dental amalgam is most resistant to compressive stress

Under trituration or over trituration of amalgamC. The purpose of this study was to test the effects of two adhesive agents on the fracture resistance of silver amalgam cores with and without a post. A. Ingestion of mercuryB. Which of the following does not occur in High Copper Amalgam ? 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. 65% silver, 32% tin and 3% copper B. ... Its wear resistance and compressive strength are superior to composite resin and glass ionomer cement. A. Decreases with condensation pressureB. The word amalgam means any material that contains_____ Mercury (Hg) What is the composition of amalgam? B) Its wear resistance and compressive strength are inferior to composite resin and glass ionomer cement. TarnishD. 1.0-0.15 to 0.20. Inhalation of mercury vapoursC. 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. 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. It may take up to 24 hours to reach a reasonably high value and continues to increase slightly for some time after that. Increase the strengthC. Requires least amount of mercury. Mercury is toxic because it_____________? 55-65%B. A. Process whereby alloy is wetted by mercuryB. Example (cutting a piece of paper with scissors. Decreased compressive, increased strengthD. 260 Mpa C. 140 Mpa D. 510 Mpa. compressive stress and strain. A. None of the above. Amalgam restorations give the best clinical service when the residual mercury content is_______________? 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. A. Achieves high compressive strength at 1 hr.B. is the breakdown of the material. Less compressive strength but more tensile strengthB. Mercury content in the final restoration is less. Increased compressive, increased tensile strength. A. mg / m3B. Dental MCQs - Multiple Choice Questions in Dentistry, Download All Books In Dentistry Free - Dentosphere, MCQs on Complete Dentures: Border Moulding and Posterior Palatal Seal - Prosthodontics, MCQs in Prosthodontics - Major and Minor Connectors - Removable Partial Dentures, MCQs on Removable Partial Dentures : Introduction and Classification, MCQs in Endodontics - Diseases of the Pulp and Periradicular Tissues, MCQs on Complete Dentures : Impression Procedures, Dental Materials MCQS - Physical Properties, Dental Materials MCQs - Impression Materials, MCQs in Endodontics - Anatomy of Pulp Canal. A. Sulphides of silverB. More compressive strength but less tensile strengthD. Dental amalgam has been used in dentistry for more than 150 years, and is considered a highly successful restorative material. 65% silver, 29% tin and 5-6% copperD. Dissolve Hg in alloy. A. As the most regularly used alternative to dental amalgam, composite resin fillings are tooth-coloured and white. Occurs from the two forces of material parallel to each other sliding in opposite direction. 80 Mpa B. Cavosurface angle for Amalgam restoration is 90 degrees and forms a butt end.butt end as it increases compressive and tensile strengths. 65% silver, 32% tin and 3% copper B. Mcq Added by: EHAB KHAN. Increase the marginal strengthD. It is therefore everyone have to learn / remember the related Amalgams ( Dental Materials ) Mcqs. Increase in the residual mercury in silver amalgam filling can_____________? 11.4 a (ppm k-1)B. Direct contact with the mercuryD. The resultant alloy is lesserC. Greater plasticity and adapts well to cavity walls. Amalgam C. Composite D. Gold # Which of the following constituents of amalgam alloy decreases expansion? No phase is eliminated. The material (as with other brittle materials) is strongest in compression and weakest in tension. 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. Espevik S. PMID: 1059266 [PubMed - indexed for MEDLINE] Publication Types: The main goal of this research is to investigate the effect of copper on compressive strength of dental amalgam. These Mcqs are helpful for Medical students. Where, Pascal = 1 N / m². Dissolve the alloy in mercuryD. Therefore, amalgam should be supported by tooth structure for clinical success in the long term, which is approximately 10 to 20 years. The material (as with other brittle materials) is strongest in compression and weakest in tension. 13-30% copper. Cylindrical samples with diameter to height ratio 1 to 2, were prepared via molding method. None of the above. 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. 6.6 a (ppm k-1)C. 14.0 a (ppm k-1)D. 25.0 a (ppm k-1). 3-5 daysD. A. Tin / Mercury phaseB. 16 hours. There is no other dental material known for marginal-sealing capacity that occurs with time after the restoration is … Which of the following are characteristic feature of high copper amalgam alloy ? Compressive Strength (MPa) Maximum. Reduces contractionD. Tarnish and corrosionC. Both require same condensing forceD. 0. Dental amalgam has high compressive strength, which is 380MPa for low-copper amalgam and 414MPa for high-copper amalgams. All of the above. Once triturated, the Dental amalgam should be condensed with in_____________? Before the mercury (Hg) is mixed in with the Sliver(Ag) & Tin (Sn) it is refered to as. The resultant alloy is greaterD. Impact stress C. Shear stress D. Tensile stress. An alloy of two or more metals that have been dissolved in each other in the molten state. The properties exhibited by the final set material depend on the structure of its various phases, their proportions and their individual strengths. 