A Prospective Evaluation of the Cingal Injection for Hip Osteoarthritis

Inclusion Criteria: 1. Adult men or women ages 40 to 65 years 2. Hip OA (mild to moderate) diagnosed on x-ray and/or MRI (Tonnis grade 1 and 2) 3. Patient is using only nonsteroidal anti-inflammatory drugs (NSAIDs) or acetaminophen/ paracetamol (Tylenol) for pain relief during the month before receiving Cingal 4. Patient is willing to stop pain/anti-inflammatory medication at least two weeks prior to receiving Cingal through the end of the study (6 months) 5. Patient speaks, reads, and understands the language of the clinical site 6. Provision of informed consent Exclusion Criteria: 1. Evidence of hip dysplasia (centre edge angle less than 20 degrees) 2. Presence of advanced hip OA (Tonnis Grade 3) 3. Previous trauma to the affected hip requiring medical or surgical treatment 4. Previous surgery on the affected hip or contralateral hip 5. Severe acetabular deformities (e.g. acetabular protrusion, coxa profunda, circumferential labral ossification) 6. Infections or skin diseases at target hip joint 7. Immunosuppressive medication use 8. Chronic pain syndromes 9. Significant medical co-morbidities (requiring daily assistance for activities of daily living) 10. History of paediatric hip disease (e.g. Legg-Calve-Perthes; slipped capital femoral epiphysis) 11. Previous cartilage repair procedure (microfracture, Osteochondral Autograft Transplantation System (OATS) or Autologous Chondrocyte Implantation (ACI) with or without use of a scaffold (matrix) in the index hip) 12. Known hypersensitivity (allergy) to hyaluronan preparations 13. Known hypersensitivity (allergy) to triamcinolone hexacetonide preparations 14. Known sensitivity to any of the materials in Cingal 15. Patients with impaired cardio-renal function, endocrine, or other diseases or conditions that use of corticosteroid is warned 16. HA intra-articular injections into the index hip within the last 6 months before receiving Cingal 17. Corticosteroid therapy by systemic, intra-articular, or intramuscular route or oral corticosteroids within the last 6 months before receiving Cingal 18. Any injection received in the hip prior to receiving or received concurrently with Cingal 19. Uncontrolled diabetes 20. Subject is a woman who is pregnant or breastfeeding or a woman of child bearing potential who refuses to use effective contraception during the course of the study 21. Patient is incarcerated 22. Any clinically significant or symptomatic vascular or neurologic disorder of the lower extremities 23. Rheumatoid arthritis or gouty arthritis 24. Current diagnosis of osteomyelitis 25. Diagnosed musculoskeletal cancer or any diagnosed cancer, other than musculoskeletal if not on long term remission (e.g. at least 5 years or negative biopsy at last exam), except basal cell carcinoma 26. Patients who are at higher risk for post-surgical bleeding (e.g., bleeding disorder; taking anticoagulants except low dose aspirin or anti-platelet agents \[e.g. ASA, Plavix\]) or post-surgical infection (e.g., taking immunosuppressants; have a severe infection or a history of serious infection) 27. Participation in concurrent trial that involves a medical intervention 28. Patient is currently receiving workman's compensation or disability, has been involved in an motor vehicle accident, or is in litigation for workman's compensation or disability claims 29. Likely problems, in the judgment of the treating physician, with maintaining follow up (e.g. patients with no fixed address, plans to move out of town). This may include patients with severe mental disorders and drug addictions without adequate support.