chemistry

Silver diammine fluoride

Silver diammine fluoride is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Silver diammine fluoride rather than just read about it. In short: Silver diammine fluoride (SDF), also known as silver diamine fluoride in most of the dental literature (although this is a chemical misnomer), is a topical medication used to treat and prevent dental caries (tooth decay) and relieve dentinal hypersensitivity. It is a colorless (most products) or blue-tinted (Advantage Arrest, SilverSense SDF), odourless liquid composed of silver, ammonium and fluoride ions at a pH o…

Key takeaways

Silver diammine fluoride belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Silver diammine fluoride to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Silver diammine fluoride from memory before moving on to harder problems.

Reference excerpt

Silver diammine fluoride (SDF), also known as silver diamine fluoride in most of the dental literature (although this is a chemical misnomer), is a topical medication used to treat and prevent dental caries (tooth decay) and relieve dentinal hypersensitivity. It is a colorless (most products) or blue-tinted (Advantage Arrest, SilverSense SDF), odourless liquid composed of silver, ammonium and fluoride ions at a pH of 10.4 (most products) or 13 (Riva Star). Ammonia compounds reduce the oxidative potential of SDF, increase its stability and helps to maintain a constant concentration over a period of time, rendering it safe for use in the mouth. Silver and fluoride ions possess antimicrobial properties and are used in the remineralization of enamel and dentin on teeth for preventing and arresting dental caries. SDF is also known as diammine silver fluoride, silver fluoride, and silver ammonium fluoride. It is frequently spelled "silver diamine fluoride" (with one m); however, this is a misnomer, as SDF contains two ammine (NH3) groups, not amine (NH2) groups. Based on the current, best available evidence, SDF can be used by licensed dental professionals. In the UK, this is classified as 'off-label' use of a topical medicament for arresting caries as it is licensed for treatment of dentine hypersensitivity. It is supported by a robust, extensive evidence base with regard to its efficacy and can be used as long as the following criteria are realised: there is a body of evidence supporting its efficacy; and there is no alternative, licensed medicine. The product was cleared for sale by the U.S. Food and Drug Administration as a Class II medical device for the treatment of dentinal hypersensitivity, and has been classified as an 'effective, efficient, equitable and safe caries-preventative agent' by the Institute of Medicine and the Millennium Goals of the World Health Organization in 2009. It is on the World Health Organization's List of Essential Medicines, first added in 2021 for dental caries.

Brand names Argentina: 38% SDF solution, Fluoroplat, TEDEQUIM Laboratories, Córdoba, Argentina. 38% SDF Solution, FAgamin, Bv. de los Poles 6136, Córdoba, Argentina. Japan: 38% SDF solution, Saforide, Toyo Seiyaku Kasei Co. Ltd., Osaka, Japan. Thailand: 38% SDF solution: Topamine, PharmaDesign Thailand/Dentalife Australia, e-SDF (Caliham Group) USA: 38% SDF solution, Advantage Arrest, Elevate Oral Care LLC, West Palm Beach, Florida, USA; SilverSense SDF, Centrix, Inc., Shelton, CT, USA. India: 38% SDF solution, e-SDF (Kids-e-dental LLP, India) Australia: 38% SDF solution, Riva Star, unit doses, SDI, TOPAMINE (Dentalife Australia) (there are 30%, 12%, and 10% SDFs available from Argentina and Brazil. CarieStop and others.)

Indications and Contraindications of SDF

Indications

SDF use is indicated in the clinical scenarios listed below.

Patients With severe caries risk due to xerostomia (dry mouth from reduced salivary flow); Severe early childhood caries, which does not typically resolve with operative treatment. Babies and toddlers with Early Childhood Caries; Pre-cooperative children, to slow down the progress of the disease prior to building cooperation for treatment; Patients with physical or cognitive disabilities or dental phobia for whom more invasive procedures are not appropriate; Where aerosol generating procedures (AGPs) are unable to be performed or approved; With no or limited access to dental centres owing to its ease of use and minimal equipment requirement.

Teeth Carious primary teeth showing radiographic evidence of being close to exfoliation; Non-restorable asymptomatic teeth where extraction is contra-indicated; With symptomatic Molar-Incisal Hypomineralization (MIH) to ease dentin hypersensitivity and slow down disease progress; With active root surface carious lesions; No symptoms of an irreversible inflammation of the dental pulp.

Contraindications The use of SDF is contraindicated in the following scenarios:

Patients With an allergy to Silver or compounds containing silver; With ulcerative gingivitis or stomatitis; due to pain, can be managed with cautious use of a mucosal covering. Unable to tolerate treatment.

Teeth With irreversible pulpitis or direct pulp exposure. Where it is not possible to achieve adequate isolation of tooth and oral tissues.

Mode of action

SDF's mode of action is well documented, but remains contested. Rosenblatt et al. summarized how the constituents in SDF each have a role in the arrest of microbial species that cause dental caries. The higher the concentration of fluoride in a compound, the more effective its mechanisms in inhibiting bacterial biofilm formation. Fluorides can bind to bacterial cell walls, inhibiting enzymatic processes associated with sugar uptake and metabolism of carbohydrate, therefore producing a surface more resistant to acid dissolution. Similarly, the silver in SDF kills cariogenic bacteria by interacting with DNA and cellular proteins. This leads to cessation of cellular metabolism preventing bacterial cell wall synthesis and DNA synthesis, and ATP production. These actions destroy plaque biofilms, and subsequently arrest dental caries. SDF hardens carious dentin, such that it is twice as hard as healthy dentin

Effect on cariogenic bacteria Colony Forming Unit counts (CFU) and studies of multispecies carious biofilms were carried aiming to examine the action of SDF on cariogenic bacteria. CFU counts on Streptococci mutans, Actinomyces naeslundii, Lactobacillus acidophilus, Streptococcus sobrinus, Lactobacillus rhamnosus (all of which are bacteria intimately associated with the carious process) were significant lower in both dentin surfaces and demineralized dentin treated with SDF when compared to water application. SDF also inhibits the adherence of S.mutans to tooth surfaces. Targino et al. (2014) reported that minimum bacterial concentration and minimum inhibitory concentration of SDF for S.mutans were 50.0 ug/mL and 33.3 ug/mL respectively. This shows that SDF as a compound has better bactericidal effects than silver ammonium nitrate and sodium fluoride (commonly found in toothpastes).

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Silver diammine fluoride

Start with the simplest possible case. Write down what Silver diammine fluoride claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Silver diammine fluoride before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Silver diammine fluoride ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Silver diammine fluoride

In research: Silver diammine fluoride appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Silver diammine fluoride in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Silver diammine fluoride is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ammine complexes, Dentistry, Drugs not assigned an ATC code, so understanding it makes those chapters shorter.
In everyday life: Look for Silver diammine fluoride outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Silver diammine fluoride in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Silver diammine fluoride means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Silver diammine fluoride out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Silver diammine fluoride in simple terms?

Why does Silver diammine fluoride matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Silver diammine fluoride?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Silver diammine fluoride.