What is the natural history of posttraumatic osteochondritis dissecans of the talus?

@article{Smet2000WhatIT,
  title={What is the natural history of posttraumatic osteochondritis dissecans of the talus?},
  author={Arthur A. De Smet},
  journal={AJR. American journal of roentgenology},
  year={2000},
  volume={174 3},
  pages={867}
}