Oral Health

Evidence-based guides to bleeding gums, gum disease and bad breath — written from the clinical research, reviewed against what LACALUT® has learnt treating gums since 1925.

Intrinsic vs Extrinsic Stains: Which One Do You Have?

Intrinsic vs Extrinsic Stains: Which One Do You Have?

on Jul 22 2026
Extrinsic stains sit on the surface of your enamel and a whitening toothpaste and a professional clean will lift them. Intrinsic colour is built into the tooth — from ageing, tetracycline, fluorosis or a dead nerve — and no toothpaste will touch it. Here is how to tell which one you have before you spend a cent.