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| Caries removal & retention. |
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| Inverted Cone bur is used for: |
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| Straight Cylinder is used for: |
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| Bulk of prepping, parallel walls. |
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| Conservative preps and ideal undercuts. |
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| Bulk of prepping, removing large amounts of tooth structure. |
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| Refining prep, caries removal, pin placement, & prophylaxis. |
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| Pit or fissure on posterior or anterior tooth. |
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| Involves proximal surface of posterior tooth. |
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| Proximal surface of anterior tooth. |
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| Incisal angle of anterior tooth. |
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| Involves cervical third of anterior or posterior tooth. Generally buccal or lingual. |
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| Generally cusp tip pits on canines or premolars. |
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| Cleoid and Discoid carver |
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| Interproximal carver (IPC) |
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| 1st number in 3 and 4 number formula |
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| width of blade in tenths of millimeters |
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| 2nd number in 4 number formula |
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| Describes the angle of the cutting edge with the long axis of the handle |
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| 3rd number in 4 number formula |
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| 4th number in 4 number formula |
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| Describes the angle the blade forms with the axis of the handle, in centigrade |
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| 3rd number in 3 number formula |
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| Describes the angle the blade forms with the axis of the handle, in centigrade |
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| 2nd number in 3 number formula |
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| Length of blade in millimeters |
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| Radiopaque, well defined borders |
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| Typically appears radiolucent/ dark, poorly defined borders |
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| Radiopaque OR radiolucent, well defined borders |
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| axial pulpal lingual point angle |
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| The primary function of flares in occlusal class I amalgam preparation is to: |
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| Parallel the enamel rod and avoid undermining the enamel |
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| Proper condensation accomplishes all of the above |
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Definition
Increase the strength of the amalgam
o Increase the smoothness of the amalgam
o Create a solid mass of the amalgam |
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| Pre-carve burnishing of an amalgam restoration accomplishes all of the followings |
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Definition
Continue the condensation of the amalgam
o Brings the Hg to the surface of the amalgam
o Decreases the possibility of voids and porosities in the amalgam |
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Term
Required criteria for the ideal class I occlusion amalgam preparation on #4 includes all of
followings |
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Definition
90 degree cavosurface margins
o Flat, even pulpal floor
o Proper axial inclination, parralell with the long axis of the tooth |
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| Correctable carving errors in an amalgam includes the followings |
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Definition
A slightly over contoured margin
o A submarginal area less than 0.2mm
o Slightly overextended margin |
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| Ideally an axial wall of class V amalgam preparation on tooth # 15 should parallel the |
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| external surface of the tooth, which is generally convex |
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| When preparing a class I buccal pit amalgam, the proper preparation shape is determined by |
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| the anatomy of the tooth and the extent of the caries |
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| Class V amalgam preparation is characterized by a |
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| 90 degree (butt joint) cavosurface margin |
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| In general rounded internal line angles are indicated for |
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| In general, class I occlusal amalgams prep obtain their retention at the |
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triangular ridges and
fossa areas; not the terminal extensions |
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| Clinically amalgam prep must extend at least how far into dentin |
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When using Shofu polishing points, it is generally necessary to smooth and marginate the
restoration with |
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Definition
| finishing burs or stones prior to polishing |
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| The finishing procedure for amalgam restoration accomplishes all of the following |
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Definition
It corrects marginal discrepancies
It results in decreased plaque accumulation on or around the restoration
It prolongs the life of the restoration |
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Finishing and polishing of dental amalgam at least ______ to allow for complete
crystallization of the amalgam |
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Which one of the following should not be found in a convention amalgam alloy powder
solid in the US? |
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| In which of the following mechanical properties due amalgam and dentin differ |
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| All of the following are reasons that justify using pre-portioned amalgam capsules |
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Definition
Establish optional Hg allow ratio
Minimize the exposure of dental staff to Hg
Minimize infection control procedures since since the delivery system is disposable |
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Comparing condensation of a spherical vs. a latte cut amalgam which of the following is
true? |
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Definition
| The spherical alloy amalgam flows and adapts around the pins better |
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| The most serious concern related to the dental amalgam is |
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Definition
| Contamination of the environment with Hg and amalgam scrap |
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Which of the following properties are influenced by the amount of Hg in an amalgam
restoration |
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Definition
Compressive strength
Corrosion tendency
Creep
Marginal break down |
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Term
In comparing the resin matrix composite and amalgam restoration on a occlusal
posterior tooth surfaces all of the following are true except |
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Definition
Microleakage of the dental amalgam increases with time while that of a resin likely
decreases |
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