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DASLE MN EXAM QUESTIONS AND ANSWERS

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dasle mn exam questions and answers

Instelling DASLE MN
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DASLE MN EXAM QUESTIONS AND ANSWERS
What system has a tightening wrench to tighten and loosen the band? - Answers-
Automatrix

What is the purpose of a wedge? How many do you need for an MOD restoration? -
Answers-To contour and hold the band securely, 2 wedges

auto matrix is unique in that it has a wrench that does what? - Answers-has no retainer
to hold the band in place. the tightening wrench is inserted into the coil and is turned
clockwise to tighten the band

What occurs if the wedge is not place properly? - Answers-Overhang or cupping

Class III & IV composites use what type of matrix system? - Answers-Celluloid strip
"Mylar"

wedges function is to? - Answers-insert into the lingual embrasure to hold the band
firmly against the gingival margin of the prep.

for posterior restoration, where is the wedge inserted? - Answers-inserted on the lingual
side

what is used to insert the wedge? - Answers-110 howe pliers

The universal band when placed should extend _____ mm above the ________
surface? - Answers-1 ½ to 2 mm above the occlusal surface

what is T-band made from? - Answers-stainless steel or copper

what is the universal retainer (tofflemire retainer) - Answers-a mechanical device that
holds the matrix band snugly in position. it's designed for class II amalgam restoration
and intermediate. It's positioned from the buccal surface of the tooth being restored

Explain the rule for posterior teeth isolation. - Answers-Isolate 1 to 2 teeth distal to the
tooth being treated (working tooth), and isolate 3 to 4 teeth mesial or 6 to 8 teeth for
better stability

Explain the rule for anterior teeth isolation. What is the exception to the rule? - Answers-
Isolate canine to canine, clamp may not be needed, ligate between canine and 1st
premolar
Anterior/cervical clamp may be used for Class V, endo tooth or premolar clamps may be
used

,The bow of the dental dam clamp is placed towards the _____ and the four points of the
clamp are resting _______________? - Answers-The distal and below the height of
contour

Which side of the tooth is the clamp placed on first? - Answers-Lingual, this allows for a
fulcrum to place the clamp

List items that can be used to invert dental dam. - Answers-Air, Plastic instrument (blunt
instrument), black spoon or beavertail burnisher, Waxed floss

the bow of the dental dam clam is placed towards the _____ and the four points of the
clamp are resting _______? - Answers-towards the distal and the four points of the
clamp are resting below the height of contour

Which side of the tooth is the clamp placed on first? - Answers-Lingual, this allows for a
fulcrum to place the clamp

List items that can be used to invert dental dam. - Answers-Air, Plastic instrument (blunt
instrument) black spoon or, beavertail burnisher, Waxed floss

List the hole punch numbers for each type of tooth: - Answers-5 - Anchor Tooth
(clamped tooth) or keyhole punch #5 (double punched if using a winged clamp)
4 - MX & MN molars
3 - MX & MN canines and premolars
2 - Maxillary anterior centrals & laterals
1 - Mandibular anterior centrals & laterals

List the steps for removal of the dental dam. - Answers-Remove opposite
ligature/anchor (Wedjet or floss)
Cut the dam septum on the facial side
Remove the clamp
Remove dam and frame
Check for pieces
Floss
Massage tissue

List the uses/advantages of using dental dam. - Answers-Better patient management
and protection from debris, materials and liquids
Controls moisture
Decreases operator time
Effective barrier control for infection control
Used for RCT, sealants, restorations, whitening, not used for oral surgery

Why is a dental dam napkin used? - Answers-Absorbs moisture, Latex allergies or
reduce latex sensitivity, Patient comfort

, Which clamp is used for a class V restoration? - Answers-Cervical clamp (butterfly) 9,
212, 214 etc.

Which dental frame is placed under the dam material? - Answers-Plastic U-shaped
frame due to being radiolucent

Which dental frame is placed on the outside of the dam material? - Answers-Youngs U-
shaped metal frame
Otsby plastic round frame

What happens if the holes are punched too close together? - Answers-the dam may tear
and stretch. stretched holes may leave the gingiva exposed and may cause leakage

What happens if the holes are punched too far apart? - Answers-excess material is
present between the teeth. this may block the DDS vision or catch in instrumentation

What happens if the curve of the arch is punched too flat? Too narrow? - Answers-If too
flat or wide = bunching on lingual
If too curved or narrow = folding on the facial

How far apart should the holes be spaced? - Answers-3.0-3.5 mm

Prior to the application of sealants, what are the teeth are cleaned with? - Answers-
Prophy brush and non-fluoridated pumice, no oils (can interfere with the bonding
process)

Which are etched longer, permanent or primary teeth? - Answers-Primary teeth because
they are stronger and teeth with fluorosis

What is the composition of the etching material? - Answers-37% phosphoric acid (35-
47%)

What is the best isolation technique when applying sealants? - Answers-dental dam

Describe characteristics of an etched surface. - Answers-Dull
Frosted
Chalky

List contra-indicators for sealant placement. - Answers-Occlusal surface is smooth and
easy to clean
Decay on occlusal surface
Decay on interproximal surface
Restoration already in place

List the indications for sealant placement. - Answers-Occlusal surfaces with pits &
fissures

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