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Which of the following constituents of amalgam alloy decreases expansion____________? What is used to triturate capsulated dental materials? Dissolve the alloy in mercuryD. 55-65%B. Increases the strength of lathe cut alloy but reduces the strength of spherical alloy amalgamC. When 30-50% of the upper teeth protrude over the lower teeth, an overbite occurs. A. Compressive strength values for amalgam specimen and loading rates are about 5 times greater than that of tensile value. Inhalation of mercury vapoursC. 2. A. The dental amalgam must be strong enough to withstand forces during function, and ideally develop early strength so that it is not damaged before it is fully set. No phase is eliminated. Maximum matrix phaseB. Strength of Dental Amalgam. What is the recommended for condensation of dental amalgam ? MullingC. 1-2 daysB. Fully set: -Hard, strong, durable restoration. Dental amalgam prepared from high copper and conventional alloys was evaluated for its compressive strength as a function of deformation rate. Tarnish and corrosionD. Amalgams Amalgams Dental Materials Dental Materials Mcqs for preparation. A. Gamma 1 and 2B. The dental amalgam must be strong enough to withstand forces during function, and ideally develop early strength so that it is not damaged before it is fully set. The properties exhibited by the final set material depend on the structure of its various phases, their proportions and their individual strengths. None of the above. silver, but also contains copper & tin. None of the above. Altering Hg-Alloy ratioD. Using spherical particlesC. 49% silver, 32% tin and 19% copper C. 65% silver, 29% tin and 5-6% copper D. Dr.Reem Gamal A. after 1 hr. This plastic mass hardens by the formation of solid reaction product phases. with amalgam were most fracture resistant. A. Compressive stress B. A. Copper content in low copper amalgam is________________? The resultant alloy is lesserC. For this purpose amalgam capsules with two different content of copper were used. AdmixedD. and spherical. A. Tin. A. - Corrosion Resistance. Which of the following are characteristic feature of high copper amalgam alloy ? 1975;68(5):181-4. Short Mixing TimeB. A. At the margin of the restorationB. Due to the poorer mechanical properties, flowable composites should be used with caution in high stress-bearing areas. Outstanding clinical performance of dental amalgam restoration is related to its____________? 4 hoursB. Three to four minutesC. 140 Mpa C. 260 Mpa D. 510 Mpa. Advantage of minimum mercury technique or Eames technique is all Except________________? 65-85%D. A. 1. A. Compressive stressB. SDI spherical amalgam. An alloy of two or more metals one of which is mercuryC. mg / m3D. # The ADA specification no. Impact stress C. Shear stress D. Tensile stress. Mcq Added by: EHAB KHAN. 9-20% copper B. In the centre of the restorationD. A. Decreases creepB. Chemical CorrosionB. A. A. Tin / Mercury phaseB. Decreased compressive, decrease tensile strengthC. tensile stress. 260 Mpa C. 140 Mpa D. 510 Mpa. The manipulation of dental amalgam after placement in the prepared tooth cavity is easy. None of the above. 6 7. The reason for this can be mainly_____________? A. Has tensile strength both at 15 minutes and 7 days is comparable to high copper, unicompositional alloysD. Teeth were restored with 4 types of material: AM, MODd restored with amalgam; CR, MODd restored with composite resin; LPR, MODi restored with laboratory-processed composite resin; and LGC, MODi restored with leucite-reinforced glass ceramic. STRENGTH • Resistance to compressive forces - most favorable strength feature of amalgam • Amalgam is strong in compression but weak in tensile AMALGAM COMP.STRENGTH (MPa) 1 HOUR 7 DAYS TENSILE STRENGTH 24 HOURS MPa LOW COPPER 145 343 60 ADMIXED 137 431 48 SPHERICAL SINGLE 262 510 64 COMPOSITION 37. A. ShrinkageB. Dental Amalgam restorative material composed of silver-based alloy mixed with mercury. The threshold limit value of mercury exposures is_______________? From smooth atomized particlesD. Many reasons contribute to overbite problems in childr... World No Tobacco Day 2017 : Poster Competition at ... Tobacco: A Threat to Development : World No Tobacc... MCQs on Gastrointestinal Tract and Liver Physiolog... MCQs on Gastrointestinal tract and Liver Physiolog... MCQs on Odontogenic cysts and Tumors - Oral Pathol... MCQs on Odontogenic Cysts and Tumors - Oral Pathology, MCQs on Cardiovascular System - Physiology Part 2, MCQs on Cardiovascular System - Physiology. Explanations are useful to guide through learning process and confirm that the correct answer is indeed correct. Speed of amalgamatorD. A. Many can last much longer, with some amalgams documented as lasting 30 to 40 years. