JOEL - No. I know there are some religions out there that believe in some pretty strange things, but the LDS Church does not believe in nor does it worship mouth jewelry; it believes in God the Father and Jesus Christ and the doctrines and teachings found within the scriptures.
OK seriously now, our Church president has counseled us against adorning our bodies with tattoos and piercings. President Gordon B. Hinckley said:

"Did you ever think that your body is holy? You are a child of God. Your body is His creation. Would you disfigure that creation with portrayals of people, animals, and words painted into your skin?
May I mention earrings and rings placed in other parts of the body. These are not manly. They are not attractive. You young men look better without them, and I believe you will feel better without them. As for the young women, you do not need to drape rings up and down your ears. One modest pair of earrings is sufficient." (Gordon B. Hinckley, “A Prophet’s Counsel and Prayer for Youth,” Ensign, Jan. 2001, 2)

No member is kicked out of the Church if they do have these things; it is just wise council from a prophet of God who believes in the words of the Apostle Paul who taught:

“Know ye not that ye are the temple of God, and that the Spirit of God dwelleth in you? If any man defile the temple of God, him shall God destroy; for the temple of God is holy, which temple ye are” (1 Corinthians 3:16–17).

You need to make your own choice on how you follow the prophet's council and scriptures on this. The Church is not going to come out with a big list of what is OK and not OK. As the scripture says:

"For behold, it is not meet that I should command in all things; for he that is compelled in all things, the same is a slothful and not a wise servant; wherefore he receiveth no reward." (D&C 58: 26)