topic A What is dental amalgam? Should you use it in your dental practice?

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topic AWhat is dental amalgam? Should you use it in your dental practice?

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.

HistoryDental amalgams were first documented in a

Tang

Dynasty medical text

Hsin Hsiu Pen Tsao

written by Su Kung in

659.

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]

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.

Properties AgAdvantagesEnhances the strengthReduces liquidity

Forming a metallic luster

Disadvantages

Mixing difficulty Engraving is not easy Not easy to fill

PropertiesSnAdvantagesEasy engravingDisadvantages

Difficults

solidificationLoss strengthIncreases liquidity

PropertiesCu AdvantagesMore hardReduces liquidity

Disadvantages

Increases the chances of corrosion

Causes surface discoloration

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

.

Should anyone consider alternatives to amalgam fillings?

people

have allergic reactions to the mercury in amalgam

.pregnant womenpeople who have high exposure to

mercury

Pros and Cons AdvantagesAmalgam fillings are considered one of the best filling methods of all time. Here’s why

:

AdvantagesCheapResistanceMalleableStrongcan be placed in one visit

self-sealing

can be used in a wet

environmentlong track recordless technique sensitive.

Pros and Cons DisadvantagesAt the same time, dental amalgams have a lot of disadvantages to consider.

DisadvantagesColortemperature changesallergic reactionenvironmental

pollution

Controversy

removal of some healthy tooth structures

ComparisonSilver Fillings (Amalgams)AdvantagesDurabilityStrengthExpense

Disadvantages

Poor

aestheticsDestruction of more tooth structure DiscolorationCracks and fracturesAllergic reactions

Comparison Cast Gold FillingsAdvantagesDurability Strength

Aesthetics

Disadvantages

ExpenseAdditional office visitsGalvanic shock

ComparisonTooth-colored CompositesAdvantagesAesthetics Bonding to tooth structure

Versatility

Disadvantages

Lack of durabilityincreased chair time Additional visitsChippingExpense

Conclusion Affordable

Stable

Safety

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.