False
✔✔The first step in placing dental sealants is to: - ✔✔clean the surface
✔✔A sealant that is polymerized by chemical reactions is called: - ✔✔Self-Cured
✔✔Self-Cured sealant materials are supplied as a two-part system that includes: - ✔✔-
a base
- a catalyst
✔✔Dental sealants should be used as part of a preventative program that includes: -
✔✔- fluorides
- dietary considerations
- plaque control
✔✔Enamel that has been etched has the appearance of being: - ✔✔frosty
✔✔Antidepressants are often used in dentistry to alleviate or reduce anxiety and pain -
✔✔False
✔✔The agents that provide a temporary numbing effect on nerve endings located on
the surface of the oral mucosa are: - ✔✔Topical Anesthetics
✔✔Topical anesthesia is available in the form of: - ✔✔- ointments & liquids
- sprays
- patches
✔✔The most frequently used form of pain control used in dentistry is: - ✔✔Local
Anesthesia
✔✔______ is added to local anesthetic agent to slow down the intake of the agent and
increase the duration of action - ✔✔Vasoconstrictor
✔✔The ____ the ratio, the higher the percentage of vasoconstrictor in the anesthetic
agent - ✔✔Smaller
✔✔Patients with a hx of heart conditions such as angina, recent heart attack, recent
coronary artery bypass surgery, severe hypertension, and untreated or uncontrolled
CHF should always use a local anesthetic with a vasoconstrictor - ✔✔False
,✔✔The time from when the local anesthetic takes complete effect until the complete
reversal of anesthesia is the ___ of the anesthetic agent - ✔✔duration
✔✔A short-acting local anesthetic agent can last from: - ✔✔60 - 180 minutes
✔✔____ is achieved by injecting the anesthetic solution directly into the tissue at the
site of a dental procedure and is generally used on the maxillary arch - ✔✔infiltration
anesthesia
✔✔_____ is frequently used on the mandibular teeth and is injected near a major nerve
that numbs the entire area served by that nerve branch - ✔✔block anesthesia
✔✔The parts of the anesthetic syringe include: - ✔✔- thumb ring, finger grip, and finger
bar
- barrel and threaded tip
- harpoon and piston rod
✔✔The colour-coding system for anesthetic cartridges allows the practitioner to select
the correct anesthetic solution by distinguishing: - ✔✔- the correct ratio of solution
- the correct brand of solutions
✔✔The lengths of the needles used in dentistry are: - ✔✔1 and 15/8 inches
✔✔The gauge of the needle refers to the thickness of the needle; the larger the gauge,
the _______ the needle - ✔✔thinner
✔✔During the loading of an anesthetic syringe, the _____ is loaded first - ✔✔anesthetic
cartridge
✔✔To be certain the anesthetic solution is not injected into a blood vessel, the dentist: -
✔✔- uses an aspirating syringe
- always aspirates before depositing any solution
✔✔Anesthetic solutions are extremely effective for patients with a tooth or soft tissue
infection.. - ✔✔False
✔✔Parathesia, the condition in which numbness lasts after the effects of the local
anesthetic solutions should have worn off, may be caused by: - ✔✔- contaminated
anesthetic solution
- trauma/injury to nerve sheath during injection or surgery
- hemorrhage into/around nerve sheath
, ✔✔Nitrous Oxide/Oxygen analgesia use in dentistry dates back to 1844 and is also
known as: - ✔✔Inhalation sedation
✔✔An advantage of using nitrous oxide/oxygen is that it is relatively simple to
administer and easy to manage.. - ✔✔True
✔✔No absolute medical contraindications exist for N2O/O2 analgesia, but certain
conditions make it a poor choice for some patients - ✔✔True
✔✔Which of the following must be used to protect dental personnel from the
occupational risks of nitrous oxide by reducing the N2O released into the treatment
room? - ✔✔- Scavenger System
- Patient mask that fits well and doesn't leak
✔✔Nitrous oxide oxygen administration always begins and ends with: - ✔✔the patient