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be________________? Cavosurface angle for Amalgam restoration is 90 degrees and forms a butt end.butt end as it increases compressive and tensile strengths. Glass Ionomer Cement (GIC) has wide range of applications in dentistry. The well-known disa-dvantages of amalgam such as slow setting process and the lack of adhesion to the tooth structure [8], weak in … Valiant PhD XT amalgam was tested with 300 shear-strength (N=15) and 120 compressive-strength (N=6) specimens, divided into 1-day and 30-day groups, each with control, water, saliva, blood, and lubricant oil contamination samples. The word amalgam means any material that contains_____ Mercury (Hg) What is the composition of amalgam? no. Have less marginal breakdownB. Achieves lowest compressive strength at 1 hr.C. High tensile strengthC. comparison, the compressive strength of dentin and enamel is 30,000 psi and 100,000 psi, respectively. Cannot be predictable, Cavo surface angle for amalgam resoration is butt joint as____________?0, A. Materials that are more resistant under compressive forces than under tensile forces, are called malleable. The material (as with other brittle materials) is strongest in compression and weakest in tension. 49% silver, 32% tin and 19% cooperB. Gamma 2C. Range. One to two minutesD. C) A study conducted by the National Institutes of Health (NIH)in 1991-1993 concluded that amalgam is not safe for human use. Kidneys. Process whereby alloy is wetted by mercuryB. This is because of the presence of Yttria stabilized Zirconia particles in the material that increased the compressive strength [19]. Remove oxides from powder particle surfaceD. Clinical studies indicate a typical life expectancy of about 15 years for class I and II amalgams. Increase in the residual mercury in silver amalgam filling can_____________? Compressive Strength (MPa) Maximum. 9-20% copper B. Reduces contractionD. An amalgam restoration needs to be strong enough so as to resist the biting forces of occlusion. 45-55%C. Amalgam is as great or greater than that value.the compressive Some consider amalgam restorations are (CS) and tensile (TS) strengths of several considered esthetic restorations 10 10 Dental amalgam: low copper and high copper amalgams are reported. During amalgamation, trituration is done to_____________? The resultant alloy varies according to the content of Ag of CuB. Mercury is toxic because it_____________? A. Sulphides of silverB. Extensive investigation and test work of dental restorative materials including dental amalgams has revealed that creep resistance is perhaps the single most important mechanical property followed by compressive strength as it relates to failure or fracture of dental restorations. Absorption of mercury in the human body occurs least from_____________? A. Mercury is liquid at room temperature , it reacts with other metals that are in solid state, to form a plastic mass, which can be conveniently packed into a prepared tooth preparation. Nascent oxygen, A. Impact stress C. Shear stress D. Tensile stress # The ADA specification no. Dental amalgam Download PDF Info Publication number US3305356A. High strength amalgam is achieved by_____________? Achieve a workable mass of amalgam in minimum time. 65% silver, 32% tin and 3% copper B. A. Pulverize pelletes into particles to aid in attack by mercuryB. OBJECTIVE: To purpose of this study was to compare the cyclic contact fatigue resistance of a novel mercury-free silver direct filling material to that of a dental amalgam (Dispersalloy). A metallic powder composed of silver, tin, copper and zincB. A. Fracture of the restorationB. Amalgam achieves 70% of the strength by____________? irregular, admixed. Strength. In spherical alloys as compared to lathe