Description : High content copper amalgam . . . a. generally requires greater energy to accomplish trituration b. should be placed rapidly in large increments c. Continues to leak since the ... not cause galvanism in oral environment e. is equally effective as conventional alloys in clinical studies
Last Answer : a. generally requires greater energy to accomplish trituration
Description : What is the most common fracture of Class II amalgam restorations: A. Isthmus because of insufficient depth B. Internal fracture C. Marginal ridge site
Last Answer : A. Isthmus because of insufficient depth
Description : Which of the following statement about the defective margins of amalgam restorations is true?+M07 A. The larger the breakdown, the greater the chance of decay. IF THERE IS MARGINAL BREAKDOWN THIS DOSNT NECESSITATE THE PRESENCE OF CARIES ALONG MARGIN So the ans is Chances are increased
Last Answer : A. The larger the breakdown, the greater the chance of decay.
Description : 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
Last Answer : A. Increased compressive strength
Description : .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
Last Answer : B. Less corrosion
Description : What is true about Angioneurotic oedema, A. Puffiness around the eyes, oedema of the upper lip with redness and dryness B. Caused by several deep restorations in the anterior teeth C. There is no caries, negative thermal tests, negative percussion and negative response to palpation
Last Answer : A. Puffiness around the eyes, oedema of the upper lip with redness and dryness B. Caused by several deep restorations in the anterior teeth
Description : A 9 years-old boy has a small white discolouration on his maxillary central incisor. The lesion is most probably, A. Hypocalcification due to trauma of the primary predecessor B ... the histo differentiation stage of development D. Defect during the morho differentiation stage of development
Last Answer : A. Hypocalcification due to trauma of the primary predecessor
Description : Which antibiotic administered in childhood may result in tooth discolouration: A. Penicillin B. Tetracycline C. Streptomycin
Last Answer : B. Tetracycline
Description : Recession of gingiva of several anterior teeth caused by exposure and softened cementum; what would you do? A. Scrap the soften cementum and apply fluoride B. Scrap the soften cementum and use GIC C. Class V amalgam
Last Answer : B. Scrap the soften cementum and use GIC
Description : .What is the percentage of the echant agent used with composit resin restorations? a . 37% of phosphoric acid in water. b. 15% c. 18.5% d. 41%
Last Answer : a . 37% of phosphoric acid in water.
Description : Why do you itch enamel for composite restorations: A. To increase surface area B. To decrease surface area C. Does not really change the surface area D. Increase the chemical bonding capability E. Decrease the chemical bonding capability
Last Answer : A. To increase surface area
Description : Longest lasting resin restorations are, A. Class I B. Class II C. Class III D. Class IV
Last Answer : C. Class III
Description : In class II restorations, all of the following are considered to occur as probable causes of periodontal problems except: A. Flat ridge B. Faulty or not proper contour C. Not properly polished restoration D. Cervical wall is too deeply apical E. Overextension of lining in cavity
Last Answer : E. Overextension of lining in cavity
Description : Etching techniques are used always to: A. minimise the leakage of restorations B. for aesthetic considerations
Last Answer : A. minimise the leakage of restorations
Description : .In which class of cavities do composite restorations show most durability: A. I B. II C. IV D. III E. V
Last Answer : D. III
Description : Class V composite resin restorations can be polished, A. 24 hours after application B. Immediately after application C. 3 to 4 days D. 3 to 4 weeks E. Not at all
Last Answer : B. Immediately after application
Description : When do you finish composite resin restorations: A. Immediately after curing B. After 24 hours C. A week after placement
Last Answer : A. Immediately after curing
Description : A 45 years-old patient awoke with swollen face, puffiness around the eyes, and oedema of the upper lip with redness and dryness. When he went to bed he had no swelling, pain or ... B. Angioneurotic oedema C. Infectious mononucleosis D. Acute maxillary sinusitis E. Acute apical periodontitis
Last Answer : B. Angioneurotic oedema
Description : (a) What are groups' and periods' in the periodic table'? (b) Two elements M and N belong to group I and II respectively and are in the same period of the periodic ... Sizes of their atoms Their metallic characters Their valencies in forming oxides Molecular formulae of their chlorides -Science
Last Answer : (a) The vertical columns in the periodic table are called groups'. The horizontal rows in the periodic table are called periods'. (b) M' and N' belong to same period but group I ... oxides. Valency goes on increasing first and then decreases. MCI, NCI2 are molecular formulae of their chlorides.
Description : Oral mucosal pigmentation; what is TRUE: a. Commonly depends on ethnicity. b. Commonly an amalgam tattoo. c. Commonly oral melanoma. d. Commonly melanotic naevus.
Last Answer : a. Commonly depends on ethnicity.
