Is It Okay To Exercise (And Use The BackBlock) After Hip Replacement - and Other Surgery?

I came to see Sarah in Bridge Street many years ago. The BackBlock has been fantastic.
A few years ago I had a massive fall resulting in a hip replacement.
My back has been very good but recently it’s become very sore due to lack of movement after breaking my wrist.
I just want to know if it’s safe to use the BackBlock with a hip replacement. Or could it cause the hip replacement to go out of place?
Is Sarah practicing somewhere in Sydney these days as I’d love some physio done . Thank you so much