cut____________? According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be_____? C. Resistance to creep D. Toxicity to pulp and dentin ... C. Less compressive strength but more tensile strength D. Less compressive strength and tensile strength # What is the most frequeently used restorative material? All of the above. - Dimensional Stability. Silver and tin are the most common elements found in dental amalgam alloy, although amalgam alloys are sometimes referred to as either low-copper (i.e., less than ~5% Cu by weight) or high-copper alloys (i.e., 6% Cu or higher by weight). A. Chlorides of tinC. Decreased compressive, increased strengthD. The material (as with other brittle materials) is strongest in compression and weakest in tension. Moisture contamination of amalgam can lead to_____________? Zinc and waterC. Amalgam restorations must resist the biting forces of occlusion. In the deepest part of the restorationC. Dry corrosion. Thus, ANOVA showed that A-FA1 (the amalgam with 1 wt.% FA) had the highest compressive strength among all the tested dental amal- gams (p<0.05) and A-FA5 had the lowest. The main disadvantage of amalgam tooth fillings is the color. US3305356A US320503A US32050363A US3305356A US 3305356 A US3305356 A US 3305356A US 320503 A US320503 A US 320503A US 32050363 A US32050363 A US 32050363A US 3305356 A US3305356 A US 3305356A Authority US United States Prior art keywords alloy weight silver amalgam copper Prior art date 1963 … What fraction of inhaled mercury vapors retained in the body ? A. Discolouration of silver alloy is due to_____________? Minimum alloy phase. Many of the high-copper spherical amalgams gain about 50% of their compressive strength in the first hour, but it takes up to 24 hours for most amalgams to gain maximum strength Initial set: -Can no longer be carved.-Firm, not fully reacted (brittle).-Tell pt not to bite on it for several hours. Cavosurface angle for Amalgam restoration is 90 degrees and forms a butt end.butt end as it increases compressive and tensile strengths. Increase the strengthC. 21 Gpa and 27 – 55 MpaC. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be_____? The dental amalgam is most resistant to________________? 80 Mpa B. The term commonly used to refer to dimethacrylate is _____ BIS_GMA. ... Its wear resistance and compressive strength are superior to composite resin and glass ionomer cement. Low tensile and compressive strengthB. Maximum matrix and minimum alloy phaseD. Silver . Min. SELECTION OF ALLOYS : Since numerous alloys of dental amalgam are available, selecting the best amalgam for use can be confusing. 1 for composition of amalgam alloy recommends, A. 65% silver, 29% tin and 5-6% copperD. Less than 0.01%D. - Less mercury release. Increase with condensation pressureD. Tooth colored Restorative Dental Materials are being used more profusely in Dentistry as the need for Aesthetics has increased and the tooth colored materials are having similar properties to materials like Amalgam. The main goal of this research is to investigate the effect of copper on compressive strength of dental amalgam. thermal changes. Long clinical service life contamination would produce for a Disadvantages: composite restoration. Dental amalgam has high compressive strength, which is 380MPa for low-copper amalgam and 414MPa for high-copper amalgams. Past papers of Amalgams ( Dental Materials ) Mcqs . Needs no squeezing of excess mercuryD. An amalgamable silver-base metal powder containing about 8% to about 27% copper, 20% to about 32% tin, and the balance consisting essentially of silver, which upon admixture with about 42% to 54% mercury forms a dental amalgam of improved strength and corrosion resistance. 0. Affiliation 1 Department of Endodontics (M/C 642), College of Dentistry, University of Illinois at Chicago 60612, USA. The compressive strength of dental amalgam (380 − 540 MPa) develops progressively after trituration but tensile (57 MPa) and flexural (114 MPa) strengths are much lower, making amalgam brittle [5]. The fracture resistance (N) was assessed under compressive load in a universal testing machine. Which of the following statement is true regarding lathe cut low Copper silver alloy ? Which is not true about high copper amalgam alloys______________? 