Description : Amalgam restoration, when do you have to replace it? a. Ditching of the edges. b. The probe penetrates the area between the margin and tooth tissue. c. Fissure of the surface of the amalgam. d. When there is chronic inflammation of the pulp.
Last Answer : c. Fissure of the surface of the amalgam.
Description : Burnishing the amalgam after carving, what is the benefit? a.Completing the condensation at the marginal edges. b.eleminating excessive mercury
Last Answer : .Completing the condensation at the marginal edges.
Description : What is correct in regard to high copper amalgam, A. Reacts and strengthens the amalgam by its dispersion properties B. Reacts to form copper-tin phase thereby eliminating the tin-mercury ... thereby eliminating the silver mercury phase D. Reacts and strengthens the amalgam by its grain diffusion
Last Answer : B. Reacts to form copper-tin phase thereby eliminating the tin-mercury phase
Description : In preparing a very small proximal amalgam cavity on a molar tooth what would consider, A. Extend the cavity to the gingival margin B. Extend the cavity beyond the contacts areas C. Achieve at least 2mm in dentine D. Extend cavity just beyond dento enamel junction
Last Answer : D. Extend cavity just beyond dento enamel junction
Description : Which one of this restorative methods will be LEAST compromised by a core, A. Amalgam B. Composite C. GIC D. Cast gold
Last Answer : D. Cast gold
Description : What is the property of high copper amalgam A. Reduced physical creep B. Higher retention
Last Answer : A. Reduced physical creep
Description : After the placement of a class I amalgam the patient comes back to you complaining of pain on masticating and biting; what is the first thing you would look at, A. Occlusal height B. Contacts areas
Last Answer : A. Occlusal height
Description : The principal reasons for placing a gingival interproximal wedge in conjunction with a matrix for amalgam condensation are to: 1. separate the teeth slightly 2. keep the band tight at the gingival margin 3. contribute to the ... b. 1,2,4 c. 2,3,4 d. 1,3,4 e. all of the above
Last Answer : e. all of the above
Description : Occasional sensitivity in a shallow class I amalgam restoration after two days would be managed by: A. Replace old filing immediately B. Oxide Zinc and eugenol C. Using thicker mix of cements D. Tell patient the discomfort will disappear after 4 t o6 weeks E. Ledermix
Last Answer : D. Tell patient the discomfort will disappear after 4 t o6 weeks
Description : In a posterior vital molar with a core the best material to restore is: A. Amalgam B. Composite resin C. GIC
Last Answer : A. Amalgam
Description : What is TRUE about Oral mucosal pigmentation;: A. Commonly seen in ethnic groups B. Commonly an amalgam tattoo C. Commonly oral melanoma D. Commonly melanotic naevus
Last Answer : A. Commonly seen in ethnic groups
Description : 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
Last Answer : B. Between core and cement
Description : 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
Last Answer : B. 2mm to achieve a good resistance form
Description : 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
Last Answer : A. The wider the gap the better the chance of secondary caries
Description : 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
Last Answer : C. Obtuse angle
Description : 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
Last Answer : A. Just supragingival whenever is possible
Description : 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
Last Answer : C. When restoring with GIC base and composite lamination
Description : 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 ... E. Provide an acceptable surface texture to the proximal surface F. All of the above
Last Answer : F. All of the above
Description : 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
Last Answer : A. The stronger the restoration which contains fewer matrix alloys and fewer voids
Description : 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
Last Answer : B. Less fracture potential for amalgam
Description : The principle cause of failure of amalgam restoration is: A. Improperly prepared amalgam B. Improper cavity preparation C. Perio involvement D. Particles of amalgam
Last Answer : B. Improper cavity preparation
Description : 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
Last Answer : B. Inadequate depth at the isthmus area
Description : Retention for occlusal amalgam cavities in premolars is BEST provided by A. Slightly undercutting of walls with inversed cone bur B. Mesial and distal undercuts C. Buccal and lingual undercuts
Last Answer : C. Buccal and lingual undercuts
Description : Pin Restoration with which material has the best retention: A. Amalgam B. Gold inlay C. Composite D. Glass Ionomer
Last Answer : C. Composite
Description : 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
Last Answer : C. Secondary caries
Description : How much space do you need to cap a weakened cusp with amalgam: A. 1mm B. 1.5mm C. 2mm D. 2.5mm
Last Answer : C. 2mm
Description : 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
Last Answer : B. Pulpectomy
Description : Which of the following restoration material’s strength is not effected by pins: A. Amalgam B. Composite resin
Last Answer : B. Composite resin
Description : 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°
Last Answer : B. An obtuse angle si es el cajon proximal
Description : 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 ... is mixed with mercury E. Amalgam is an alloy of two or more metals, one of them is tin
Last Answer : C. Amalgam is an alloy of two or more metals, one of them is mercury