All the guesses are in to answer the question, how did this tooth turn green? And , the winner is Rio Waittier. This patient of mine needed to have a crown placed. He is a tattoo artist and his favorite color is green. He ask if we could make him a green crown and so we did. This tooth is perfectly healthy, free of any problems. Rio, when you want to have your teeth whitened, you’ll receive a 50% discount. Congratulations and great guessing!!