As far as I know, he's done for the year... and it's good (not that I'm glad he's injured) but that he can't pull an Eastern Conference Finals Eric Lindros on the team and become a distraction wondering "when will he back? when when when?"
he was fully healed. The plate breaking was a freak accident.
I don't know. I agree with Larry. Breaking an allegedly healed bone while throwing ball with one's son, while a freak accident, is a pretty clear sign that perhaps someone (read: doctor) was looking on the bright side of life when diagnosing a clearance to return.