Spain Polyphenols Applications is postponed to 2021

Dear Colleagues,

 

In response to the critical situation and evolution of the COVID-19, the Organizing Committee of Polyphenols Applications 2020 decided to postpone the congress to next year.

 

We will announce the details as soon as the planning of the 2021 meeting has been completed.

 

We will keep your registration, you don’t need to do anything.  In case of cancellation, the Organizing Committee will fully refund you.
Thank you for your understanding of this exceptional situation.

 

We will keep our optimism and wish rapidly to overcome these moments.

 

All our warm regards,

 

Prof. Dr. Andreas Schieber                      
President of Polyphenols Applications 2020
University of Bonn, Germany 

 

An end to cavities for people with sensitive teeth?

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 journal ACS Applied Materials & Interfaces the 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. 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.

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 fight Streptococcus 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.

 

Story Source:

Materials provided by American Chemical Society. Note: Content may be edited for style and length.


Journal Reference:

  1. Jian Yu, Hongye Yang, Kang Li, Hongyu Ren, Jinmei Lei, Cui Huang. Development of Epigallocatechin-3-gallate-Encapsulated Nanohydroxyapatite/Mesoporous Silica for Therapeutic Management of Dentin Surface. ACS Applied Materials & Interfaces, 2017; DOI: 10.1021/acsami.7b06597