Welcome @fancynancysue, Unfortunately @artscaping is no longer following Connect. I had my right knee replaced several years ago and was told that there are always risks associated with the different procedures and shots. I think it's better to discuss the pros and cons with your doctor or care team. Here's some information on the topic that may help with some answers:

"Prolotherapy is an injection treatment. Proponents claim it relieves pain by jumpstarting your body’s natural healing abilities. It's not FDA approved, and most studies have found no scientifically-provable benefits."
-- Prolotherapy: https://my.clevelandclinic.org/health/treatments/22426-prolotherapy