PUBLISHED ARTICLE · Sep 8, 2026
RETRO-FUTURISM OF TEETH CLEANING
By ruthwik chegu
Abstract
5 July 2025 RETRO-FUTURISM OF TEETH CLEANING In the modern routine, most people begin their day by applying a dollop of toothpaste onto a toothbrush and brushing for about two minutes. This cleaning act aims to remove dental plaque — a microbial biofilm that accumulates on teeth due to the activity of oral bacteria. These microorganisms thrive on residual food particles from daily consumption and metabolise sugars to produce lactic acid. The oral cavity provides a favourable environment for this complex matrix of bacteria, salivary proteins, food debris, and extracellular polysaccharides to accumulate, proliferate, and mature. Our current staple and
Clinical keywords
- tooth powder
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1. Fluoride-Based Remineralisation Reaction (substitution of OH⁻ in hydroxyapatite): Ca₁₀(PO₄)₆(OH)₂ + 2F⁻ → Ca₁₀(PO₄)₆F₂ + 2OH⁻ Explanation: - Fluoride ions (F⁻) replace hydroxyl groups (OH⁻) in hydroxyapatite (HA). - Resulting compound is fluorapatite, which is more resistant to acid but not structurally identical to native HA. 2. Silica-Based Remineralisation (Biomimetic Pathway) Step-by-step Process: a. Initial Binding and Scaffold Formation SiO₂ + nH₂O → SiOH (silanol groups form on the silica surface) - Nano-silica surfaces form silanol groups (Si–OH), which attract calcium (Ca²⁺) and phosphate (PO₄³⁻) ions from saliva. b. Nucleation (under physiological pH) Ca²⁺ + PO₄³⁻ → Ca₁₀(PO₄)₆(OH)₂ ↓
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These ions begin to nucleate into new hydroxyapatite crystals directly on the silica scaffold. c. Crystal Growth and Integration New HA → Integration with native enamel lattice
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Reaction takes place under continued ionic supply
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This leads to layer-by-layer growth of hydroxyapatite, remineralising the enamel without altering its structure. The following table and content further strengthens the case for silica as ideal remineralising candidate, over fluoride: In summary, the fluoride helps in remineralisation via substitution reaction by altering the original enamel lattice. While the silica helps in remineralisation via biomimetic reaction by preserving the original enamel lattice. Thus, RHA based dentifrice represents a retro-futuristic approach to oral care—a model for the future of dentifrice formulations. ASPECT FLUORIDE-BASED TOOTH PASTE SILICA-BASED TOOTH POWDER SYSTEMIC RISK High (fluorosis, glands’ calcification, diminishing IQ) Low TISSUE COMPATABILITY Moderate High BIOACCUMULATION Yes No LONG-TERM USE Risk of overdose Safe for continuous use INERT No Yes