Evaluating newer joint injections against repeat steroid shotsRepeat corticosteroid injections for hip and knee pain ease symptoms for about six weeks, then lose effect, while frequent use can accelerate cartilage loss. Exosomes for knee osteoarthritis remain unapproved and experimental, and BMAC for ankle cartilage defects is usually an adjunct with limited trial evidence.Repeat corticosteroid injections for hip and knee pain ease symptoms for about six weeks, then lose effect, while frequent use can accelerate cartilage loss. Exosomes for knee osteoarthritis remain unapproved and experimental, and BMAC for ankle cartilage defects is usually an adjunct with limited trial evidence.