NDAEB Exam Prep Questions and Answers Graded A+
What are the 3 most common biopsy procedures? - Answer-Incisional, Excisional, and Exfoliative
What are the 3 'ages' of a child? - Answer-Chronological-actual age in terms of years
Mental Age-level of intellectual capacity
Emotional Age-child...
NDAEB Exam Prep
Questions and
Answers Graded A+
What are the 3 most common biopsy procedures? - Answer-Incisional, Excisional, and
Exfoliative
What are the 3 'ages' of a child? - Answer-Chronological-actual age in terms of years
Mental Age-level of intellectual capacity
Emotional Age-childs level of emotional maturity
What are Erikson's Stages of Development? - Answer-Learning Basic Trust-Infacy-1yo
Learning Autonomy-around 2yo, learn to walk run, sit, stand. basic fear.
Play Age-3-5yo able to follow simple instructions
School Age-6-11yo period of socialization
Adolescence-12-20yo puberty to young adulthood, self certainty
What is 'Spasticity'? - Answer-Increased muscle tension that manifests as an
exaggerated stretch reflex.
What is "Athetosis"? - Answer-Uncontrollable, involuntary, purpose-less and poorly
coordinated movements of the body, face, and extremities.
What is Traumatic Intrusion? - Answer-The tooth is forcibly driven into the alveolus so
that only a portion of the crown is visible. They should be allowed to re-erupt naturally.
What is an Avulsed Tooth? - Answer-A tooth that has been displaced from the socket. It
can be replanted with varying degrees of success.
What is the procedure for replanting an avulsed tooth? - Answer-1. Anesthetic.
2. Radiograph.
3. Removal of clotted blood.
4. Avulsed tooth washed in saline solution and inserted into alveolus.
5. Tooth splinted into place.
Are Dental Assistants legally required to report abuse? - Answer-No, but they have a
moral responsibility to report suspected cases to the dentist.
What is an Endogenous Stain? - Answer-A stain that originates from within the tooth
through development and systemic disturbances (ex. fluorosis)
What is an Exogenous stain? - Answer-A stain that originates from outside that tooth
caused by environment agents. These can be subdivided further into extrinsic(stains
that appear on the exterior of the tooth) and interior(stains that have become
incorporated into the structure of the tooth and thus cannot be removed)
What is Ectopic Eruption? - Answer-An abnormal direction of tooth eruption.
What are the 3 types of malocclusion? - Answer-Class I - normal molar relationship but
anterior tooth will be out of alignment.
Class II - "distoclusion" mand is in an abnormal distal relationship to the maxilla.
"buckteeth"
Class III - "mesioclusion" mand is in an abnormal mesial relationship to the maxilla
"underbite"
What two basic methods are used to acquire a digital x-ray image? - Answer-Direct
imaging(sensor) & indirect imaging(PSP)
Advantages of Digital Radiography - Answer-Immediate viewing of images, less
radiation, no chemicals, ability to enhance images, communication with other dentists,
no more lost films, remote consultation capability
Disadvantages of Digital Radiography - Answer-Cost, converting previous records to
digital, learning the computer software, thickness and rigidity of sensors, infection
control
What is intraoral film composed of? - Answer-Film Base - Clear Cellulose Acetate
Thin Adhesive Layer
Silver Halide Crystals - absorb radiation
A protective layer to protect the emulsion surface.
What is a latent image? - Answer-The image on the film that is not yet visible because it
has not been processed.
What does 'film speed' refer to? - Answer-The amount of radiation that is required to
produce a radiograph of standard density.
, True or false: The larger the silver halide crystals, the faster the film speed? - Answer-
True
What is the fastest film speed currently available? - Answer-F-Speed. (It reduces patient
exposure to radiation by 20-60% compared to E or D speed film)
What are the 3 types of x-ray film used in dental radiography? - Answer-Intraoral film,
extraoral film, and duplicating film.
When does a "Herringbone" pattern occur on dental film? - Answer-When it is placed in
the mouth backwards.
What are the 5 basic sizes that intraoral film comes in? - Answer-Child Size: 0
Narrow Anterior: 1
Adult Size: 2
Preformed bitewing: 3 (infrequently used)
Occlusal: 4
What are two common extraoral radiographs taken? - Answer-Panoramic and
Cephalometric.
What is an intensifying screen? - Answer-A device that intensifies or increases the
effect of radiation and thus decreases the amount of exposure time needed. It is coated
with phosphor which gives off light when struck by x-radiation.
What are the 5 steps in processing film? - Answer-1. Developing (reduce the silver
halide crystals into black metallic silver)
2. Rinsing (remove developer from film)
3. Fixing. (use an acidic solution to remove unexposed silver halide crystals)
4. Washing (wash the film)
5. Drying
What are the two techniques that can be used for exposing intraloral images? - Answer-
Bisecting & Paralleling
5 Basic Rules of the Paralleling Technique - Answer-1. Placement: it must cover correct
teeth to be examined
2. Position: it must be parallel to the long axis of the tooth.
3. Vertical Angulation: Central ray must be directed perpendicular to the receptor &
tooth.
4. Horizontal Angulation: Central ray must be directed through the contact areas.
5. Central Ray: it must be centered on the receptor.
Why is it important to have an 'exposure sequence' for receptor placement? - Answer-
To ensure an area is not omitted or exposed twice.
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