Oral mucosal pigmentation; what is TRUE: a. Commonly depends on ethnicity. b. Commonly an amalgam tattoo. c. Commonly oral melanoma. d. Commonly melanotic naevus.

Oral mucosal pigmentation; what is TRUE:
 a. Commonly depends on ethnicity.
 b. Commonly an amalgam tattoo.
 c. Commonly oral melanoma.
 d. Commonly melanotic naevus.
by

1 Answer

Answer :

a. Commonly depends on ethnicity.
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Related questions

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A vital tooth has a crown cemented to a pin-retained amalgam core; where does a failure occur: A. Between crown and cement B. Between core and cement C. In the crown and the root D. In the core and the margin preparation

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How much would you reduce a cusp to be replaced with amalgam onlay: A. 2 mm to achieve a good retention form B. 2mm to achieve a good resistance form C. 1mm

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In regard to marginal leakage in amalgam: A. The wider the gap the better the chance of secondary caries B. Seal the margin with fissure sealant would prevent further breakdown C. Secondary caries may develop

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At what angle to the external surface should proximal cavosurface walls in Class II preparation for the reception of an amalgam filling be finished: A. Acute angle B. Right angle C. Obtuse angle D. 45 angle

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The cervical finish line of a full veneer crown preparation should be placed: A. Just supragingival whenever is possible B. According to the depth of gingival crevice C. Subgingival to reduce ability of recurrent caries D. At the junction of tooth and amalgam core

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Corrosion and discolouration of amalgam restorations is usually caused by: A. Sulphur oxides B. Oxygen C. Chlorides D. Over trituration

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When is a gingival groove LEAST required: A. When restoring with GIC for abrasion B. When restoring with GIC for root caries C. When restoring with GIC base and composite lamination D. When restoring with amalgam

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Function of matrix band: A. Substitute for the missing wall so adequate condensation forces can be applied B. Permit re-establishment of proper contact lines C. Restrict extrusion of amalgam and prevent formation of an “overhang” D. Provide adequate physiological contour for the proximal surface E. Provide an acceptable surface texture to the proximal surface F. All of the above

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The less mercury remaining in condensed amalgam: A. The stronger the restoration which contains fewer matrix alloys and fewer voids B. The weaker the restoration C. The more matrix alloys D. The more voids E. None of the above

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Reduced occlusal area means: A. More fracture potential for amalgam B. Less fracture potential for amalgam C. Pulpal involvement D. Perio involvement E. None of the above

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The principle cause of failure of amalgam restoration is: A. Improperly prepared amalgam B. Improper cavity preparation C. Perio involvement D. Particles of amalgam

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Last Answer : B. Improper cavity preparation

The most common cause of fracture at the isthmus of class II dental amalgam restoration is: A. Delayed expansion B. Inadequate depth at the isthmus area C. Inadequate width at the isthmus area

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High copper amalgam lasts longer than low copper amalgam because of:** A. Increased compressive strength B. Increased corrosion resistance C. High creep D. Increased tensile strength E. Decreased setting expansion

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Pin Restoration with which material has the best retention: A. Amalgam B. Gold inlay C. Composite D. Glass Ionomer

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If amalgam gets contaminated with moisture, the most uncommon result is:** A. Blister formation B. Post operative pain C. Secondary caries D. Lower compressive strength

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How much space do you need to cap a weakened cusp with amalgam: A. 1mm B. 1.5mm C. 2mm D. 2.5mm

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.The main advantage of amalgam with high content of Cu is: A. Better marginal sealing B. Less corrosion C. Better tensile strength D. Higher and immediate compressive strength

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Last Answer : B. Less corrosion

Caries which is close to the pulp chamber; on x rays you find ‘dens in dente’; the right treatment is: A. Zinc oxide eugenol cement and amalgam B. Pulpectomy C. Pulpotomy D. Calcium hydroxide on pulp and amalgam

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Last Answer : B. Pulpectomy

Which of the following restoration material’s strength is not effected by pins: A. Amalgam B. Composite resin

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At which angle to the external surface of proximal cavity walls should a class II preparation for amalgam be finished A. An acute angle B. An obtuse angle si es el cajon proximal C. A right angle D. An angle of 45°

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Last Answer : B. An obtuse angle si es el cajon proximal

Choose a statement that correctly defines the term AMALGAM: A. Amalgam is a metallic powder composed of silver, tin, copper and zinc B. Amalgam is an alloy of two or more metals that have been dissolved in each other in the molten state. C. Amalgam is an alloy of two or more metals, one of them is mercury D. Amalgam is a metallic substance in powder or tablet from that is mixed with mercury E. Amalgam is an alloy of two or more metals, one of them is tin

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Last Answer : C. Amalgam is an alloy of two or more metals, one of them is mercury

When restoring weakened cusps with dental amalgam you should consider: A. 2mm reduction while forming a flattened surface B. 2mm reduction while following the original contour of the cusps C. 4mm reduction while forming a flattened surface D. 4mm reduction while following the original contour of the surface

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The optimum cavosurface angle for occlusal amalgam surface is: A. 45-60° B. 70-85° C. 45-80° D. 95-110° E. 130-150°

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A large amalgam core is to be condensed around several pins in a vital molar tooth; what type of amalgam mix would you prefer: A. A large mix to ensure homogeneity B. A large with extra mercury to give easier manipulative qualities C. Several small mixes, sequentially triturated D. Several small mixes with varying mercury/alloy ratios E. A basic mix to which additional mercury is added as needed

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