Abstract
Aging tendons or chronic tendinopathy are frequent conditions responsible for handicap in middle-aged and aging populations. Current therapies fail to relieve handicap. Medical treatment can sometimes be efficient, but surgical procedures often fail to restore tendon function. Cell therapy with platelets, based on tendon histological modifications and the capacity of such tissue to respond to growth factors, is an ever-expanding field of clinical research. In the current review, we compare the histological properties of normal tendons, aging tendons and chronic tendinopathy. We explain the natural healing process of such tendons and the rationale for using, or not, autologous growth factors. We review current clinical studies exploring the effect of concentrated autologous growth factor injection in chronic lesions and attempt to explain why, to date, all clinical studies have demonstrated no effect of such therapies.
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