Comparison of ultrasound-guided subacromial corticosteroid and ozone (O 2 -O 3 ) injections in the treatment of chronic rotator cuff tendinopathy: a randomized clinical trial.

Three-time ozone injection was not superior to a one-time corticosteroid injection in patients with chronic supraspinatus tendinopathy. It might be as effective as corticosteroid injection at 4-weeks and 12-weeks post-injection in terms of relieving pain and improving quality of life and function.