NDAEB Practice Questions And Answers. 443
Questions and Correct Answers, Actual Exam
Questions Included.
Who was the first woman to graduate from a recognized dental college?
Lucy B. Hobbs-Taylor
What are the conditions that would indicate the need for restorative dentistry?
- initial or recurring decay
- replacement or failed restorations
- abrasion or wearing away of tooth structure
True or False: Aesthetic dentistry is primarily devoted to improving the appearance of teeth; specific
conditions that indicate a need for aesthetic treatment include the replacement of a partial denture.
False
The process of removing unhealthy tooth structure while leaving a limited amount of healthy structure
for the tooth to maintain a restoration is known as cavity preparation. This process involves which of
the following steps?
- initial preparation
- outline, resistance, retention, convenience form
- final preparation
Responsibilities of the dental assistant in the restorative process can include performing expanded
function and maintaining patient control.
True
Class II restorations are found on the....
Posterior teeth
The usual material of choice for class III and Class IV restorations is ...
Composite Resin
The Class V restoration is classified as a smooth surface filling and can be found on the...
- incisors
- canines
- premolars
When are retention pins used as a part of the direct restorative process?
,- when decay has extended beyond the normal size and shape of the cavity preparation
- when a stronger system for retaining and supporting the restoration is needed
- when one or more cusps of the tooth is missing
A veneer is a thin layer of tooth-coloured material that is placed on the facial surface of a prepared
tooth and is used for:
- improving appearance of teeth that are abraded, eroded or discoloured
- closing a diastema
- improving alignment of teeth
When is tooth whitening or vital bleaching not indicated for a dental patient?
when the patient presents with severe tetracycline and fluorosis stains
A matrix must be used to create a temporary wall for which of the following classifications of tooth
restoration?
Class II, III, and V
The most common matrix system used for class II posterior restorations is the...
tofflemire retainer and matrix band
The universal/Tofflemire retainer holds the matrix band snugly in position and is most often
positioned...
on the buccal surface of the tooth being restored
The class II restoration requires a matrix band to act as an artificial wall that must make proper contact
with the adjacent tooth; this is accomplished by...
- using a wedge
- contouring the centre of the matrix band in the proximal contact area
- the dentists design of the inter proximal cavity preparation
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
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