Remineralisation comparison: Fluoride v/s Silica

Remineralisation comparison: Fluoride v/s Silica

Fluoride has long dominated remineralisation discussions, but silica—especially from sources like rice husk ash (RHA) in Nanjangud Tooth Powder—offers a compelling alternative mechanism that works without systemic absorption risks. This comparison breaks down how each rebuilds enamel, highlighting speed, safety, and suitability for daily family use.

Sl. No.

Parameter

Fluoride

Silica (from RHA)

1)

 Mechanism 

Fluoride ion replaces Hydroxide group in hydroxyapatite (HA)

Silicon dioxide from RHA forms silanol groups



forms fluorapatite

attracts calcium and phosphate from saliva; forms scaffold 



-

nucleates new hydroxyapatite (HA) crystals on silica scaffold; layer-by-layer HA growth



ionic substitution pathway 

biomimetic pathway

2)

Result

more acid resistant 

more acid resistant 



structurally non-identical to native HA

structurally identical to native HA



alters original enamel lattice 

preserves original enamel lattice

3)

Systemic risk

high

low



fluorosis, systemic glands' and bone calcification, diminishing IQ

-

4)

Tissue compatability

moderate

high

5)

Bioaccumilation 

yes

no

6)

Long-term use 

risky

safe

7)

Inert

no

yes

8) 

speed of remineralisation

fast

slow

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