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. Here you’ll get latest Software engineering mcqs for written test, interview with answers. Copper content in low copper amalgam is________________? Its relatively low cost, low technique sensitivity, high compressive strength, and good wear resistance contribute to its success. 4 hoursB. Ingestion while removing old amalgamC. SDI Spherical amalgam is an extremely strong, nongamma 2 spherical amalgam. Gamma 1D. CondensationD. Setting time of Amalgam is best controlled by _______________? 49% silver, 32% tin and 19% cooperB. 9-20% copper B. 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. 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. 45-55%C. 0. None of the above. Admixed high copper alloy powder contains_____? Gamma 2C. What is used to triturate capsulated dental materials? 3 minutesD. # The dental amalgam is most resistant to: A. Compressive stress B. Because of this thinner sections of amalgam. The material has low creep, high compressive strength, and high resistance to wear, and it experiences minimal dimensional change with time (George et al., 2009; ADA, 2011; Uçar and Brantley, 2011). To test the fracture resistance of endodontically treated premolars restored with a … In vitro fracture strength of endodontically treated premolars J Endod. to tension. A. CarvingB. METHODS: The silver specimens were made by pressing a precipitated powder at room temperature with a pressure of 150 MPa, which can be achieved in clinical hand-consolidation. A. Dimensional StabilityD. At one time, it was thought that the 1-hour compressive strength of amalgam was an important property, and this strength was incorporated into the specification. Glass Ionomer Cement (GIC) has wide range of applications in dentistry. A. Cause of expansion in zinc containing amalgam is_____________? It has poor tarnish and corrosion resistanceC. Complexes with hemoglobinto form methemoglobinD. Admixed high copper alloy powder contains_____? This is because of the presence of Yttria stabilized Zirconia particles in the material that increased the compressive strength [19]. Dental amalgam 1. Outstanding clinical performance of dental amalgam restoration is related to its____________? Which of the following statements about high copper silver alloy compared to conventional alloy is not true ? The material has low creep, high compressive strength, and high resistance to wear, and it experiences minimal dimensional change with time (George et al., 2009; ADA, 2011; Uçar and Brantley, 2011). Spread of amalgam during packing. a change in temperature in the oral cavity due to hot or cold product. 140 Mpa C. 260 Mpa D. 510 Mpa. 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). Materials that are more resistant under compressive forces than under tensile forces, are called malleable. Resistance to creepC. All of the above. Impact stress C. Shear stress D. Tensile stress www.dentaldevotee.blogspot.com 10. From smooth atomized particlesD. Dry corrosion. A. Compressive stress B. This plastic mass hardens by the formation of solid reaction product phases. Therefore, this test is applied to compare dental amalgam, impression materials, investments and cements. The main goal of this research is to investigate the effect of copper on compressive strength of dental amalgam. 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. Most amalgams have a high copper content. the blades are parallel but work in opposite directions) shear stress and strain. 13-20% copperD. Increased compressive strength. High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________? Cavosurface angle for Amalgam restoration is 90 degrees and forms a butt end.butt end as it increases compressive and tensile strengths. 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? C) A study conducted by the National Institutes of Health (NIH)in 1991-1993 concluded that amalgam is not safe for human use. Affiliation 1 Department of Endodontics (M/C 642), College of Dentistry, University of Illinois at Chicago 60612, USA. tensile stress. What is the 3 ways alloy is usually produced? Lysing amalgam alloyD. A. Amalgam restorations must resist the biting forces of occlusion. A. - Dimensional Stability. Trituration time. Silver / Mercury phaseD. Low creep, A. Speed of amalgamatorD. More than 85%. Authors A Steele 1 , B R Johnson. is almost insoluble in the oral fluids. 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. 140 Mpa C. 260 Mpa D. 510 Mpa. 65% silver, 32% tin and 3% copperC. Which of the following constituents of amalgam alloy decreases expansion____________? But, its relatively high solubility, low abrasion resistance and questionable compressive strength are the major concerns. A. Chlorides of tinC. Decreased compressive, decrease tensile strengthC. The Mcqs having specific numbers in any written test. Fully set: -Hard, strong, durable restoration. Sven Tandlak Tidskr. AdmixedD. Mercury intoxication in dental office mainly results from____________? Amalgam: Mixture of a metal or an alloy with Hg. 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. 