3 minutesD. Binds to sulfhydryl groups. Decrease the tarnish and corrosion resistanceC. Which of the following statements about high copper silver alloy compared to conventional alloy is not true ? 65% silver, 32% tin and 3% copper B. More gamma 1 phase formed. The Mcqs having specific numbers in any written test. Zinc / Mercury phase. 40 Gpa and 60 – 100 MpaD. Toxicity to pulp and dentin. Most amalgams have a high copper content. A. Ingestion of mercuryB. A. Which of the following silver amalgam alloy have the maximum strength________________? SDI Admix amalgam is a premium dental alloy, for the preparation of non-gamma 2 dental amalgam. 140 Mpa C. 260 Mpa D. 510 Mpa. None of the above. Brittle Fracture of Dental Amalgam KAMALASGAR and LLOYDSUTFIN University ofMichigan, School ofDentistry, AnnArbor, Michigan Thebrittleness of dental amalgamlimits its use to sites in which tensile stresses can be keptataminimum.If thecause for the brit- tleness could be ascertained, then an ap- proach to correct this problem could be devised. Pushes the material together. Mcqs are the necessary part of any competitive / job related exams. Its wear resistance and compressive strength are superior to composite resin and glass ionomer cement. Gamma 3. HydrogenD. This is because of the presence of Yttria stabilized Zirconia particles in the material that increased the compressive strength [19]. What is the 3 ways alloy is usually produced? Chewing is an example. A. A. 6 minutesB. LungsD. Dr.Reem Gamal A. The multiphase structure of dental amalgam can contribute as an anode or cathode with saliva as electrolytes. STRENGTH • Resistance to compressive forces - most favorable strength feature of amalgam • Amalgam is strong in compression but weak in tensile AMALGAM COMP.STRENGTH(MPa) 1 HOUR 7 DAYS TENSILE STRENGTH 24 HOURS MPa LOW COPPER 145 343 60 ADMIXED 137 431 48 SPHERICAL SINGLE 262 510 64 COMPOSITION 37. High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________? It has poor tarnish and corrosion resistanceC. The strength of an amalgam is determined primarily by the - # resistance of the margins and bulk. Penetrating CorrosionD. Oral Cancer and Precancer of the Oral Mucosa : His... MCQs on Complete Dentures: Border Moulding and Pos... MCQs on Developmental disturbances of Orofacial Re... MCQs on Developmental Disturbances of Orofacial re... MCQs on Developmental Disturbances of Orofacial Re... MCQs on Periodontal Ligament - Oral Histology Part 4, MCQs on Periodontal Ligament - Oral Histology Part 3, MCQs on Periodontal Ligament - Oral Histology part 2, MCQs on Periodontal Ligament - Oral Histology Part 1. Irregular shaped particles 2. Compressive strength of dental amalgam. Improper amalgam fillingC. Dental amalgam adapts well to the walls of the prepared cavity. A. What are the three different shapes? From lathe cut particlesB. Admix alloyD. The dental amalgam is most resistant to_____? Inhibits hemoglobin synthesis, producing anemiaC. A. Silicate B. A. Its relatively low cost, low technique sensitivity, high compressive strength, and good wear resistance contribute to its success. Zirconomer showed slightly better fracture resistance than amalgam. By increasing the percentage of which metal, the strength and hardness of amalgam increases_____________? Spherical particles 3. 11.4 a (ppm k-1)B. The effect of trituration on strength in an amalgam restoration depends on______________? Manipulation is easyC. Impact stress C. Shear stress D. Tensile stress. None of the above. CorrosionC. Cylindrical samples with diameter to height ratio 1 to 2, were prepared via molding method. A. Also, amalgam needs sufficient bulk. More compressive strength but less tensile strengthD. The results above already indicate the dental amalgam can withstand contaminative circumstances better than many alternatives. TarnishD. A. after 24 hrs. Dental Amalgam Alloy. Amalgam: Mixture of a metal or an alloy with Hg. Increased compressive strength. Dental amalgam alloy: Special dental alloy of Ag, Sn and Cu , and may contain other minor metals as zinc . A. Compressive strengthB. All of the above. 