Regenerative medicine involves non-surgical tissue augmentation via injection of cells and growth factors.
Regenerative medicine may be undertaken by Physician or by Surgeon
Because no surgery is involved, these interventions may be performed by a doctor without specialisation in orthopaedic surgery.
Regenerative medicine: Current therapies and future directions. Mao AS and Mooney DJ. Proc Natl Acad Sci U S A. 2015 Nov 24; 112(47): 14452–14459.