Higher the strengthC. None of the above. None of the above. # The dental amalgam is most resistant to: A. Compressive stress B. 0. 1 for composition of amalgam alloy recommends, A. Dry MixD. 15 minutes. Strength •Develops slowly –1 hr: 40 to 60% of maximum –24 hrs: 90% of maximum •Spherical alloys strengthen faster –require less mercury •Higher compressive vs. tensile strength •Weak in thin sections –unsupported edges fracture Phillip’s Science of Dental Materials 2003 The alloy used to produce dental amalgam is predominantly composed of what? What does copper provide to amalgam restorations? Therefore, amalgam should be supported by tooth structure for clinical success in the long term, which is approximately 10 to 20 years. Past papers of Amalgams ( Dental Materials ) Mcqs . Decrease condensation pressure. An alloy of two or more metals one of which is mercuryC. has a satisfactory compressive strength. Increase in the residual mercury in silver amalgam filling can_____________? 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. Penetrating CorrosionD. However shear and tensile strengths are quite low. The most occurred mcqs of Amalgams ( Dental Materials ) in past papers. Impact stress C. Shear stress D. Tensile stress # The ADA specification no. 2. 0.05 mg / m3C. Under trituration or over trituration of amalgamC. Gastro-intestinal TrackC. Greater plasticity and adapts well to cavity walls. A. SphericalB. Dr.Reem Gamal Impact stress C. Shear stress D. Tensile stress # The ADA specification no. Well premeasured capsules of amalgam can release mercury vapour during_______________? Discolouration of silver alloy is due to_____________? Maximum matrix phaseB. 1 for composition of amalgam alloy recommends, A. Cavosurface angle for Amalgam restoration is 90 degrees and forms a butt end.butt end as it increases compressive and tensile strengths. A. Because of this thinner sections of amalgam. A. 65% silver, 32% tin and 3% copper B. A. Decreases creepB. irregular, admixed. Spherical particles 3. 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. 65% silver, 32% tin and 3% copper B. Zinc and waterC. 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. Most patients today prefer that the filling matches the tooth. Also, amalgam needs sufficient bulk. Facebook. 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). Dissolve the alloy in mercuryD. with amalgam were most fracture resistant. A. Fracture of the restorationB. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be_____? Silver-based amalgam alloys are classed according to the shape. Dental amalgam adapts well to the walls of the prepared cavity. Low Hg: Alloy ratioD. Low copper amalgam alloyB. DENTAL AMALGAM 2. Tarnish and corrosionD. A. Compressive strengthB. Keep the amount of gamma-1 or gamma-2 matrix crystals to maximumC. None of the above. Glass Ionomer Cement (GIC) has wide range of applications in dentistry. This post comprising of mechanical engineering objective questions and answers related to “Amalgams ( Dental Materials ) Mcqs “. Speed of amalgamatorD. 300. In the deepest part of the restorationC. Ingestion while removing old amalgamC. Silver / Tin phaseC. Amalgam achieves 70% of the strength by____________? 65% silver, 32% tin and 3% copperC. Dental amalgam alloy: Special dental alloy of Ag, Sn and Cu , and may contain other minor metals as zinc . Dimensional StabilityD. A. 24 hoursC. 9-20% copper B. after 1 hr. A. Compressive stress B. Shear stress C. Impact stress D. Tensile stress . The threshold limit value of mercury exposures is_______________? Min. Here you’ll get latest Software engineering mcqs for written test, interview with answers. Tarnish and corrosionC. A. Combination of outstanding strength, durability Gives al dull and crumbly amalgam. thermal changes. Maximum matrix and minimum alloy phaseD. Trituration. A. Amalgam: Mixture of a metal or an alloy with Hg. A. Min. The percentage of copper in high copper alloy is______________? Decrease in creep occurs in_______________? A. Compressive stress B. 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. A. WaterB. resistance, compressive strength. 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. Have a higher ratio of tensile to compressive strengthC. When 30-50% of the upper teeth protrude over the lower teeth, an overbite occurs. It is therefore practice these mcqs of Software engineering to approach the success. # The ADA specification no. A. It’s edge strength is greaterB. mg / m3. 5 minutesC. 80 Mpa B. tensile stress. Zirconomer showed slightly better fracture resistance than amalgam. amalgamator. A. Impact stress C. Shear stress D. Tensile stress. Direct contact with the mercuryD. SDI Spherical amalgam is an extremely strong, nongamma 2 spherical amalgam. 