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2022
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Is tooth decay always caused by eating sugar?
Author:
I’m sure many people had this experience as children: whenever it was time to eat candy, adults would always say, “Eat less sugar—otherwise you’ll get cavities.” And the common assumption is that any cavity must be caused by eating sweets. Yet even adults, who don’t crave candy as much as kids do, can still develop cavities.
So, tooth decay isn’t necessarily caused by eating sugar; its development stems from a variety of factors. Now let’s examine what actually leads to tooth decay.
1: Poor oral hygiene and cleaning
Brush your teeth for at least three minutes each time, making sure to clean every tooth surface. It’s recommended to brush three times a day—after meals. If oral hygiene isn’t maintained promptly, food debris can linger and bacteria can multiply. As these bacteria proliferate, they gradually erode the teeth, leading to dental caries.
2: Caries‑promoting foods—sugars (especially sucrose and refined carbohydrates)
These food residues adhere tightly to the tooth surface, resting on an acquired pellicle formed by salivary proteins. This pellicle, shaped by the tooth’s anatomical structure as well as its biochemical and biophysical characteristics, not only ensures robust attachment to the enamel but also allows sufficient time—at an optimal temperature—for acid production deep within the dental biofilm, thereby eroding the tooth, inducing demineralization, and ultimately degrading the organic matrix to form carious lesions.
For dental caries to develop, four conditions must be present: bacteria, the oral environment, the host, and time. The more these conditions are met and the longer they persist, the greater the likelihood of caries formation.
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