Do I have to use a new mouth guard, or can I use one I haven't used in a while if I fit it with the steps in the article?
Md Ariful Islam
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,
এমবিএ(মার্কেটিং)
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Dr. Md Rushad Rahman
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,
পিজিটি(মেডিসিন)
You should get a new one. An old one will not mould well to your teeth as it will likely be dry and cracked.
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