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Thanks for putting up your question on Just Answer and requesting me personally to answer it !
Unfortunately, there is no home-remedy or a putty that you can out yourself to improve the esthetic appearance of your front teeth. From what i understand, your teeth have thinned down and appear transparent and pale.
These would either need:
1. Direct Veneering by direct composites
2. Indirect Veneers that would be prepared in a lab and then cemented
3. Full coverage crowns
Im sure your dentist will work out a sound treatment plan soon and you will hjave great looking front two teeth!
Hope this answers your question. Feel free to contact me again for more information. Please leave a positive rating for me if this answer has helped you. I do not get credit for it otherwise.
Good Luck !