An End To Cavities For People With Sensitive Teeth?
October 21, 2018
Author: Admin Editor
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An ice cold drink is refreshing in the summer, but for people with sensitive teeth, it can cause a painful jolt in the mouth. This condition can be treated, but many current approaches don't last long. Now researchers report in the journalACS Applied Materials & Interfacesthe development of a new material with an extract from green tea that could fix this problem - and help prevent cavities in these susceptible patients.
Tooth sensitivity commonly occurs when the protective layers of teeth are worn away, revealing a bony tissue called dentin. This tissue contains microscopic hollow tubes that, when exposed, allow hot and cold liquids and food to contact the underlying nerve endings in the teeth, causing pain.
Dentin
Unprotected dentin is also vulnerable to cavity formation. Plugging these tubes with a mineral called nanohydroxyapatite is a long-standing approach to treating sensitivity. But the material doesn't stand up well to regular brushing, grinding, erosion or acid produced by cavity-causing bacteria. Cui Huang and colleagues wanted to tackle sensitivity and beat the bacteria at the same time.
Green Tea
The researchers encapsulated nanohydroxyapatite and a green tea polyphenol - epigallocatechin-3-gallate or EGCG in silica nanoparticles, which can stand up to acid and wear and tear. EGCG has been shown in previous studies to fightStreptococcus mutans, which forms biofilms that cause cavities.
Testing on extracted wisdom teeth showed that the material plugged the dentin tubules, released EGCG for at least 96 hours, stood up to tooth erosion and brushing and prevented biofilm formation. It also showed low toxicity. Based on these findings, the researchers say the material could indeed be a good candidate for combating tooth sensitivity and cavities.
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