This isn't new, writes David Neiwert for The Dodo:
Captive orcas routinely show damaged dentition, primarily broken and worn teeth with the pulp exposed. This is in contrast to wild orcas: many show little or no tooth wear, while those who do tend to specialize in prey with abrasive morphology. Broken teeth in wild orcas are rare.
Activist Heather Murphy of Ocean Advocate said that she visits Tilikum regularly at the park, and has observed the whale displaying unnatural behavior:
Even when he comes out, he is very labored and moves slowly. The last time I was there, he splashed for a while then swam in circles until the music ended and the show was over. He never breached during his splashes but just went from side to side of the pool doing fluke splashes ... In general, it doesn't seem like the trainers know what to do with him. I am amazed that he has the will to stay alive. He's in a small pool and hardly ever even moves. I am also worried about how this is effecting Trua [another orca in Tilikum's tank]. Trua seems to be incredibly social and will often come to the glass when there are people there. He "plays" with toys, etc. But with Tilikum he is not able to get any interaction. A lot of times, he is at the gate between pools with another whale on the other side.