90 patients with adhesive capsulitis were randomized to one of three different injection therapies: hydrodilation, intra-articular steroid injection, or subacromial sterioid injection. The purpose of this study was to determine if hydrodilation offered significantly better pain outcome, function outcome, or range of motion when compared to intra-articular and subacromial steroid injection. Follow-up was performed at 1, 3, and 6 months post-injection. Results demonstrated significantly lower pain and significant greater range of motion at 1 month in the hydrodilation group compared to the other two groups. Additionally, functional outcome, either through the Simple Shoulder Test or Constant score, was significantly greater in the hydrodilation group up to 3 months post-injection. Nonetheless, differences between groups in all outcome measures were not significant at 6 months post-injection, however, this may have been due to the conditions natural history to improve at 6-12 months regardless of treatment intervention.