New Delhi, Dec. 30 -- Scroll through Instagram or Facebook, and you'll see it - the same crisp, white, polished smile, framed by good lighting and confidence. We live in an age where every grin can end up online, and the pressure to look "put-together" has turned oral beauty into part of the daily routine. But here's what most of us forget: beneath every glossy selfie and whitening strip lies a thin, invisible shield that keeps that smile looking good - your enamel.

It's the strongest substance in your body, but unlike skin or bone, it can't heal itself. Once it's worn away, it's gone for good. So while we obsess over the shade of white, the real conversation should be about keeping what's underneath, that armour of enamel, intact.

Many...