Fired associate, problems ensued

I’m working in a practice that recently let go of an associate. I’ve started seeing some of their patients who had crowns placed about a year ago, and I’m noticing that many of them have wide open margins. On top of that, most of these patients have been referred to endo for root canal treatment. These are not deep caries cases. The preps are very aggressive, based on what my assistants and I have observed.

These conversations with patients are really difficult because the work was done within our practice. Should I monitor these cases or mention the issues to patients?

On the other hand, the former associate hasn’t been responding to management’s attempts to get them back to address these cases or offer compensation for the redos.

If you were in my position or the owner’s position, how would you handle this?