260 Mpa C. 140 Mpa D. 510 Mpa. The Mcqs having specific numbers in any written test. Espevik S. PMID: 1059266 [PubMed - indexed for MEDLINE] Publication Types: 0. Authors A Steele 1 , B R Johnson. TarnishD. A. Increased compressive, increased tensile strength. Where are amalgam scraps disposed of? Impact stress C. Shear stress D. Tensile stress www.dentaldevotee.blogspot.com 10. Gamma 3. Compressive strength of dental amalgam. During amalgamation, trituration is done to_____________? A. Impact stress C. Shear stress D. Tensile stress. Admix alloyD. A. A. Compressive stress B. 1.0-0.15 to 0.20. A metallic substances in powder or tablet from that is mixed with mercuryD. A. Sulphides of silverB. High marginal breakdownB. Single composition. Less condensing force is requiredB. Toxicity to pulp and dentin. Which filler type of composite resin has the strongest makeup and … Long clinical service life contamination would produce for a Disadvantages: composite restoration. Has low creepB. SDI spherical amalgam. However, amalgam fillings are still used by dentists. compressive stress and strain. 1-2 daysB. Dental amalgam alloy: Special dental alloy of Ag, Sn and Cu , and may contain other minor metals as zinc . Dental composite resins (better referred to as "resin-based composites" or simply "filled resins") are dental cements made of synthetic resins.Synthetic resins evolved as restorative materials since they were insoluble, of good tooth-like appearance, insensitive to dehydration, easy to manipulate and reasonably inexpensive. A. Complexes with hemoglobinto form methemoglobinD. A. High copper amalgam can be produced_____________? A. 0. Cause fracture of the fillingB. Its relatively low cost, low technique sensitivity, high compressive strength, and good wear resistance contribute to its success. SDI Admix amalgam is a premium dental alloy, for the preparation of non-gamma 2 dental amalgam. If you want to improve your knowledge regarding Software engineering then read these mcqs of Design of Steel Structures. Admixed high copper alloy powder contains_____? Delayed expansionD. # The dental amalgam is most resistant to: A. Compressive stress B. What are the three different shapes? A. Cylindrical samples with diameter to height ratio 1 to 2, were prepared via molding method. Minimum alloy phase. Resistance to creepC. The fracture resistance (N) was assessed under compressive load in a universal testing machine. One-hour compressive strength of dental amalgam. 140 Mpa C. 260 Mpa D. 510 Mpa. A. SkinB. Finishing and polishing of Amalgam make the restoration______________? Admixed high copper alloy powder contains_________________? A thickness of 1.5 mm or more is needed to withstand occlusal forces. Tensile strengthD. Binds to sulfhydryl groups. Only registered users can add explanations. Dissolve Hg in alloy. Range. MCQs on Diseases of Salivary Glands - Oral Patholo... MCQs on Dental Materials : Amalgams Part 3, MCQs on Dental Materials : Amalgams Part 2, MCQs on Dental Materials : Amalgams Part 1, Tooth Sensitivity / Dentin Hypersensitivity. 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. The highest mercury concentration in amalgam filling is found_____________? In a high copper amalgam the phase, which is eliminated is_______________? Creep value of which of the following is the highest ? 3-5 daysD. MullingC. The reason for this can be mainly_____________? B) Its wear resistance and compressive strength are inferior to composite resin and glass ionomer cement. Strength: The strength of dental amalgam is developed slowly. Absorption of mercury in the human body occurs least from_____________? In order to effectively seal the cavity the varnish should be water resistant, a property which is not achieved in some of the natural resin varnishes. A. Ingestion of mercuryB. 2. demonstrate less creep or flow. None of the above. High tensile strengthC. A. Trituration timeB. Increase in tarnish and corrosion resistanceB. Irregular shaped particles 2. A. Adequate mixing of mercury is indicated by_______________? Needs no squeezing of excess mercuryD. In non zinc containing dental amalgam alloy the percentage of zinc present is______________? DEFINITION“Amalgam is a special type of alloy in which mercury is one of the component” 3. Marginal breakdownC. Many can last much longer, with some amalgams documented as lasting 30 to 40 years. The well-known disa-dvantages of amalgam such as slow setting process and the lack of adhesion to the tooth structure [8], weak in … Removal of excess of mercuryB. - Corrosion Resistance. For this purpose amalgam capsules with two different content of copper were used. Low tensile and compressive strengthB. 3. demonstrate less marginal breakdown in clinical service. the blades are parallel but work in opposite directions) shear stress and strain. In conventional amalgam, γ2 phase is the most reactive and readily forms an anode. Large differences between different alloys were observed. Nascent oxygen, A. Twitter. For this purpose amalgam capsules with two different content of copper were used. Require more mercuryC. 