Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Dental amalgam has a tendency to minimize microleakageif the restoration is properly inserted, leakage decreases as the. The main advantage in developing high copper amalgam allay is. At the time when the patient is dismissed from the surgery, typically some 1520 minutes after placing the filling, the amalgam is relatively weak. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Amalgam must be mixed according to the manufacturers instructions. Tooth preparation it is defined as the mechanical alteration of a tooth to receive a restorative material, which will return the tooth to proper anatomical form, function and esthetics. Safety of dental amalgam and altern ative dental restoration materials 5 opinion to be cited as. Silver amalgam tooth fillings are strong and can withstand the forces of chewing. The rate at which an amalgam develops strength is an important clinical.
Amalgamis an alloy of mercury with one or more other metals. Management of class i and class ii amalgam restorations with. Amalgam has been the primary direct restorative material for more than 150 years in the united states. Amalgam fillings are more durable, especially for chewing surfaces. Dental amalgam has served as an excellent and versatile restorative material for many years, despite periods of controversy. Procedure for amalgam restoration presented by paramita brahmachari p. Read all about amalgams and dental composites here. This was made to a putty like mass that was placed into the defective tooth. Many dental plans do not cover resin composite fillings on back teeth molars. Glass ionomer cement restorations are indicated for the greatest dimensional change in denture bases will occur which of the following is the hardest.
There is still no adequate economic alternative for dental amalgam. It has served as a dental restoration for more than 165 years. This increases the longivity of amalgam restoration 24. Mercury, which makes up about 50 percent of the compound, is used to bind the metals together and to provide a strong, hard, durable filling. Jul 01, 2016 combined amalgam composite restorations have been used through many years to benefit from the advantages of both dental amalgam and composite resin. Rigidity moe of high copper amalgam is 55 gpaclose to enamel. Amalgam condensers, often called pluggers, are instruments used to condense or amalgam carriers. Amalgam is, as name implies, an amalgamation or mixture of different metals. History of dental amalgam tara kaur, dds 9529566700. The american society of dental surgeons denounced the use of amalgam due to concerns about mercury poisoning. Members of the society were required to pledge to avoid the mercury amalgam fillings. Dental amalgam has a tendency to minimize microleakageif the restoration is properly inserted, leakage decreases as the restoration ages in the mouththis is due to the formation of corrosion products which forms at the interface between the tooth and the restoration. Sep 24, 2014 restorative material thickness affects the ability of a material to resist fracture.
Complex amalgam restoration complex amalgam restoration refers to one that involves three or more surfaces of the tooth. Lakewood family dental is your best source online for silver amalgam restoration postsurgery instruction guide. Complex amalgam restorationfinal free download as powerpoint presentation. Silver amalgam restoration postsurgery instruction guide dallas. The patient has been anesthetized with one carpule of 2% xylocaine with 1. Dental amalgam has been used by dentists for more than a century and is the most thoroughly researched and tested restorative material among all. Dental amalgam restorations varying the mercury content of an amalgam results in which of the following.
Ppt dental amalgam powerpoint presentation free to. Amalgam restorations have not been found to be associated with adverse health effects. Composites can also be used as cements to cement crowns and veneers, etc. They also typically cost less than other types of fillings and, unlike gold fillings, require only one trip to the dentist. Introduction dental amalgam is an alloy made by mixing mercury with a silver tin alloy. Context amalgam is a combination of mercury with other metals and has been used as a tooth filling material since early in the 19 th century alternative toothcoloured materials are increasingly used because they look better and require less intervention.
Dimensional changes contraction expansion according to ada specification,it should not expad or contract more than 20ucm at 37 degree celcious between 5min and 24hrs after beginning of trituration. Most people recognize dental amalgams as silver fillings. But if you or your dentist prefers composite fillings, your plan will cover its share up to the cost of an amalgam filling, and you are responsible for the difference. When the material hardens, the tooth is functional again, restored with a silvercolored restoration. Only one caned tuna could rise the blood hg level equal to 1 year working with amalgam without. History amalgam has been primary restorative material for more than 150 yrs. Today, the use of alternative materials such as adhesive composite resins, glass ionomer cements a combination of silicate and polyacrylate and ceramics and gold alloys is increasing, either because of their aesthetic properties or in response to perceived health concerns related to the use of dental amalgam. Mar 21, 2014 the restoration of endodontically treated teeth has undergone significant changes in the last 20 years. Effect of compositeamalgam thickness on fracture resistance. Amalgam is a restorative material especially suitable for classes i and ii restorations in teeth that encounter heavy chewing forces.
A free powerpoint ppt presentation displayed as a flash slide show on id. Amalgam has been the primary direct restorative material. Dental amalgam is a mixture of mercury, silver, tin and copper. Jul 14, 2009 history amalgam has been primary restorative material for more than 150 yrs. Start studying chairside amalgam restoration instruments. Describe the aims of amalgam bonding describe the stages in amalgam bonding adequately place a bonded amalgam in a plastic simulated tooth before completing this section you should view the dental amalgam revision section. Aug 21, 20 the video can be easily paused during presentation to engage in reflection on and discussion of previously presented information. While the amalgam is phasing out in dentistry, composites have become one of the most widely used esthetic restorative materials. Complex amalgam restorationfinal human tooth tooth.
