SDI continues to innovate SDF solutions by releasing Riva Star Aqua, a next generation water-based silver fluoride solution that is also effective in arresting carious lesions as an SDF solution, with additional patient benefits.

Similar to Riva Star (SDF), Riva Star Aqua (AgF) is also a non-invasive 2 step patented system used to desensitise tooth pain in a few drops. Riva Star Aqua is an aqueous silver fluoride solution without the Ammonia base.

Clinical Match to SDF

Clinical studies have shown that Riva Star Aqua’s 38% Silver Fluoride (SF) is also an effective desensitiser  as Riva Star SDF solution containing 38% Silver Fluoride.1

Reduce Staining

Just like Riva Star, Riva Star Aqua includes a Potassium Iodide (KI) Step 2 solution, for significantly reducing unsightly black stains.

Improved Smell

The ammonia free solution tastes and smells better, leading to happier, more compliant patients.

Effective Biofilm Inhibitor

Studies support that Riva Star is an effective Biofilm inhibitor. Riva Star has a higher inhabitation zone against four bacterial species compared to sodium hypochlorite.2

Immediate Sensitivity Relief

The silver fluoride and potassium iodide in Riva Star Aqua blocks the microscopic tubules that make up dentine. A low-solubility precipitate is formed that gives instant relief.

Image shows the reaction of AgF and KI to AgI in the first 50 microns below the surface.

Image courtesy of Dr. Geoff Knight

Two Years Desensitising Effect

A clinical study supports the immediate effect after one application with Riva Star, desensitisation lasts for 2 years.3

No Tissue Burn Risk

Riva Star Aqua is water based and ammonia free. This reduces soft tissue irritation and eliminates odours while improving storage stability.

 No Gingival Barrier Required

With no ammonia present, Riva Star Aqua can be safely used without a gingival barrier as soft tissue irritation is significantly reduced. Treatment time is quicker and more comfortable on patients.

  1. Turton B, Horn R, Durward C. Caries arrest and lesion appearance using two different silver fluoride therapies on primary teeth with and without potassium iodide : 12 month results. Clin Exp Dent res 2020;1-11
  2. Heo J Tomkins GR, Love RM ; Evaluation of the antimicrobial activity of combined Silver Diammine Fluoride (SDF) and Potassium Iodide (KI) as an Endodontic Medicament, University of Otago, New Zealand, 2010
  3. Clinical evaluation of a diamine silver fluoride/potassium iodide as a dentine desensitizing agent: 2-year follow up. Craig G – 2014.

1. Clean teeth with prophy paste and isolate area with cotton rolls.


2. Protect lips with petroleum jelly / cocoa butter.

3. Using silver brush, pierce foil on silver blue capsule. In circular motion, push foil to the edge of the opening.

4. Carefully apply solution from silver blue capsule to treatment site only.

5. Immediately, using green brush; pierce foil on green capsule. In circular motion, push foil to the edge of the opening.

6. Apply a generous amount of solution from green capsule to treatment site. Keep applying until creamy white solution turns clear.

7. Blot dry, remove all protective / isolation material.

CAUTION: The material could stain teeth if incorrectly used. Patient must be informed of this risk prior to its use.

Riva Star Aqua Bottle kit
  • 1 x 1.5mL Riva Star Aqua Bottle Step 1 (Blue label)
  • 1 x 3mL Riva Star Aqua Bottle Step 2 (Green label)


Riva Star Aqua Capsule kit
  • 10 x Riva Star Aqua Step 1 (Silver blue capsule)
  • 10 x Riva Star Aqua Step 2 (Green single dose)
  • Accessories







Potassium Iodide’s effect on Silver Diammine Fluoride staining properties as measured through objective color analysis using CIELAB (2024)

Silver Diamine Fluoride compound for dental caries and its characterisation using microscopic, computed tomography and nanoindentation – Sunmoon University Korea (2023)

Penetration of SDF and AgF from the infected dentine towards the unaffected tooth structure (Riva Star / Riva Star Aqua, 2023) – Queen Mary University of London (2023)

Parental acceptance of Silver Fluoride as a treatment option for carious lesions among South African children with special health care needs (Riva Star / Riva Star Aqua) – University of Pretoria – South Africa (2023)

Antimicrobial Persistence of Silver Diamine Fluoride and Silver Fluoride against Streptococcus mutans (Riva Star Aqua) – Wonkwang University – Korea, (2023)

Antibacterial effects of silver fluoride and difluoro silane-based varnish on Streptococcus mutans (Riva Star Aqua) – Wonkwang University – Korea (2022)

Case Study – Riva Star Aqua, A Next Generation Water Based Solution To Arrest Caries, Dr. Vaibhav Garg

Case Study – Silver Fluoride + Glass Ionomer Cement Restoration: The Rationale For This Association – Professor Ana Claudia Rodrigues Chibinski

Case Study – Riva Star Aqua, A Next Generation Water Based Solution To Arrest Caries, Dr Vinicius Moreira

2022 Riva Star Aqua – Reality Ratings – 4.6 stars 

Effect of SDF+KI and AgF+KI on Shear Bond Strength. Amanda Targett, Anthony Clayton, Paul Farrar, Leon Prentice. 2022

2022 Riva Star Aqua – Dental Advisor clinical evaluation – 5 stars

B Turton et al. Caries arrest and lesion appearance using two different silver fluoride therapies on primary teeth with and without potassium iodide: 12-month results. Clin Exp Dent Res. 2020;1–11. November 2020

Jarod Johnson. How to Use a Next-Generation Water-Based Solution for Arresting Caries.  August 2021

Restoring Adult teeth in children

Here’s a great webinar on restoring adult teeth in children – When do you use a composite versus Glass Ionomer by Dr. Jarod Johnson.
Dr. Johnson has a private practice in Muscatine, Iowa. Dr. Johnson has received advanced training in behaviour management, sedation, hospital dentistry, trauma, special health care needs, interceptive orthodontics, space maintenance, oral hygiene and dietary counselling.
The objectives of this course is as follows,
1) Determine treatment options for permanent teeth impacted by caries or simple trauma
2) Choose the appropriate restorative material to achieve optimal outcomes in the developing dentition
3) Implement sectional matrices for Class II lesions in the posterior permanent dentition
4) Utilise Silver Diamine Flouride for minimally invasive dentistry and indirect pulp therapy

Silver Fluoride: A New Era of Caries Management