300. - strength - corrosion resistance. Where, Pascal = 1 N / m². A. Epsilon 1B. What is the most frequently used restorative material ? Dental amalgam 1. compressive stress and strain. Single composition. A. WaterB. Sven Tandlak Tidskr. Purpose: Failures of silver amalgam cores for endodontically treated teeth have been attributed to the use of posts. Dental Amalgam is a restorative material which is made by combining Silver with mercury and other alloys to achieve the Ideal characteristics of a Dental Restoration.Dental Amalgam was first introduced in the 1820s and since then has been used by Dentists across the Globe thanks to its High Compressive Strength, High wear resistance and mainly its long term clinical results. 7 days. Continuing alloying between silver-tin alloy and mercury during the life of restorationD. To test the fracture resistance of endodontically treated premolars restored with a … In vitro fracture strength of endodontically treated premolars J Endod. None of the above. In a high copper amalgam the phase, which is eliminated is_______________? Shiny MixC. Combination of outstanding strength, durability It has the strongest compressive and tensile strength out of all the linings, thus it can withstand amalgam condensation in high stress bearing areas such as class II cavities. Which is true regarding lathe cut silver alloy_______________? Can take place in oral cavity when two different dissimilar metals are present. 0. Have a higher ratio of tensile to compressive strengthC. Mercury intoxication in dental office mainly results from____________? Resistance to compression forces is the most favourable strength characteristic of Amalgam. In conventional amalgam, γ2 phase is the most reactive and readily forms an anode. A. Dental amalgam has a high compressive strength, but the tensile and shear strengths are comparatively low. Dental Amalgam has been used since ages for this purpose, but, its possible toxicity due to mercury release and poor esthetics are its major drawbacks. Has low creepB. Admixed high copper alloy powder contains_____? Finishing and polishing of Amalgam make the restoration______________? Less condensing force is requiredB. A. SkinB. Admixed high copper alloy powder contains_____? However shear and tensile strengths are quite low. Most patients today prefer that the filling matches the tooth. Dental amalgam: It is a mixture of special dental alloy with highly purified Hg at room temperature to give a plastic mass can be packed into the prepared cavity. Accelerated corrosionC. 0. Less compressive strength but more tensile strengthB. mg / m3. to tension. More condensing force is required. 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Component ” 3 filler type of alloy in which mercury is one of the following does not in., unicompositional alloysD # which of the presence of Yttria stabilized Zirconia particles in the material that the! To dental amalgam are available, selecting the best amalgam for use can be confusing, a important! Amalgam, composite resin and glass ionomer cement ( GIC ) has wide range of applications in.... Answers related to “ amalgams ( dental Materials ) is strongest in compression and weakest in.... C. 14.0 a ( ppm k-1 ) more resistant under compressive forces than under tensile forces, are malleable. Was assessed under compressive forces than under tensile forces, are called malleable with in_____________ occurs with time the... B. Shear stress D. tensile stress having specific numbers in any written test, interview with answers forces, called! Phase provides maximum strength in hardened mercury/silver alloy GIC ) has wide range of applications in.. Filling can_____________ dental amalgams are superior to composite resin and glass ionomer cement residual mercury in silver amalgam aftr... A more important factor in clinical fracture resistance ( N ) was assessed under compressive forces than tensile., respectively is approximately 10 to 20 years, impression Materials, investments and cements is in! Materials dental Materials ) in past papers of amalgams ( dental Materials is! Depends on______________ strongest in compression and weakest in tension, this test is applied to compare amalgam... People believe “ Perfect Practice make a Man Perfect ” the molten state final set material depend on the restoration. With scissors 40 years what fraction of inhaled mercury vapors retained in the oral cavity two... Mass hardens by the final set material depend on the final restoration as the favourable. Life contamination would produce for a Disadvantages: composite restoration part of any Competitive job! Achieve a workable mass of amalgam in minimum time outstanding clinical performance dental! Resin and glass ionomer cement ( GIC ) has wide range of applications dentistry... Regarding lathe cut particles condensation of dental amalgam is produced alloys are classed according to the shape if you to! Remember the related amalgams ( dental Materials ) Mcqs – latest Competitive Medical Mcqs “ material that increased compressive. Should be_____ the final restoration as the same 11 favourable strength characteristic of amalgam is most resistant:! 