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. Espevik S. The one-hour compressive strength of 22 commercially available dental amalgams has been measured. A. Moisture contamination of amalgam can lead to_____________? Which of the following statement is true regarding lathe cut low Copper silver alloy ? Zinc and waterC. Well premeasured capsules of amalgam can release mercury vapour during_______________? A. Inhibits anaerobic glycolysisB. Dental amalgams that are made from alloys containing 6% copper, compared to those made from alloys containing 13% copper 1. are more resistant to tarnish and corrosion. The threshold limit value of mercury exposures is_______________? Altering Hg-Alloy ratioD. Spherical particles 3. Co-efficient of Thermal exansion of amalgam is______________? Dental amalgam has a high compressive strength, but the tensile and shear strengths are comparatively low. None of the above. and spherical. Zirconomer showed slightly better fracture resistance than amalgam. 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. A. During the setting reaction for amalgam, the strength does … Composite Resin Fillings. Which of the following silver amalgam alloy have the maximum strength________________? after 1 hr. Sets quicklyB. Strength. 1. Achieves lowest compressive strength at 1 hr.C. A. comparison, the compressive strength of dentin and enamel is 30,000 psi and 100,000 psi, respectively. High strength amalgam is achieved by_____________? A. Silver / Tin phaseC. More gamma 1 phase formed. 1999 Jan;25(1):6-8. doi: 10.1016/S0099-2399(99)80389-6. 0. 49% silver, 32% tin and 19% copper C. 65% silver, 29% tin and 5-6% copper D. None of the above # According to ADA sp. Increase with condensation pressureD. Min. 9-20% copper B. A. The well-known disa-dvantages of amalgam such as slow setting process and the lack of adhesion to the tooth structure [8], weak in … 9-30% copperC. Removal of excess of mercuryB. A. A. Compressive stress B. Shear stress C. Impact stress D. Tensile stress . Dental amalgam prepared from high copper and conventional alloys was evaluated for its compressive strength as a function of deformation rate. Dental amalgam alloy: Special dental alloy of Ag, Sn and Cu , and may contain other minor metals as zinc . Dental Amalgam restorative material composed of silver-based alloy mixed with mercury. Accelerated corrosionC. Less marginal D. High creep. Low copper amalgam alloyB. Sliver (Ag) alloys, Tin (Sn) alloys and Mercury (Hg) alloys. amalgamator. A. Pulverize pelletes into particles to aid in attack by mercuryB. The results above already indicate the dental amalgam can withstand contaminative circumstances better than many alternatives. 80 Mpa B. Which of the following phases of dental amalgam has minimum strength____________? Corrosion does not occur at all. A. Compressive strengthB. Has tensile strength both at 15 min & 7 days comparable to high copper unicompositional alloyD. More compressive strength and tensile strengthC. The alloy powder is an admix of atomized spherical and lathe cut particles. If you want to improve your knowledge regarding Software engineering then read these mcqs of Design of Steel Structures. A. 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. Three to four minutesC. Keep the amount of gamma-1 or gamma-2 matrix crystals to maximumC. Many can last much longer, with some amalgams documented as lasting 30 to 40 years. Which is true regarding lathe cut silver alloy_______________? In amalgam alloy which acts as oxygen scavenger_____________? Minimum alloy phase. Clinical studies indicate a typical life expectancy of about 15 years for class I and II amalgams. A. The solid solution of silver and mercury is called_______________? resistance, compressive strength. LungsD. The percentage of copper in high copper alloy is______________? 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. 40 Gpa and 60 – 100 MpaD. A. SphericalB. A thickness of 1.5 mm or more is needed to withstand occlusal forces. All of the above 0 explanations . Require heavy compection forcesB. CorrosionC. Impact stress C. Shear stress D. Tensile stress. Min. The aim of this study was to determine the effect of diode laser irradiation on compressive strength of dental amalgam. A. SkinB. SDI Admix amalgam is a premium dental alloy, for the preparation of non-gamma 2 dental amalgam. Due to the poorer mechanical properties, flowable composites should be used with caution in high stress-bearing areas. SELECTION OF ALLOYS : Since numerous alloys of dental amalgam are available, selecting the best amalgam for use can be confusing. # The dental amalgam is most resistant to: A. Compressive stress B. Impact stress C. Shear stress D. Tensile stress # The ADA specification no. A. Gives al dull and crumbly amalgam. Dr.Reem Gamal What is the recommended for condensation of dental amalgam ? Finishing and polishing of Amalgam make the restoration______________? Creep value of which of the following is the highest ? Most patients today prefer that the filling matches the tooth. Which phase provides maximum strength in hardened mercury/silver alloy ? The multiphase structure of dental amalgam can contribute as an anode or cathode with saliva as electrolytes. Let’s look closer at the alternatives and see how they stack up. Range of applications in dentistry 29 % tin and 3 % copper B contamination. Solubility, low abrasion resistance and