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Introduction: Ozone has been recently used as a safe alternative treatment in musculoskeletal disorders with fewer adverse effects than corticosteroids. The aim of this study was to compare the efficacy of a single injection of ozone with that of a corticosteroid in the treatment of shoulder impingement., Design: Thirty patients with shoulder pain and clinical signs and symptoms of impingement were randomly assigned into two groups: ultrasound-guided injection with ozone or corticosteroid. Patients' symptoms were evaluated by visual analog scale, constant score, shoulder pain and disability scale, shoulder range of motion, and ultrasonographic measures before treatment, 2 wks, and 2 mos after injections., Results: Patients' visual analog scale, shoulder pain and disability scale and constant score improved significantly in both groups (P < 0.001), but the benefits were in favor of corticosteroid group (P < 0.001). At intervals between the two follow-ups, an improvement was observed in the visual analog scale score among patients receiving ozone, whereas during the same interval, patients' pain slightly worsened in the corticosteroid group. The range of motion and ultrasonographic measures did not show statistical differences between the two groups., Conclusions: Corticosteroid injection improves the pain and disability scores more significantly than a one-time ozone injection. Ozone may serve as an alternative modality in treating shoulder impingement when the use of steroids is contraindicated.

Objective: Plantar fasciitis (PF) is one of the most common causes of heel pain. The affected area is often close to the attachment of plantar fascia to calcaneus bone. The purpose of this study was to compare the effects of ozone (O2-O3) injection to corticosteroid injection under ultrasound guidance for the treatment of chronic PF., Design: Randomized clinical trial., Setting: Academic University and Neuromusculoskeletal Research Center., Subjects: Thirty patients with chronic PF., Methods: The patients were randomly divided into two groups receiving methylprednisolone (15 subjects) vs ozone (O2-O3; 15 subjects). The following outcome measures were assessed before injection and then two weeks and 12 weeks after the injection in each group; morning and daily pain via visual analog scale, daily life and exercise activities via the Foot and Ankle Ability Measure, and plantar fascia thickness at insertion and 1 cm distal to its insertion into the calcaneus via ultrasound imaging., Results: Intragroup changes showed significant improvement in pain, functional parameters, and sonographic findings in both groups (P < 0.05). Pain reduction (both daily and morning) and daily activity improvement were better in the corticosteroid group two weeks after injection; however, at 12 weeks, the ozone (O2-O3) group had significantly more improvement (P = 0.003, P = 0.001, and P = 0.017, respectively)., Conclusions: Both methods were effective in the treatment of chronic PF. Steroid injection provided a more rapid and short-term therapeutic effect. However, ozone (O2-O3) injection led to a slow and longer-lasting treatment outcome. Ozone (O2-O3) injection can be an effective treatment, with slow onset and a longer durability in the treatment of chronic PF., (© 2018 American Academy of Pain Medicine. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)

Osteoarthritis (OA) is a chronic multifactorial disease characterized by progressive joint degeneration. The purpose of this study was to compare the effects of ultrasound-guided corticosteroid injection with oxygen-ozone injection in patients with knee OA. This double-blind randomized clinical trial was performed on 62 patients with knee OA. The patients were randomly divided into two groups. In the first group 40 mg triamcinolone (1 cc) and in the second group 10 cc (15 μg/ml) oxygen-ozone (O 2 -O 3 ) were injected into the knee joint under ultrasound guidance. Outcome measures included the Western Ontario and McMaster Universities Osteoarthritis (WOMAC), knee flexion range of motion (ROM), effusion in ultrasound images of the suprapatellar recess, and visual analog scale (VAS), which were evaluated before injection, 1 week, 1 month, and 3 months after the treatment. Sixty-two patients (10 men and 52 women) were enrolled with mean age of 57.9 years. VAS improved in both groups (steroid P value = 0.001, oxygen-ozone P value > 0.001). The improvements seen in VAS and WOMAC scores 3 months after treatment were in favor of the oxygen-ozone group when compared to the steroid group (P = 0.041 vs P = 0.19). There was no significant difference between the two groups in ROM and joint effusion seen under ultrasound (ROM p = 0.880, effusion p = 0.362). However, in the oxygen-ozone-receiving group, joint effusion was decreased significantly (p < 0.001). Both steroid and oxygen-ozone injections are effective in patients with knee osteoarthritis. Our study showed that the effects of oxygen-ozone injection last longer than those of steroid injection to the knee joint.