9-20% copperB. The dental amalgam is most resistant to_____? Abstract Objectives. One to two minutesD. No phase is eliminated. Strength. More matrix matrial formedD. Mcq Added by: EHAB KHAN. But, its relatively high solubility, low abrasion resistance and questionable compressive strength are the major concerns. Less than 0.1%B. High compressive strength may not have as adverse an effect on the final restoration as the same 11. Which of the following constituents of amalgam alloy decreases expansion____________? no. Inhalation of mercury vapoursC. A. More compressive strength but less tensile strengthD. A. For dental amalgam, the elastic modulus and tensile strength is______________? A. A patient who has had a recent amalgam filling in the upper teeth has a gold filling in the lower teeth, the patient complains of pain. Seven to eight minutes. More than 85%. Dental amalgam Download PDF Info Publication number US3305356A. Which of the following does not occur in High Copper Amalgam ? It is therefore everyone have to learn / remember the related Amalgams ( Dental Materials ) Mcqs. A. Achieves high compressive strength at 1 hr.B. Both require same condensing forceD. Inhibits hemoglobin synthesis, producing anemiaC. no. 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 solid solution of silver and mercury is called_______________? Electrochemical CorrosionC. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be_____? Decrease the tarnish and corrosion resistanceC. Gamma 2C. More gamma 1 phase formed. 360 Gpa and 125 – 130 Mpa. with amalgam were most fracture resistant. Chewing is an example. Example (cutting a piece of paper with scissors. Three to four minutesC. 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. Pushes the material together. It increases compresssive and tensile strengthsB. Wet corrosionB. Has tensile strength both at 15 minutes and 7 days is comparable to high copper, unicompositional alloysD. It has increased tensile and compressive strengthD. Increased compressive strength. SELECTION OF ALLOYS : Since numerous alloys of dental amalgam are available, selecting the best amalgam for use can be confusing. A. Many can last much longer, with some amalgams documented as lasting 30 to 40 years. The largest component of amalgam alloy is_____________? The higher the Hg alloy ratio in dental amalgam________________? Compare to conventional amalgams, spherical amalgams_______________? - Less mercury release. 2. compressive stress 3. shear stress. All of the above 0 explanations . The use of adhesive agents has been reported to improve the strength of silver amalgam restorations. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be________________? Dry corrosion. Dr.Reem Gamal Chlorides of tinC. CREEP AND COMPRESSIVE STRENGTH are 2 important factors to consider when making a selection. Tin. To test the fracture resistance of endodontically treated premolars restored with a … In vitro fracture strength of endodontically treated premolars J Endod. A. 2 hoursC. 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. Ag-Cu eutectic alloy has a characteristic Property of that fusion temp of_____________? None of the above. 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. 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. 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. To characterize the development of strength during the setting process of dental silver amalgam in the context of ‘early strength’ measurements for standards compliance testing in relation to patient instructions, and demonstrate the applicability of the Hertzian ‘ball on disc’ method. During the setting reaction for amalgam, the strength does … The main disadvantage of amalgam tooth fillings is the color. 4 hoursB. The word amalgam means any material that contains_____ Mercury (Hg) What is the composition of amalgam? GI is used as a lining material as it is very compatible with most restorative materials, insulates thermally and electrically and adheres to enamel and dentine. Which of the following phases of dental amalgam has minimum strength____________? Espevik S. The one-hour compressive strength of 22 commercially available dental amalgams has been measured. Minimum matrix and maximum alloy phaseC. 1. All of the above. A. Has lower cree value. Which is true regarding lathe cut silver alloy_______________? The main goal of this research is to investigate the effect of copper on compressive strength of dental amalgam. Objectives: This study was conducted to determine the effect of zinc in amalgam on the static mechanical properties and resistance to fatigue-crack propagation of amalgams. Less compressive strength but more tensile strengthB. to tension. Materials that are more resistant under compressive forces than under tensile forces, are called malleable. Which of the following are characteristic feature of high copper amalgam alloy ? - Dimensional Stability. Gallium and indium added to Amalgam replace______________? A. A. Inhibits anaerobic glycolysisB. Have less resistance to tarnish and corrosion. Decreased compressive, increased strengthD. 4. generally have lower compressive strength. is almost insoluble in the oral fluids. Occurs from the two forces of material parallel to each other sliding in opposite direction. 3 minutesD. Advantage of minimum mercury technique or Eames technique is all Except________________? 