I would ask your surgeon about that. He or she knows what they do in there and what experience with their other patients has told them about dislocation. I think some surgeons today use a technique or prosthesis that is less likely to dislocate than the ones even 10 years ago.
I asked my surgeon about dislocation worries and he told me he rarely has anyone dislocate (and he does about 500 per year). I was completely off hip precautions at 6 weeks with a "you can do whatever you like" from there on out. He even wrote a comment on his written handout guidelines that said that many PT's are not used to total release from hip precautions this early.
I'm sure he doesn't want me doing splits (as if I could do half of one anyway, lol), but it does seem like the hips being done today are pretty sturdy. I even had an aide during my rehab stay abduct my leg WAY past the midline in an attempt to "help" me back into bed (did that ever hurt!!!); I was only 3 days post op and it was sore for quite a few days after that incident, but it was still in the socket just fine.
But, discuss this with your doctor.
Dorothy