I have dentinogenesis imperfecta and so does one of my sons. All my teeth have been crowned and my son had his done at two years to save his baby teeth. He had a spreader in the roof of his mouth and currently has braces on his upper teeth. After braces come off, the plan is to crown all his teeth. I love how we have dental insurance, but they will only pay 50% for one crown a year. It would take almost three decades at that rate. I would be happy to sign a petition.