Bottom of my two front teeth are see through. what does this mean?

See a dentist: Most likely this means you are grinding on the back of the front teeth and have worn away the enamel and dentin on the back of the front teeth, leaving only the enamel on the front of the tooth. Enamel is translucent, meaning you can see through it. You might be able to have bonding placed on the back of the front teeth to replace what's gone. Call a dentist for evaluation.