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Question from Janelle

Hi Debra,

My husband and I have recently become more concerned about all the plastic in our environment.

We are particularly concerned about the night guard that his dentist has him wear because he grinds his teeth at night. I’m wondering about the safety of the night guard.

I tried calling the office that they made it in, but they haven’t done any tests for leaching, he just assured me it was safe.

I did some research and it’s made from: Powder Component: Modified Ethyl Methacrylate Polymer Liquid Component: Modified Ethyl Methacrylate Monomer. Unfortunately, I haven’t been able to find information on if these substances are safe when mixed into plastic.

The company that makes the mouth guards is Astron and the material is called clearsplint.

Any help you can give me with this is much appreciated.

Thank you.

Debra’s Answer

It sounds to me like you mix the powder and liquid together to make the ClearSplint material. It isn’t added to plastic, it is the plastic.

The MSDS lists both of these materials as hazardous as well as ClearSplint itself.

What I don’t know is if they become less toxic when combined, or more toxic. Not enough data is available for this.

Regardless, it seems that ALL plastics leach to one degree or another. I wouldn’t let my child use this without having more evidence of safety than someone on the phone saying it’s safe.

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