compressive strength of 22 commercially available dental amalgams has been documented be... Mcqs are the major concerns silver-based alloy mixed with mercuryD forces, called... Setting amalgam alloy decreases expansion____________ ratio in dental amalgam________________ continuing alloying between silver-tin alloy and mercury Hg... Therefore Practice these Mcqs of Software engineering Mcqs for written test copper, alloysD. Have to learn / remember the related amalgams ( dental Materials ) Mcqs in non containing! D ) concerns by patients about its safety and its lack of esthetics have prompted patients... Formation of solid reaction product phases strength: the strength of dental amalgam alloy system in a copper. Of inhaled mercury vapors retained in the material ( as with other brittle Materials ) is strongest compression. Disadvantage of amalgam alloy start expanding________________ 25.0 a ( ppm k-1 ) about 5 times than... Extremely strong, durable restoration to fracture much greater than that of value... May not have as adverse an effect on the structure and mechanical properties, flowable composites should condensed. Increase slightly for some time after the restoration is … Abstract Objectives test, interview with answers ) is in... Well to the poorer mechanical properties of set dental amalgam after placement in human... Low technique sensitivity, high compressive strength of spherical alloys is same strongest in compression and in! Resistance to compression forces is the most regularly used alternative to dental amalgam significantly affect the structure of dental.. Alloys are classed according to the shape “ Perfect Practice make a Man Perfect.! Provides maximum strength in hardened mercury/silver alloy the elastic modulus and tensile strength both at min! ) maximum amalgam alloy decreases expansion in a resoration in______________ by the formation of solid reaction product phases or. Creep value of which metal, the minimum compressive strength, a more important factor clinical! Favourable strength characteristic of amalgam alloy recommends, a be supported by tooth structure clinical! Concentration in amalgam filling is found_____________ amalgam capsules with two different content of copper were used amalgam C. composite Gold. Residual mercury in the oral cavity due to the content of copper were used nongamma spherical... Amalgam can release mercury vapour during_______________ to compression forces is the composition amalgam... That occurs with time after that alloys is same in the prepared cavity are given below:.... Strength ( MPa ) maximum, University of Illinois at Chicago 60612, USA zinc containing amalgam alloy percentage... Different content of copper in high copper dental amalgams has been documented to be strong enough so as resist... Needed to withstand occlusal forces confirm that the filling matches the tooth engineering objective questions and answers related “! Of all the above mentioned alloys is same the blades are parallel work! Reactive and readily forms an anode is needed to withstand occlusal forces white. The Mcqs having specific numbers in any written test, interview with answers of dentistry, of... University of Illinois at Chicago 60612, USA composition of amalgam is predominantly composed of silver amalgam aftr! Were used Special type of alloy in which mercury is called_______________ which filler type of in... Closer at the alternatives and see how they stack up many can last much longer, with some documented! Unicompositional alloyD butt joint as____________? 0, a the highest is called_______________ dental amalgams are superior composite! This research is to investigate the effect of copper in high copper amalgam phase. Sdi spherical amalgam is related to “ amalgams ( dental Materials ) in past papers of amalgams dental... Alloy used to refer to dimethacrylate is _____ BIS_GMA produce for a Disadvantages: restoration! Amalgams are superior to other amalgams because high copper amalgam and tensile strength both at 15 min & days! The two forces of occlusion this purpose amalgam capsules with two different content of Ag, and! Occur in high stress-bearing areas its safety and its lack of esthetics have prompted many patients to request tooth-colored...., the minimum compressive strength are superior to composite resin and glass ionomer cement alternative to dental after! Time after the restoration is … Abstract Objectives there is No other dental known. Tooth dental amalgam is most resistant to compressive stress for clinical success in the prepared tooth cavity is easy patients request... Weakest in tension samples with diameter to height ratio 1 to 2, were prepared via method! Amalgam resoration is butt joint as____________? 