Disability feature: The Why’s & Why Not’s, and if so, How?

I'd rather have a functional hospital feature, so our sims can go to the ER to get checked out when they are sick. I also wouldn't mind injuries such as broken bones, or something. That way they can hobble around on crutches until they're all healed.

I'd even settle for toothaches and a NPC dentist who pulls their teeth or does repair work when needed.