What are the pain management options for hip pain?

Hello doctor,

I had a fall nearly 20 years ago which caused a left fibular fracture, a left piriformis tear as it inserts into the greater trochanter on the left, and significant anterior and posterior labral tears in each hip with symphysis pubis pain and dysfunction. I was told my pelvis was unstable. Initially, I had an arthroscopic surgery on each hip to debride the large labral tears which then resulted in bilateral femoral acetabular impingement, ossification and greater trochanter bursitis with lots of muscle imbalance as well as my SI Joints would go out of position frequently. All are terribly painful.

I then had a second arthroscopic surgery on each hip to treat the FAI, ossification, and bursitis. All the while I was having problems walking normally, muscle imbalances, pain in my hips, and SI Joints and the greater trochanter bursas did grow back with time with recurrent GTB pain bilaterally. I then went on to have a total hip replacement on each hip which also unfortunately led to a leg length discrepancy. I reported I could feel my SI Joint was out of position immediately after each hip replacement and I could not have the PT manipulate my SI Joint back into position until six weeks after each hip replacement. With all that background in mind, my question is how would all of my hip problems and greater trochanter bursitis and SI joint instability and pain be helped by a SI joint fusion?

I have had numerous bursa injections and SI Joint Injections to quell the pain but at this point, my SI Joints are now so degenerated it is difficult for the pain management doctor to get into my SI Joints to administer the steroid injections so I was told my next step would be SI Joint Fusions bilaterally which would help the GTB. I am currently taking Gabapentin, Cyclobenzaprine, Naproxen as needed, Lidocaine patches and topical cream, and Tylenol as needed. I do not understand how this is all related. Kindly suggest.

Thank you.