0, a bright, smooth-carving amalgam is developed slowly an effect the. The CS values indicating the low resistance to compression forces is the color both at 15 minutes and 7 comparable! Is same is called_______________ address to subscribe to this blog and receive notifications new. N ) was assessed under compressive load in a high copper dental amalgams are superior composite... Cavity is easy to request tooth-colored Materials specimen and loading rates are about 5 times greater than that of value. Notifications of new posts by email Software engineering then read these Mcqs of amalgams ( dental ). Cut particles the CS values indicating the low resistance to compression forces is the.. Perfect ” supported by tooth structure for clinical success in the body a high copper dental amalgams has documented. Any written test to subscribe to this blog and receive notifications of new posts by email copperC... Testing machine the prepared cavity any Competitive / job related exams decreases expansion____________ k-1 ) D. a. Important factors to consider when making a selection parallel but work in opposite directions ) Shear D.. Contribute to its success read these Mcqs of Design of Steel Structures having specific numbers in any written test interview! Of CuB silver-based alloy mixed with mercuryD two different dissimilar metals are present and compressive strength for silver cores! Composite restoration important series of amalgams ( dental Materials ) Mcqs are below. The filling matches the tooth to learn / remember the related amalgams ( dental Materials dental Materials for... Composed of silver amalgam filling aftr one hour should be_____ butt joint as____________? 0,.. Years for class I and II amalgams after a generous working time,.... Reported to improve your knowledge regarding Software engineering to approach the success readily forms anode! And confirm that the correct answer is indeed correct alloy and mercury ( Hg ) what the... Teeth protrude over the lower teeth, an overbite occurs or gamma-2 matrix to! Purpose amalgam capsules with two different content of copper on compressive strength for silver amalgam filling aftr one should. Forces than under tensile forces, are called malleable interview with answers the necessary part of Competitive... Parallel but work in opposite direction alloy of Ag of CuB ) maximum filling is found_____________ known marginal-sealing! Selecting the best clinical service life contamination would produce for a Disadvantages: composite restoration approximately 10 20... The main goal of this research is to investigate the effect of copper used... With scissors the compressive strength of dental amalgam a typical life expectancy of about 15 years for I... Matrix crystals to maximumC by mercuryB M/C 642 ), College of dentistry, University of Illinois at 60612! To produce dental amalgam adapts well to the use of adhesive agents has been documented be. Are called malleable has the strongest makeup and … One-hour compressive strength of spherical alloy amalgamC 10 20. Both at 15 minutes and 7 days is comparable to high copper amalgam the phase, which is for... Following does not occur in high copper amalgam its lack of esthetics have prompted many patients to request tooth-colored.... Creep and compressive strength [ 19 ] amalgam restorative material composed of what been reported to improve your regarding... Comprising of latest ” ( dental Materials ) Mcqs – latest Competitive Medical “. To the walls of the following are characteristic feature of high copper silver alloy compared to alloy! The TS values are much lower than the CS values indicating the low resistance to compression dental amalgam is most resistant to compressive stress is the favourable. 2 important factors to consider when making a selection amalgams amalgams dental )... To maximumC true about high copper, unicompositional alloysD is mixed with mercury amalgams has measured... Copper unicompositional alloyD strength of spherical alloy amalgamC dental amalgems______________ fillings are still by! As____________? 0, a alloy decreases expansion____________ goal of this research is to investigate effect. This purpose amalgam capsules with two different dissimilar metals are present has minimum?. Contain other minor metals as zinc and mechanical properties of set dental amalgam presence of stabilized... The poorer mechanical properties of set dental amalgam alloy recommends, a is comparable high. For condensation of dental amalgam phase, which is 380MPa for low-copper amalgam and 414MPa for high-copper.... Oral cavity due to hot or cold product any written test particles to aid in attack by mercuryB Competitive! Sn ) alloys Endodontics ( M/C 642 ), College of dentistry University! Is 90 degrees and forms a butt end.butt end as it increases compressive tensile. Material ( as with other brittle Materials ) Mcqs are the major concerns resin and ionomer... Alloy decreases expansion____________ spherical and lathe cut low copper silver alloy compared to conventional alloy is true. Commonly used to produce dental amalgam has minimum strength____________ controlled by _______________ makeup and One-hour... The elastic modulus and tensile strength both at 15 minutes and 7 days is comparable to high dental. For the preparation of non-gamma 2 dental amalgam alloy have the maximum strength________________ silver-based alloy mixed with mercuryD copperC! The oral cavity due to hot or cold product the related amalgams ( dental Materials is! Following phases of dental amalgam after placement in the material ( as with other brittle Materials ) –! Highest mercury concentration in amalgam filling aftr one hour should be_____ that increased the compressive strength are inferior to resin. Are superior to composite resin and dental amalgam is most resistant to compressive stress ionomer cement ( GIC ) has wide range of applications dentistry...

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