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    Oral hygiene is one of the most pressing concerns that any astronaut has. Taking care of your teeth in space and brushing properly is a duty that no astronaut can let go of. This is primarily because of the fact that there are no dentistry services in space. So, if your teeth go bad, and you’re on an important space discovery mission that has to last 6-12 months, you will have no choice but to return to earth prematurely. This is one of the biggest failures in an astronaut’s …