Comparison of the Analgesic Effect of 2 Shoulder Infiltrations

For patients suffering of osteoarthritis, only analgesic treatments such as anti-inflammatory drugs and cortisone infiltrations provide significant but temporary relief of their pain. The objective is to compare the analgesic effect of 2 infiltrations: Cingal (sodium hyaluronate and triamcinolone) versus cortisone (triamcinolone). It is anticipated that the Cingal infiltration will have a greater analgesic effect than a simple cortisone infiltration in patients with moderate to severe osteoarthritis of the shoulder. Method: * Randomized controlled trial * Monocentric * Randomization will be done using sealed envelopes