Comparative evaluation of staining and micro-shear bond strength of silver diamine fluoride, silver diamine fluoride with potassium iodide, and ammonium hexafluorosilicate on primary teeth: An in-vitro study

Tanya Sinha1image, Praveen Kumar S Bali2image, Bharath KP3image, Mallikarjuna K4image, Patil Disha5image, Poornima Parameshwarappa6image

Highlights

The study compared color stability
and bond strength of silver diamine
fluoride (SDF), SDF with potassium
iodide, and ammonium
hexafluorosilicate on primary teeth.

SDF and SDF with potassium iodide
caused severe discoloration, while
ammonium hexafluorosilicate showed better color stability and higher bond strength.

Ammonium hexafluorosilicate may be a preferable alternative in primary teeth where esthetics and composite bonding are clinically important.

Abstract

Aim: To compare and evaluate the staining and micro-shear bond strength of composite resin following the application of silver diamine fluoride, silver diamine fluoride with potassium iodide, and ammonium hexafluorosilicate on primary teeth. Methods: Forty-five extracted human primary teeth were divided into three groups (n = 15) according to the surface treatment received: silverdiamine fluoride, silver diamine fluoride with potassium iodide, and ammonium hexafluorosilicate. Color changes were measured at baseline, 5 minutes, 7 days, and 30 days using spectrophotometry. Following surface treatment, composite resin was bonded, and the specimens were subjected to thermocycling. Microshear bond strength was then evaluated using a universal testing machine. The statistical significance was set at p< 0.05. Repeated measures ANOVA and Post
Hoc Tukey HSD test was performed. Results: Teeth treated with ammonium hexafluorosilicate demonstrated the least discoloration and the highest lightness values at 30 days. Silver diamine fluoride with potassium iodide exhibited the greatest color change compared to silver diamine fluoride. Micro-shear bond strength was significantly higher in the ammonium hexafluorosilicate group compared to both silver diamine fluoride and silver diamine fluoride with potassium iodide (p < 0.05). Conclusions: Ammonium hexafluorosilicate exhibited superior color stability and higher micro-shear bond strength compared to silver diamine fluoride and silver diamine fluoride with potassium
iodide, indicating its potential as

Keywords: Dental Bonding; Potassium Iodide; Silver Diamine Fluoride; Tooth Deciduous; Tooth Discoloration

Author Affiliations

  1. Department of Paediatric and Preventive Dentistry, College of Dental Sciences, India (Correspondence:tscrystallinenet07@gmail.com)
  2. Department of Paediatric and Preventive Dentistry, College of Dental Sciences, India
  3. Department of Paediatric and Preventive Dentistry, College of Dental Sciences, India
  4. Department of Paediatric and Preventive Dentistry, College of Dental Sciences, India
  5. Department of Paediatric and Preventive Dentistry, College of Dental Sciences, India
  6. Department of Paediatric and Preventive Dentistry, College of Dental Sciences, India
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Article Info

Contemp Pediatr Dent 2026:7(1):101-109

Received: 28 October 2025

Accepted: 31 March 2026

Online First: 20 April 2026

DOI: 10.51463/cpd.2025.57

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					Tanya Sinha, Praveen Kumar S Bali, Bharath KP, Mallikarjuna K, Patil Disha, Poornima Parameshwarappa. Comparative evaluation of staining and micro-shear bond strength of silver diamine fluoride, silver diamine fluoride with potassium iodide, and ammonium hexafluorosilicate on primary teeth: An in-vitro study. Contemp Pediatr Dent 2026:7(1):101-109

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