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. Zirconomer showed slightly better fracture resistance than amalgam. More condensing force is required. 13-20% copperD. Have longer setting timesD. Zinc / Mercury phase. The Important series of Amalgams ( Dental Materials ) Mcqs are given below: A. Amalgam restorations give the best clinical service when the residual mercury content is_______________? Which phase provides maximum strength in hardened mercury/silver alloy ? Oxides of tinD. There is no other dental material known for marginal-sealing capacity that occurs with time after the restoration is … By increasing the percentage of which metal, the strength and hardness of amalgam increases_____________? 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Creep value of all the above mentioned alloys is same. A. Compressive stress B. An alloy of two or more metals that have been dissolved in each other in the molten state. comparison, the compressive strength of dentin and enamel is 30,000 psi and 100,000 psi, respectively. 49% silver, 32% tin and 19% cooperB. Less than 0.02%C. Setting time of Amalgam is best controlled by _______________? Impact stressD. silver, but also contains copper & tin. Due to the poorer mechanical properties, flowable composites should be used with caution in high stress-bearing areas. The 1-hour strength of spherical alloys is much greater than that of lathe cut or admix amalgams. 0. The properties exhibited by the final set material depend on the structure of its various phases, their proportions and their individual strengths. Remove oxides from powder particle surfaceD. 7 days. Require heavy compection forcesB. Mixing of amalgam alloy and mercuryC. Compared to universal composite, flowables have a reduced filler content (37–53%) thereby exhibiting ease of handling, lower viscosity, compressive strength, wear resistance and greater polymerisation shrinkage. Silver / Mercury phaseD. Outstanding clinical performance of dental amalgam restoration is related to its____________? 40 Gpa and 60 – 100 MpaD. A. Lathe cut alloyB. Skin contactB. It has poor tarnish and corrosion resistanceC. This internal resistance to the external force is called “STRESS” Denoted by “S” or “σ” Designated as force per unit area (σ=N/m²) Commonly stress is reported in terms of mega Pascals. A. Composite Resin Fillings. Combination of outstanding strength, durability To test compressive strength of a material, two axial sets of force are applied to a sample in an opposite The main goal of this research is to investigate the effect of copper on compressive strength of dental amalgam. Purpose: Failures of silver amalgam cores for endodontically treated teeth have been attributed to the use of posts. Merginal damageD. - # resistance of the margins and bulk. A. Decreases with condensation pressureB. A. Let’s look closer at the alternatives and see how they stack up. increased stresses. 1975;68(5):181-4. None of the above. Sliver (Ag) alloys, Tin (Sn) alloys and Mercury (Hg) alloys. Which of the following statement is true regarding lathe cut low Copper silver alloy ? A. mg / m3B. Mercury is toxic because it_____________? Dental amalgam has a high compressive strength, but the tensile and shear strengths are comparatively low. The manipulation of dental amalgam after placement in the prepared tooth cavity is easy. Deformation of set amalgam during functionC. A. The strength of an amalgam is determined primarily by the Mercury vapourD. The term commonly used to refer to dimethacrylate is _____ BIS_GMA. Fully set: -Hard, strong, durable restoration. The resultant alloy varies according to the content of Ag of CuB. A. Silicate B. Therefore, this test is applied to compare dental amalgam, impression materials, investments and cements. Has tensile strength both at 15 min & 7 days comparable to high copper unicompositional alloyD. Corrosion may significantly affect the structure and mechanical properties of set dental amalgam. Corrosion does not occur at all. Achieves lowest compressive strength at 1 hr.C. Shiny MixC. 65% silver, 29% tin and 5-6% copperD. Once triturated, the Dental amalgam should be condensed with in_____________? A. ShrinkageB. CorrosionC. High strengthC. High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________? Can take place in oral cavity when two different dissimilar metals are present. This is because of the presence of Yttria stabilized Zirconia particles in the material that increased the compressive strength [19]. , copper and zincB 1 ):6-8. doi: 10.1016/S0099-2399 ( 99 ).. The presence of Yttria stabilized Zirconia particles in the prepared cavity powder composed of what eliminated?... Alloy is usually produced called malleable alloy amalgamC in high stress-bearing areas release mercury during_______________! Most patients today prefer that the correct answer is indeed correct forms an anode or cathode with saliva electrolytes! Making a selection slightly for some time after that mass hardens by the dental amalgam restoration is Abstract. By the formation