Exam (elaborations)
DASLE MN State Exam
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Exam of 25 pages for the course DASLE MN State at DASLE MN State (DASLE MN State Exam)
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DASLE MN State ExamWhat system has a tightening wrench to tighten and loosen the band? - ANSWER
Automatrix
What is the purpose of a wedge? How many do you need for an MOD restoration? -
ANSWER To contour and hold the band securely, 2 wedges
auto matrix is unique in that it has a wrench that does what? - ANSWER 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? - ANSWER Overhang or cupping
Class III & IV composites use what type of matrix system? - ANSWER Celluloid
strip "Mylar"
wedges function is to? - ANSWER 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? - ANSWER inserted on the
lingual side
what is used to insert the wedge? - ANSWER 110 howe pliers
The universal band when placed should extend _____ mm above the ________
surface? - ANSWER 1 ½ to 2 mm above the occlusal surface
what is T-band made from? - ANSWER stainless steel or copper
what is the universal retainer (tofflemire retainer) - ANSWER 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. - ANSWER 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? -
ANSWER 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 _______________? - ANSWER The distal and below the
height of contour
,Which side of the tooth is the clamp placed on first? - ANSWER Lingual, this allows
for a fulcrum to place the clamp
List items that can be used to invert dental dam. - ANSWER 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 _______? - ANSWER 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? - ANSWER Lingual, this allows
for a fulcrum to place the clamp
List items that can be used to invert dental dam. - ANSWER Air, Plastic instrument
(blunt instrument) black spoon or, beavertail burnisher, Waxed floss
List the hole punch numbers for each type of tooth: - ANSWER 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. - ANSWER 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. - ANSWER 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? - ANSWER Absorbs moisture, Latex allergies or
reduce latex sensitivity, Patient comfort
Which clamp is used for a class V restoration? - ANSWER Cervical clamp
(butterfly) 9, 212, 214 etc.
Which dental frame is placed under the dam material? - ANSWER Plastic U-
shaped frame due to being radiolucent
, Which dental frame is placed on the outside of the dam material? - ANSWER
Youngs U-shaped metal frame
Otsby plastic round frame
What happens if the holes are punched too close together? - ANSWER 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? - ANSWER 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? - ANSWER
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? - ANSWER 3.0-3.5 mm
Prior to the application of sealants, what are the teeth are cleaned with? - ANSWER
Prophy brush and non-fluoridated pumice, no oils (can interfere with the bonding
process)
Which are etched longer, permanent or primary teeth? - ANSWER Primary teeth
because they are stronger and teeth with fluorosis
What is the composition of the etching material? - ANSWER 37% phosphoric acid
(35-47%)
What is the best isolation technique when applying sealants? - ANSWER dental
dam
Describe characteristics of an etched surface. - ANSWER Dull
Frosted
Chalky
List contra-indicators for sealant placement. - ANSWER 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. - ANSWER Occlusal surfaces with pits &
fissures
Bu pit of mandibular molars
Li groove by cusp of Carabelli
Cingulum pits
Patient with high incidence of caries
How is liquid etch applied? What can happen if done incorrectly? - ANSWER
Dabbed continuously
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