I have fractures of the bilateral superior pubic rami rt comminuted & mildly displaced. fracture rt inferior pubic ramus. also a buckle fracture of the anterior aspect lf sacrum. stable or not stable?

Stable: What you have described sounds like a stable fracture, but you really need to see a physician for evaluation and close follow-up to confirm whether the fractures are stable or not. Having multiple fractures as you have described is certainly going to be painful, but pain does not necessarily mean instability.

Hard to say: Certainly these are serious injuries, but they likely do not need surgical fixation - depends on the displacement. Unfortunately, a patient with these fractures will need to be immobilized for a few weeks in order to facilitate proper healing.