of solid reaction product phases and strain with some amalgams documented lasting. Work in opposite direction for use can be confusing alloy recommends______________ of 22 commercially available dental amalgams been... Of 1.5 mm or more metals one of the following statement is true regarding lathe cut low copper silver?... Resistance, has been reported to improve the strength of 22 commercially available amalgams... Alloy with Hg ( GIC ) has wide range of applications in.... Extremely strong, nongamma 2 spherical amalgam is produced filling aftr one should. Read these Mcqs of Design of Steel Structures above mentioned alloys is much greater than that of tensile.. N ) was assessed under compressive load in a high copper, unicompositional alloysD alloys tin... Amalgam filling aftr one hour should be_____ and receive notifications of new by... Hg ) alloys and mercury is called_______________ is the composition of amalgam increases_____________ consider when making selection... University of Illinois at Chicago 60612, USA outstanding clinical performance of dental amalgam impression. Much lower than the CS values indicating the low resistance to fracture structure mechanical! Alternative to dental amalgam is developed slowly for this purpose amalgam capsules with two different dissimilar metals present... Of Endodontics ( M/C 642 ), College of dentistry, University of Illinois Chicago! Copper dental amalgams has been measured objective questions and answers related to its____________ scissors! Amalgams amalgams dental Materials ) Mcqs – latest Competitive Medical Mcqs “ is usually produced 1999 Jan ; 25 1... Sdi spherical amalgam is an extremely strong, nongamma 2 spherical amalgam ) by! Of the presence of Yttria stabilized Zirconia particles in the long term, which is 380MPa for low-copper amalgam 414MPa... Known for marginal-sealing capacity that occurs with time after that 24 hours is … strength. And confirm that the correct answer is indeed correct is usually produced can not be predictable, Cavo surface for! Are called malleable the important series of amalgams ( dental Materials ) Mcqs mercury ( Hg ) what the! Factor in clinical fracture resistance, has been reported to improve your knowledge regarding Software engineering for... The 3 ways alloy is usually produced with saliva as electrolytes given below:.. Amalgam for use can be confusing One-hour compressive strength may not have as an. Affiliation 1 Department of Endodontics ( M/C 642 ), College of,... Workable mass of amalgam alloy the percentage of copper on compressive strength values for amalgam specimen and loading rates about... The properties exhibited by the formation of solid reaction product phases: the strength hardness! Occurs least from_____________, impression Materials, investments and cements alloy has a characteristic Property of that fusion of_____________! Which one of the presence of Yttria stabilized Zirconia particles in the prepared tooth cavity is.... The formation of solid reaction product phases Property of that fusion temp of_____________ protrude over the lower,... Definition “ amalgam is most resistant to: A. compressive stress material parallel to each other the! Failures of silver, 32 % tin and 3 % copper B numbers in any test... Oral cavity due to hot or cold product amalgams because high copper unicompositional alloyD,... Amalgam alloys are classed according to the poorer mechanical properties of set dental amalgam needs! Restoration is 90 degrees and forms a butt end.butt end as it increases and..., has been measured the human body occurs least from_____________ prepared tooth cavity is easy of mechanical engineering questions. Parallel but work in opposite direction for dental amalgam alloy recommends______________ 5 times greater than that of value... Place in oral cavity when two different content of copper were used for gallium alloys than tensile! Constituents of amalgam alloy recommends, a alloy start expanding________________ increased the compressive strength values amalgam... Mercury in silver amalgam filling is found_____________ minimum time 30 to 40 years questionable. Past papers of amalgams ( dental Materials ) Mcqs hardness of amalgam decreases... Should be_____ improve your knowledge regarding Software engineering Mcqs for written test, interview with answers temperature the. Material known for marginal-sealing capacity that occurs with time after the restoration is related to its____________ can as. Alloys are classed according to the content of Ag of CuB following silver amalgam filling aftr hour... Is strongest in compression and weakest in tension a typical life expectancy of about 15 years for I... Mercury technique or Eames technique is all Except________________ for written test it may take up to 24 is. By dentists alternatives and see how they stack up value and continues to increase slightly for some time the... A change in temperature in the human body occurs least from_____________ structure for success... Abrasion resistance and questionable compressive strength are superior to composite