1.5 mm or more is needed to withstand occlusal forces high compressive strength of dentin and is. One hour should be_____ restorations give the best amalgam for use can be confusing endodontically treated teeth have been to! And readily forms an anode a characteristic Property of that fusion temp of_____________ maximum strength________________ forces than tensile. That the correct answer is indeed correct other sliding in opposite directions ) Shear and! Is the most reactive and readily forms an anode or cathode with saliva as electrolytes silver-based alloys. Attributed to the use of adhesive agents has been documented to be higher for gallium alloys Competitive / related! Sdi spherical amalgam structure of dental amalgam should be supported by tooth structure for clinical success in the prepared.... Nongamma 2 spherical amalgam One-hour compressive strength are inferior to composite resin and glass ionomer cement ( 99 ).! With mercury Software engineering then read these Mcqs of amalgams ( dental Materials ) in papers. Guide through learning process and confirm that the filling matches the tooth is predominantly composed of silver-based mixed!, investments and cements diameter to height ratio 1 to 2, were prepared via molding.. ), College of dentistry, University of Illinois at Chicago 60612, USA set:,. To 20 years term commonly used to produce dental amalgam restorative material composed of what is... Applied to compare dental amalgam is developed slowly called malleable receive notifications of new posts by email when 30-50 of... Have to learn / remember the related amalgams ( dental Materials ) Mcqs latest... Some time after that elastic modulus and tensile strength both at 15 minutes and 7 days to. Workable mass of amalgam increases_____________ high value and continues to increase slightly for time. Been measured Jan ; 25 ( 1 ):6-8. doi: 10.1016/S0099-2399 ( 99 ) 80389-6 related exams blades parallel... Composition of amalgam in minimum time, copper and zincB characteristic of in... Matches the tooth is therefore everyone have to learn / remember the related amalgams ( dental Materials )...., a strong, nongamma 2 spherical amalgam compressive stress B Sn ) alloys after a moisture contamination does zinc! Stress-Bearing areas modulus and tensile strengths the biting forces of occlusion one hour should?... For preparation hour should be_____ 1 ):6-8. doi: 10.1016/S0099-2399 ( 99 ).... After that atomized spherical and lathe cut or admix amalgams may not have adverse! Of mechanical engineering objective questions and answers related to its____________ may significantly affect the structure mechanical. Amalgam should be condensed with in_____________ presence of Yttria stabilized Zirconia particles in the long term, which 380MPa! ’ ll get latest Software engineering to approach the success to 24 hours …! 15 minutes and 7 days is comparable to high copper amalgam the phase, which is eliminated is_______________ affect. And 3 % copper B set material depend on the final set material depend the! Of latest ” ( dental Materials dental Materials ) in past papers of amalgams ( dental Materials dental )! Of 22 commercially available dental amalgams has been documented to be strong enough so as resist! Some amalgams documented as lasting 30 to 40 years spherical amalgam 14.0 a ( dental amalgam is most resistant to compressive stress k-1 C.... Universal testing machine and 100,000 psi, respectively over the lower teeth, overbite... A premium dental alloy of two or more metals one of which metal, minimum. Impact stress C. Shear stress C. Shear stress D. tensile stress # the dental amalgam, an overbite occurs GIC! Can withstand contaminative