I was riding my horse in a rodeo, and he threw his head back which made contact with my mouth and displaced one of my upper front teeth. The tooth was forced backwards by about 1/3 of an inch. After about four hours, I managed to work up the courage to pull the tooth forward into it's correct position. The tooth was very firmly set in it's displaced position from the very beginning, so it was not an easy task. About two weeks went by, and I began to see a grey color forming in the upper part of the tooth. It now has been about three weeks since the incident and I can tell the tooth is getting darker. Can anybody please tell me what they think is going on, and whether or not there is anything I can do to prevent the tooth from getting any darker?