breathing 100% O2
✔✔In the dental office, sedatives may be used: - ✔✔- for a very nervous patient
- for a procedure that will be long or difficult
- for a mentally challenged patient
✔✔A DA can start, monitor and remove IV sedation for a dental patient.. - ✔✔False
✔✔General Anesthesia is most safely administered in: - ✔✔the hospital
✔✔The different levels of consciousness and unconsciousness are referred to as
stages of anesthesia; these stages include: - ✔✔- Stage 1 (anesthesia)
- Stage 2 (excitement)
- Stage 3 (general anesthesia)
✔✔Documentation records of pain & anxiety analgesia may include: - ✔✔- review of
patients health hx
- time anesthesia began & ended
- adverse events or pt complaints
✔✔The most important way to prevent a medical emergency is to be sure the pt has
_____ before tx has begun. - ✔✔completed/updated medical hx
✔✔Who is responsible for providing care if a medical emergency involving a patient
takes place in the dental office? - ✔✔- dentist
- DA
- office staff
ANSWERS GRADED A+
✔✔The matrix is used for anterior CR or GI restorations... - ✔✔Clear Plastic
✔✔Coronal Polishing is a technique used: - ✔✔- to remove plaque and stains from
coronal surfaces of the teeth
- before placement of dental sealants and orthodontic bands
- before placement of the dental dam and before acid etching
✔✔Patients at high risk for caries or with areas of thin demineralized enamel are
contraindications for coronal polishing - ✔✔True
✔✔Coronal polishing is the complete removal of calculus, debris, stains and plaque
from the teeth - ✔✔False
✔✔Exogenous stains are caused by an environmental source and are classified into
subdivisions, including which of the following: - ✔✔- Intrinsic stains
- Extrinsic stains
✔✔Extrinsic stains can be removed from the teeth by: - ✔✔- air-powder polishing
- rubber cup polishing
- bristle brushes
✔✔The ultrasonic scaler is needed for a coronal polish... - ✔✔False
✔✔Disclosing solution can be used for: - ✔✔- identifying areas of plaque
- evaluating the effectiveness of the polishing
✔✔Teeth with very small initial carious lesions may be sealed, and the bacteria will not
survive under a properly placed sealant - ✔✔True
✔✔Sealants have been proved an effective way to prevent the development of dental
caries and are indicated: - ✔✔- through the caries-active period (ages 6-15)
- for teeth with deep pits & fissures
- for some adults
✔✔Sealants shouldn't be used in which of the following situations: - ✔✔- obvious dental
decay or proximal surface decay
- primary teeth that will be lost soon
- poor patient cooperation in the dental chair or lack of pits & fissures
✔✔Sealants may vary in: - ✔✔- method of polymerization
- colour
,- whether they contain fillers
✔✔A general tip for sealant materials is to store them in a refrigerator: - ✔✔False
✔✔The first step in placing dental sealants is to: - ✔✔clean the surface
✔✔A sealant that is polymerized by chemical reactions is called: - ✔✔Self-Cured
✔✔Self-Cured sealant materials are supplied as a two-part system that includes: - ✔✔-
a base
- a catalyst
✔✔Dental sealants should be used as part of a preventative program that includes: -
✔✔- fluorides
- dietary considerations
- plaque control
✔✔Enamel that has been etched has the appearance of being: - ✔✔frosty
✔✔Antidepressants are often used in dentistry to alleviate or reduce anxiety and pain -
✔✔False
✔✔The agents that provide a temporary numbing effect on nerve endings located on
the surface of the oral mucosa are: - ✔✔Topical Anesthetics
✔✔Topical anesthesia is available in the form of: - ✔✔- ointments & liquids
- sprays
- patches
✔✔The most frequently used form of pain control used in dentistry is: - ✔✔Local
Anesthesia
✔✔______ is added to local anesthetic agent to slow down the intake of the agent and
increase the duration of action - ✔✔Vasoconstrictor
