What type of dental crown would you recommend for a person that plays sports?

My 14 old was hit in the mouth and his front tooth was traumatized. He had to get a root canal and the dentist said he will need a crown. He is a basketball player and I'm concerned about which type of crown would be best. Right now I am planning to get him an all porceline crown. I'm struggling with this. I don't want his tooth to look fake or get a silver line at his gum line.