Introduction Dental amalgam has been in use for more than 175 years and has been used for hundreds of millions of restorations This material is used to restore teeth with decay It is one of the materials used for direct restorations include silver amalgam composite resin and gold f ID: 641005
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Slide1
topic AWhat is dental amalgam? Should you use it in your dental practice?Slide2
IntroductionDental amalgam has been in use for more than 175 years and has been used for hundreds of millions of restorations
.
This
material is used to restore teeth with decay.It is one of the materials used for direct restorations include, silver amalgam, composite resin and gold foil.Slide3
HistoryDental amalgams were first documented in a
Tang
Dynasty medical text
Hsin Hsiu Pen Tsao
written by Su Kung in
659.Slide4
HistoryIn the west countries, it appeared
in Germany in
1528.
[3][4] In
the 1800s, amalgam became the dental restorative material of choice due to its low cost, ease of application, strength, and durability.[5]Slide5
Compositionmercury
+
metal alloy mixturehalf-to-half one-to-two
Main component：
Ag、Sn
Secondary component
：
Cu
、
Zn
The relative ratios between the other metals used in dental amalgam are also highly variable. Slide6
Properties AgAdvantagesEnhances the strengthReduces liquidity
Forming a metallic luster
Disadvantages
Mixing difficulty Engraving is not easy Not easy to fill Slide7
PropertiesSnAdvantagesEasy engravingDisadvantages
Difficults
solidificationLoss strengthIncreases liquiditySlide8
PropertiesCu AdvantagesMore hardReduces liquidity
Disadvantages
Increases the chances of corrosion
Causes surface discolorationSlide9
How safe is amalgam?the degree of harm caused by mercury in the body is related to the
amount
anxiety, irritability, memory loss, headaches and fatigue.
research have concluded that amount released from amalgam in the mouth is very low.
In 2009, the U.S. Food and Drug Administration (FDA) evaluated the research and found no reason to limit the use of amalgam
. Slide10
Should anyone consider alternatives to amalgam fillings?
people
have allergic reactions to the mercury in amalgam
.pregnant womenpeople who have high exposure to
mercurySlide11
Pros and Cons AdvantagesAmalgam fillings are considered one of the best filling methods of all time. Here’s why
:Slide12
AdvantagesCheapResistanceMalleableStrongcan be placed in one visit
self-sealing
can be used in a wet
environmentlong track recordless technique sensitive.Slide13
Pros and Cons DisadvantagesAt the same time, dental amalgams have a lot of disadvantages to consider.Slide14
DisadvantagesColortemperature changesallergic reactionenvironmental
pollution
Controversy
removal of some healthy tooth structuresSlide15
ComparisonSilver Fillings (Amalgams)AdvantagesDurabilityStrengthExpense
Disadvantages
Poor
aestheticsDestruction of more tooth structure DiscolorationCracks and fracturesAllergic reactionsSlide16
Comparison Cast Gold FillingsAdvantagesDurability Strength
Aesthetics
Disadvantages
ExpenseAdditional office visitsGalvanic shockSlide17
ComparisonTooth-colored CompositesAdvantagesAesthetics Bonding to tooth structure
Versatility
Disadvantages
Lack of durabilityincreased chair time Additional visitsChippingExpenseSlide18
Conclusion Affordable
Stable
SafetySlide19
ReferenceBjørklund, G (1989). "The history of dental amalgam (in Norwegian)". Tidsskr Nor Laegeforen 109 (34–36): 3582–3585. PMID 2694433.
Czarnetzki
, A.;
Ehrhardt S. (1990). "Re-dating the Chinese amalgam-filling of teeth in Europe". International Journal of Anthropology 5 (4): 325–332.Bharti R, Wadhwani KK, Tikku AP, Chandra A (2010). "Dental amalgam: An update". J Conserv
Dent 13 (4): 204–208. doi:10.4103/0972-0707.73380. PMC 3010024. PMID 21217947.