Generally, an ebook can be downloaded in five minutes or less. It constitutes approximately 75% of all restorative materials used by dentists. Class iii and v amalgam restorations pocket dentistry. Focused on essential elements in the cavity preparation for an amalgam restoration, also the possible causes for failure of an amalgam restoration. An amalgam restoration develops its strength slowly and may take up to 24 hours or longer to reach a reasonably high value. Patient concerns regarding longevity of the restoration and about cost may be considerations in decision making about restoration material options. Tarnish and corrosion amalgam restoration often undergo. In this lecture i explain in stepbystep fashion the basics of amalgam class i restoration. Dental amalgam alloyis an alloy that contains solid metals of silver,tin, copper and some times zinc.
Statement on dental amalgam american dental association. Therefore, amalgam should be supported by tooth structures for clinical success in the long term. However, the tensile and shear strengths are comparatively low. In this book, dental amalgam is referred to as amalgam. For the present, amalgam should remain the material of choice for economic direct restoration of posterior teeth. This makes them less likely to break than other types of fillings, such as composite or ceramic fillings. Combined amalgamcomposite restorations have been used through many years to benefit from the advantages of both dental amalgam and composite resin. Dental amalgam definition of dental amalgam by medical. Amalgam restoration definition of amalgam restoration by. Just like dental amalgam, they are used to restore tooth structure lost through trauma, caries, or other diseases. Dental amalgam is one of the most versatile restorative materials used in dentistry. The video can be easily paused during presentation to engage in reflection on and discussion of previously presented information.
Mercury, which makes up about 50 percent of the compound, is used to bind the metals together and to. Amalgam restoration objectives of tooth preparation. Please visit the adas mouthhealthy website for information about amalgam and silvercolored fillings dental amalgam is considered a safe, affordable and durable material that has been used to restore the teeth of more than 100 million americans. Class v tooth preparation for amalgam restorations 1. Pin amalgam restoration free download as powerpoint presentation. Amalgam amalgam an alloy containing mercury dental amalgam an alloy of mercury silver copper and tin, which may also contain palladium, zinc and other elements to improve handling characteristics and clinical performance dental amalgam alloy an alloy of silver copper and tin that is formulated and processed in the form of powder. In addition, the preparation for an amalgam restoration typically requires 90degree cavosurface margins and specific axial depths that allow incorporation of secondary retentive features. Dental amalgam alloy is a silver tin alloy to which varying amount of copper and small amount of zinc has been added. The following data were collected from each article. Two variations have been mentioned for this technique, this study investigated the fracture resistance. Restoration of endodontically treated teeth british dental. All teeth are isolated with a dental dam and cleaned with pumice apply liquid or gel bleach on teeth and light cure sometimes. Scenihr scientific committee on emerging and newlyidentified health risks, scientific opinion on the safety of dental amalgam and alternative dental restoration materials for patients and users, 6 may 2008. When esthetic concerns are paramount, toothcolored materials, placed meticulously.
Class v tooth preparation for amalgam restorations maryam arbab 2. The primary disadvantage of class iii and v amalgam restorations is that they are metallic and unesthetic. Most of these changes are associated with the preservation of tooth structure, this has been. Amalgam vs composite amalgam vs composite is an ongoing controversy and depending on your desires, which one is best for you will depend. To aid in assessment of comprehension of basic concepts covered in the class i amalgam restoration video, an eight question multiplechoice quiz is also included in this submission. Amalgam vs composite restoration, survival, and secondary caries. Amalgam fillings, like other filling materials, are considered biocompatible they are well tolerated by patients with only rare occurrences of allergic response. The advantages of amalgam restorations include resistance to wear, tolerance to a wide range of clinical placement conditions, and excellent loadbearing properties. Scientific committee on emerging and newly identified health. The canadian dental association has been urging the government of canada to support further research to achieve definitive scientific answers, which can better assure canadians of the safety of amalgam as well as all other alternative restorative materials. In recent years refer to an amalgam restoration that replaces one or more cusps.
Jan 21, 20 amalgam vs composite amalgam vs composite is an ongoing controversy and depending on your desires, which one is best for you will depend. It is the most durable and most affordable of all restorative material options. Most of these changes are associated with the preservation of. Ppt microleakage of restorations powerpoint presentation. Initially, amalgam restorations were made by dentists filing silver coins and mixing the filings with mercury. The restoration of endodontically treated teeth has undergone significant changes in the last 20 years. According to skinners, amalgam is a special type of alloy in which one of its constituent is mercury. Dental amalgam is described in detail in online chapter 18. Introduction to amalgam restorations pocket dentistry. Restorative dentistry class ii total practice solution. All freshly seated amalgam restorations are leaky that is why the use of 2 layers of copalite cavity varnish on the walls margins of the prepared cavity in order to reduce the leakage around the restoration. Amalgam bonding requires more clinical time and is therefore more costly and. Bonded amalgam restorations queens university belfast.
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