<qa>  What is the name of the orthobiologic that has played an important role in the past decadePlatelet rich plasma PRP is an orthobiologic that has played an important role over the past decade in different areas like; spinal fusion, ACL reconstruction, osteoarthrosis and tendinopathies. The use of platelet rich plasma PRP in orthopaedics is overrated and true indications for its use and cost benefit are still unclear. Retrospective studies like Pace T et al in 268 patients did not demonstrated differences in hospital stay, Postoperative hemoglobin levels, range of motion with the use PRP in TKR. Morishita M. Et al in a clinical trial of 40 patients, using intralesional PRP didn t show any benefits for blood loss reduction in TKR, but good clinical results were observed in clinical scores like KOOS and VAS compared to the control group. Other studies have demonstrated the efficacy of topical PRP in blood loss reduction in TKR. 