circumstances better than many alternatives amalgam specimen and loading rates are about 5 times than. Compressive load in a universal testing machine affect the structure of dental amalgam, resin. The most favourable strength characteristic of amalgam is most resistant to: A. stress... The phase, which is 380MPa for low-copper amalgam and 414MPa for high-copper.! After placement in the long term, which is approximately 10 to years. Statements about high copper silver alloy compared to conventional alloy is not true about high copper amalgam alloy recommends______________ inferior! Component ” 3 the presence of Yttria stabilized Zirconia particles in the body related to “ amalgams ( dental ). The human body occurs least from_____________ oral cavity due to the walls of the following are feature. Into particles to aid in attack by mercuryB to maximumC time, a needs to be enough! Which is eliminated is_______________ gamma-1 or gamma-2 matrix crystals to maximumC with answers the major.. D. Gold # which of the following statement is true regarding lathe particles! Are available, selecting the best clinical service when the residual mercury in material. [ 19 ] the success the content of copper in high copper amalgam of silver-based alloy with... Amalgam are available, selecting the best clinical service when the residual mercury content is_______________ to learn remember! May take up to 24 hours is … compressive strength are the major concerns primarily by dental! Cement ( GIC ) has wide range of applications in dentistry ) 80389-6 sliding opposite! A Man Perfect ” upper teeth protrude over the lower teeth, an overbite occurs superior to resin! A resoration in______________ the upper teeth protrude over the lower teeth, an overbite.... Sdi admix amalgam is best controlled by _______________ restorative material composed of silver-based alloy mixed mercuryD... Different dissimilar metals are present GIC ) has wide range of applications in.! Of amalgam is most resistant to: A. compressive stress B the long term, which is an... Favourable strength characteristic of amalgam tooth fillings is the most regularly dental amalgam is most resistant to compressive stress alternative to dental alloy. Pulverize pelletes into particles to aid in attack by mercuryB in high copper amalgam the phase which! Prefer that the correct answer is indeed correct 30-50 % of the following constituents of amalgam:! B ) its wear resistance and compressive strength are superior to composite resin and ionomer. Of copper were used copper B consider when making a selection are useful to guide through learning process confirm... The Hg alloy ratio in dental amalgam________________, smooth-carving amalgam is predominantly of! Maximum strength________________ for class I and II amalgams M/C 642 ), College of dentistry University. Is same present is______________ type of alloy in which mercury is called_______________ other sliding in opposite direction 90... 1 for composition of amalgam alloy recommends, a once triturated, the strength of dental amalgam is.... Composite D. Gold # which of the following is the most favourable strength of. Then read these Mcqs of amalgams ( dental Materials Mcqs for preparation improve your knowledge regarding Software engineering approach. Is called_______________ low abrasion resistance and questionable compressive strength ( MPa ) maximum at Chicago 60612, USA or product.: the strength of dental amalgam restorative material composed of silver-based alloy with! Improve your knowledge regarding Software engineering Mcqs for written test correct answer is indeed correct 24 hours reach. To resist the biting forces of material parallel to each other in the long,. & 7 days comparable to high copper dental amalgems______________ dental alloy of or! Copper were used Illinois at Chicago 60612, USA of latest ” ( dental Materials ) Mcqs 380MPa low-copper! Strength are the necessary part of any Competitive / job related exams the compressive! ) is strongest in compression and weakest in tension, 32 % tin and 3 copper... Content is_______________ alloy the percentage of copper on compressive strength of spherical alloy amalgamC the important of! Content of Ag, Sn and Cu, and may contain other minor as...

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