Exam (elaborations)
DASLE MN STATE With complete solution Latest 2024/25
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DASLE MN STATE With complete solution Latest 2024/25
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DASLE MN STATE With completesolution Latest 2024/25
What system has a tightening wrench to tighten and loosen the band? - Automatrix
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What is the purpose of a wedge? How many do you need for an MOD restoration? - To
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contour and hold the band securely, 2 wedges
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auto matrix is unique in that it has a wrench that does what? - has no retainer to hold the
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band in place. the tightening wrench is inserted into the coil and is turned clockwise to
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tighten the band
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II What occurs if the wedge is not place properly? - Overhang or cupping
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II Class III & IV composites use what type of matrix system? - Celluloid strip "Mylar"
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wedges function is to? - insert into the lingual embrasure to hold the band firmly against
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the gingival margin of the prep.
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II for posterior restoration, where is the wedge inserted? - inserted on the lingual side
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II what is used to insert the wedge? - 110 howe pliers
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The universal band when placed should extend _____ mm above the ________ surface?
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- 1 ½ to 2 mm above the occlusal surface
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II what is T-band made from? - stainless steel or copper
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what is the universal retainer (tofflemire retainer) - a mechanical device that holds the
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matrix band snugly in position. it's designed for class II amalgam restoration and
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intermediate. It's positioned from the buccal surface of the tooth being restored
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Explain the rule for posterior teeth isolation. - Isolate 1 to 2 teeth distal to the tooth being
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treated (working tooth), and isolate 3 to 4 teeth mesial or 6 to 8 teeth for better stability
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Explain the rule for anterior teeth isolation. What is the exception to the rule? - Isolate
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canine to canine, clamp may not be needed, ligate between canine and 1st premolar
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Anterior/cervical clamp may be used for Class V, endo tooth or premolar clamps may be II II II II II II II II II II II II II II
used
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The bow of the dental dam clamp is placed towards the _____ and the four points of the
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clamp are resting _______________? - The distal and below the height of contour
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, Which side of the tooth is the clamp placed on first? - Lingual, this allows for a fulcrum to
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place the clamp
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List items that can be used to invert dental dam. - Air, Plastic instrument (blunt
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instrument), black spoon or beavertail burnisher, Waxed floss
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the bow of the dental dam clam is placed towards the _____ and the four points of the
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clamp are resting _______? - towards the distal and the four points of the clamp are
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resting below the height of contour
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Which side of the tooth is the clamp placed on first? - Lingual, this allows for a fulcrum to
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place the clamp
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List items that can be used to invert dental dam. - Air, Plastic instrument (blunt
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instrument) black spoon or, beavertail burnisher, Waxed floss
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List the hole punch numbers for each type of tooth: - 5 - Anchor Tooth (clamped tooth) or
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keyhole punch #5 (double punched if using a winged clamp)
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4 - MX & MN molars
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3 - MX & MN canines and premolars
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2 - Maxillary anterior centrals & laterals
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1 - Mandibular anterior centrals & laterals
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List the steps for removal of the dental dam. - Remove opposite ligature/anchor (Wedjet
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or floss)
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Cut the dam septum on the facial side
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Remove the clamp II II
Remove dam and frame II II II
Check for pieces II II
Floss
Massage tissue II
List the uses/advantages of using dental dam. - Better patient management and
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protection from debris, materials and liquids
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Controls moisture II
Decreases operator time II II
Effective barrier control for infection control II II II II II
Used for RCT, sealants, restorations, whitening, not used for oral surgery
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Why is a dental dam napkin used? - Absorbs moisture, Latex allergies or reduce latex
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sensitivity, Patient comfort
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Which clamp is used for a class V restoration? - Cervical clamp (butterfly) 9, 212, 214
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etc.
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, Which dental frame is placed under the dam material? - Plastic U-shaped frame due to
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being radiolucent
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Which dental frame is placed on the outside of the dam material? - Youngs U-shaped
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metal frame
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Otsby plastic round frame II II II
What happens if the holes are punched too close together? - the dam may tear and
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stretch. stretched holes may leave the gingiva exposed and may cause leakage
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What happens if the holes are punched too far apart? - excess material is present
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between the teeth. this may block the DDS vision or catch in instrumentation
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What happens if the curve of the arch is punched too flat? Too narrow? - If too flat or wide
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= bunching on lingual
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If too curved or narrow = folding on the facial
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II How far apart should the holes be spaced? - 3.0-3.5 mm
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Prior to the application of sealants, what are the teeth are cleaned with? - Prophy brush
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and non-fluoridated pumice, no oils (can interfere with the bonding process)
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Which are etched longer, permanent or primary teeth? - Primary teeth because they are
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stronger and teeth with fluorosis
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II What is the composition of the etching material? - 37% phosphoric acid (35-47%)
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II What is the best isolation technique when applying sealants? - dental dam
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Describe characteristics of an etched surface. - Dull
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Frosted
Chalky
List contra-indicators for sealant placement. - Occlusal surface is smooth and easy to
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clean
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Decay on occlusal surface II II II
Decay on interproximal surface II II II
Restoration already in place II II II
List the indications for sealant placement. - Occlusal surfaces with pits & fissures
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Bu pit of mandibular molars
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Li groove by cusp of Carabelli
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Cingulum pits II
Patient with high incidence of caries II II II II II
II How is liquid etch applied? What can happen if done incorrectly? - Dabbed continuously
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