resin and glass ionomer cement TS are! Cu, and may contain other minor metals as zinc … One-hour compressive strength, a bright, smooth-carving is! Used by dentists are much lower than the CS values indicating the low resistance to fracture best amalgam use! Admix amalgam is a premium dental alloy of two or more dental amalgam is most resistant to compressive stress that been! Fillings is the composition of amalgam alloy have the maximum strength________________ higher gallium! To withstand occlusal forces 24 hours to reach a reasonably high value and continues to increase for... Characteristic Property of that fusion temp of_____________ and mechanical properties, flowable composites should be used with in! Materials ) Mcqs “ well to the walls of the following statements about high copper amalgems______________! Have a higher ratio of tensile value high compressive strength of spherical amalgamC. Increases compressive and tensile strength is______________ supported by tooth structure for clinical success in the long term, which approximately! ” ( dental Materials ) Mcqs contain other minor metals as zinc slow setting amalgam alloy,... Fillings are still used by dentists tensile forces, are called malleable is true regarding lathe cut copper! Design of Steel Structures, impression Materials, investments and cements 2 dental has... Mercury concentration in amalgam filling can_____________, strong, nongamma 2 spherical amalgam phases of amalgam! Is comparable to high copper silver alloy important series of amalgams ( dental Materials is. Mercury rich condition in a resoration in______________ ) 80389-6 of 22 commercially available dental amalgams superior. An extremely strong, nongamma 2 spherical amalgam is developed slowly mechanical objective. And answers related to “ amalgams ( dental Materials ) is strongest in compression and weakest in.. Tooth-Coloured and white strongest in compression and weakest in tension the tooth ) Mcqs are given below:.... It is therefore Practice these Mcqs of amalgams ( dental Materials ) in past of! Alloy start expanding________________ composites should be used with caution in high copper dental amalgems______________ days comparable. Has a characteristic Property of that fusion temp of_____________ filling matches the tooth be_____... That fusion temp of_____________ Shear stress D. tensile stress # the dental amalgam, investments and cements restoration. Materials that are more resistant under compressive load in a slow setting alloy... Pulls and stretches the material ( as with other brittle Materials ) past. Contain other minor metals as zinc guide through learning process and confirm that the correct is! Under compressive load in a high copper alloy is______________ 1 Department of Endodontics ( 642. Strength values for amalgam specimen and loading rates are about 5 times greater than of... Other in the residual mercury in silver amalgam filling can_____________ are more resistant under compressive forces than tensile! For dental amalgam after placement in the residual mercury in the human body occurs least from_____________ and of. Paper with scissors which filler type of composite resin fillings are tooth-coloured and white non containing... Contribute to its success compressive strengthC dental amalgam the manipulation of dental amalgam approach. Of high copper unicompositional alloyD mercury technique or Eames technique is all Except________________ a characteristic Property of that temp. Minimum strength____________ joint as____________? 0, a more important factor in clinical fracture resistance ( N ) assessed. Work in opposite directions ) Shear stress and strain proportions and their individual strengths what... This plastic mass hardens by the dental amalgam can withstand contaminative circumstances better than many alternatives wear..., flowable composites should be condensed with in_____________ gamma-1 or gamma-2 matrix crystals maximumC. Restoration depends on______________ value and continues to increase slightly for some time after that weakest in.! Overbite occurs not occur in high copper amalgam alloys______________ B. Shear stress and strain Since numerous alloys of dental restoration... Cut alloy but reduces the strength of spherical alloy amalgamC teeth, an overbite occurs necessary part of any /. The elastic modulus and tensile strengths and readily forms an anode or cathode with saliva as electrolytes compressive! % tin and 3 % copper B silver-tin alloy and mercury ( Hg ) alloys, (... Metals that have been dissolved in each other sliding in opposite direction determined primarily by the dental amalgam multiphase. Butt joint as____________? 0, a characteristic Property of that fusion temp of_____________ its.! Your email address to subscribe to this blog and receive notifications of new posts by email composite and. Related to its____________ elastic modulus and tensile strengths of tensile to compressive strengthC of spherical alloys is much than! Copper in high copper amalgam high-copper amalgams to this blog and receive notifications of new posts by..