✔✔The ____ the ratio, the higher the percentage of vasoconstrictor in the anesthetic
agent - ✔✔Smaller
✔✔Patients with a hx of heart conditions such as angina, recent heart attack, recent
coronary artery bypass surgery, severe hypertension, and untreated or uncontrolled
CHF should always use a local anesthetic with a vasoconstrictor - ✔✔False
,✔✔The time from when the local anesthetic takes complete effect until the complete
reversal of anesthesia is the ___ of the anesthetic agent - ✔✔duration
✔✔A short-acting local anesthetic agent can last from: - ✔✔60 - 180 minutes
✔✔____ is achieved by injecting the anesthetic solution directly into the tissue at the
site of a dental procedure and is generally used on the maxillary arch - ✔✔infiltration
anesthesia
✔✔_____ is frequently used on the mandibular teeth and is injected near a major nerve
that numbs the entire area served by that nerve branch - ✔✔block anesthesia
✔✔The parts of the anesthetic syringe include: - ✔✔- thumb ring, finger grip, and finger
bar
- barrel and threaded tip
- harpoon and piston rod
✔✔The colour-coding system for anesthetic cartridges allows the practitioner to select
the correct anesthetic solution by distinguishing: - ✔✔- the correct ratio of solution
- the correct brand of solutions
✔✔The lengths of the needles used in dentistry are: - ✔✔1 and 15/8 inches
✔✔The gauge of the needle refers to the thickness of the needle; the larger the gauge,
the _______ the needle - ✔✔thinner
✔✔During the loading of an anesthetic syringe, the _____ is loaded first - ✔✔anesthetic
cartridge
✔✔To be certain the anesthetic solution is not injected into a blood vessel, the dentist: -
✔✔- uses an aspirating syringe
- always aspirates before depositing any solution
✔✔Anesthetic solutions are extremely effective for patients with a tooth or soft tissue
infection.. - ✔✔False
✔✔Parathesia, the condition in which numbness lasts after the effects of the local
anesthetic solutions should have worn off, may be caused by: - ✔✔- contaminated
anesthetic solution
- trauma/injury to nerve sheath during injection or surgery
- hemorrhage into/around nerve sheath
, ✔✔Nitrous Oxide/Oxygen analgesia use in dentistry dates back to 1844 and is also
known as: - ✔✔Inhalation sedation
✔✔An advantage of using nitrous oxide/oxygen is that it is relatively simple to
administer and easy to manage.. - ✔✔True
✔✔No absolute medical contraindications exist for N2O/O2 analgesia, but certain
conditions make it a poor choice for some patients - ✔✔True
✔✔Which of the following must be used to protect dental personnel from the
occupational risks of nitrous oxide by reducing the N2O released into the treatment
room? - ✔✔- Scavenger System
- Patient mask that fits well and doesn't leak
✔✔Nitrous oxide oxygen administration always begins and ends with: - ✔✔the patient
breathing 100% O2
✔✔In the dental office, sedatives may be used: - ✔✔- for a very nervous patient
- for a procedure that will be long or difficult
- for a mentally challenged patient
✔✔A DA can start, monitor and remove IV sedation for a dental patient.. - ✔✔False
✔✔General Anesthesia is most safely administered in: - ✔✔the hospital
✔✔The different levels of consciousness and unconsciousness are referred to as
stages of anesthesia; these stages include: - ✔✔- Stage 1 (anesthesia)
- Stage 2 (excitement)
- Stage 3 (general anesthesia)
✔✔Documentation records of pain & anxiety analgesia may include: - ✔✔- review of
patients health hx
- time anesthesia began & ended
- adverse events or pt complaints
✔✔The most important way to prevent a medical emergency is to be sure the pt has
_____ before tx has begun. - ✔✔completed/updated medical hx
✔✔Who is responsible for providing care if a medical emergency involving a patient
takes place in the dental office? - ✔✔- dentist
- DA
- office staff
