Natural tooth is beautiful than artificial. Try to save the natural one as much as possible. Implant is costly n can done on same day also seeing the condition and for eating gutkha if u think of replacing your natural one with the artificial then you are wrong. Teeth you will replace what about the other oral mucosa if become bad!??. Better stop gutkha n consult a dentist. We are there to save the tooth n make good oral hygeine.