Source: Revista Brasileira de Reumatologia (English Edition)
http://www.sciencedirect.com/science/article/pii/S225550211500053X
Authors: Eduardo Knop, Luiz Eduardo de Paula and Ricardo Fuller
CONCLUSION
We conclude that, based on randomized controlled studies, PRP seems to produce improvement in pain and joint function in knee osteoarthritis, both compared to placebo and hyaluronic acid. The response can be sustained for a period of up to two years, and seems to be more evident in milder cases of OA. There is no consistent evidence of the action of PRP on the cartilage measured by imaging.