How to Differentiate between Amalgam Alloy and Dental Amalgam Essay Sample free essay sample

I. Aims:A. To distinguish between amalgam metal and dental amalgam.B. To larn the use of dental amalgam.C. To explicate the trituration and scene procedures. II. Materials:Amalgam metal. quicksilver. proportioner. howitzer and stamp. squash fabric. rubber dike. category I prepared pits. amalgam bearer. cotton plyer. amalgam promoter. Carver. burnisher. III. General consideration: Amalgam is a metal metal the constituents of which are preponderantly silver ( Ag ) . and Sn ( Sn ) . other constituents are Cu ( Cu ) . and Zn ( Zn ) . Dental amalgam is made by blending equal parts ( by weight ) of powdered metal metal with the liquid quicksilver ( Hg ) . The blending procedure of the metal with the liquid quicksilver is called trituration. Amalgam is one of dentistry’s chief curative agents for reconstructing faulty dentitions. It is a really old but it is still a widely used renewing stuff. The oldest written record of the usage of amalgam in dental medicine is a complication in 1528. We will write a custom essay sample on How to Differentiate between Amalgam Alloy and Dental Amalgam Essay Sample or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Amalgam is fictile at temperature of the organic structure for a few minute and so hardens. During indurating small alteration in volume in occurs. Properly condensed amalgam exhibit compressive strength every bit high as some dramatis personae chainss. The amalgam can defy the caustic oral cavity environment. and are bland to the host. The combination of all these belongingss makes amalgam the most universally used renewing stuff. The revised specifications for dental amalgam took efficaciously on June 1970. The major difference in the presence specifications is the inclusion of a diametral tensile trial and the accommodation in puting alteration in flow demands. due to alterations in trial process. Whereas in the yesteryear. manus trituration and condensation are utilized. the alteration includes mechanical commixture with an amalgamator and condensation. As a consequence the specification bounds for puting alterations during indurating have been increased and now let either a little contraction or little enlargement Fillings. pellets. and ellipsoid atoms with or without reenforcing constituents are permitted by the specification. Pressing the metal in a pharmaceutical pill machine makes the pellets. The advantages of the pellets are convenience and truth in proportioning the metal and quicksilver as the pellets are produce by atomisation procedure in which the molten metal is sprayed into an inert atmosphere ensuing in droplets that solidified as spheroidal shaped atoms of many sizes. the metal must be used with low quicksilver content. Functions of constituents of amalgam. Ag causes puting enlargement and increase strength and corrosion and opposition. Sn causes puting contraction and decreases strength corrosion opposition. Cu map much the same as Ag. If Zn content is greater than 0. 01 % . it is called non-zinc amalgam. Zinc reduces oxidization of the other metals. IV. Procedures1. With the ratio of one ( 1 ) amalgam pellet is the 1 ( 1 ) bead if Hg. Using a howitzer and stamp. powderize the amalgam pellet foremost. And so triturate the powdered amalgam pellet 1 bead of Hg. until it exhibits the glistening surface that does non cleaving to the side of the howitzer. and so coheres into a mass when the howitzer is jarred. 2. Transfer the mass to a gum elastic dam sheet. axial rotation into a cylinder or hang-up against your thenar. 3. Then reassign mass into a squeezing fabric. Contorting out extra Hg quicksilver prior to condensation. 4. Using an amalgam bearer. convey mass into the pit and condense or stopper good increment by increase into the pit. Fill pit with a 1mm surplus. Using an egg shaped burnisher. somewhat burnish the sides of your amalgam to ab initio accommodate the Restorations to the borders of your pit readying. 5. Carve the Restoration every bit shortly as it offers a small opposition to the carving instruments. 6. Polish 24-48 hours after condensation utilizing dull bur or mounted rock purnice and H2O with a coppice and eventually zinc oxide and H2O with a gum elastic cup V. Results and Observations VI. Questions1. Explain the importance of following the alloy/mercury ratio specified by the maker. 2. What are the aims of the trituration process? 3. Why should trituration be continued by working it for a few seconds in the gum elastic dam sheet? 4. What is the intent of the squeezing fabric? 5. Explain why you should avoid over trituration or under trituration of amalgam. 6. Why should condensation be than within 3 1/2 proceedingss? Why is at that place a lessening in the strength in this status? 7. Why should amalgam be condensed into the prepared pit in little increase? 8. Explain why taint with wet of amalgam should be avoided? 9. Explain the importance of smoothing the Restoration 24-48 hours after condensation. 10. Explain the consequence of delayed or secondary enlargement of the Restoration.