Is there any type of revision surgery following a hemiarthroplasty of the shoulder to improve range of motion and strength?

Yes. In some cases it may be appropriate to convert the hemiarthroplasty ot a traditional total shoulder arthroplasty or a reverse total shoulder.
Ur Ortho can tell. U more about this. The success of ur surgery will depend on the extent of ur injury and the skill of ur ortho. God bless u!