The Science

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The Science

Your enamel is remarkable. And remarkably fragile.

Tooth enamel is the hardest substance in the human body — but unlike bone, it can't regenerate on its own. Every coffee, every glass of wine, every meal creates an acidic environment in your mouth that slowly strips minerals from your enamel. Over time, that means sensitivity, discolouration, and decay.

For decades, fluoride was the only answer. But science has moved on.

Enter nano-hydroxyapatite.

Nano-hydroxyapatite (nano-HA) is not a new invention — it's the mineral your teeth are already made from. Comprising 97% of tooth enamel, hydroxyapatite is the natural building block your body uses to form and maintain your teeth.

The breakthrough was particle size. At 20–100 nanometres, nano-HA particles are small enough to slip directly into the microscopic gaps and cracks in your enamel — the damage caused by acid erosion — and rebuild the crystal structure from within.

What nano-HA actually does:

Rebuilds enamel — Nano-HA deposits calcium and phosphate directly into demineralised areas, physically restoring enamel at a molecular level. Unlike fluoride, which works indirectly by encouraging saliva to remineralise teeth, nano-HA does the job itself.

Reduces sensitivity — By occluding exposed dentinal tubules — the tiny channels that send pain signals when triggered by heat, cold or sugar — nano-HA creates a protective mineral layer that calms sensitivity over time.

Fights bacteria — Nano-HA actively adsorbs harmful bacteria, including cavity-causing Streptococcus mutans, pulling them away from tooth surfaces and disrupting the biofilm that leads to decay.

Whitens naturally — As nano-HA smooths and fills the microscopic surface defects where stains accumulate, teeth naturally reflect more light — giving a brighter, whiter appearance without any bleaching agents.

Why gum?

Chewing does something toothpaste and mouthwash can't — it keeps the active ingredients in contact with your teeth for an extended period while stimulating saliva flow, which naturally neutralises acid and supports remineralisation. Every piece of Miller Craft gum delivers nano-HA across your entire mouth, reaching surfaces a brush can't always get to.

The research backs it up.

Nano-hydroxyapatite has been studied extensively in peer-reviewed research. Published findings in the Journal of Clinical Dentistry and reviews published by the NIH support its remineralising efficacy on early enamel lesions — with results comparable or superior to conventional fluoride treatment.

Miller Craft is built entirely on this science. Every piece of gum is formulated to deliver nano-HA effectively, consistently, and in a form you'll actually enjoy using every day.

Because the best oral care routine is the one you actually stick to.