“…When the analysis of the cage filled with autograft (with or without autologous platelet concentrate) was made by CT, it was observed a quicker fusion in those patients with autologous platelet concentrate added, although the result, at the end of the follow-up, was the same [12]. It is true some authors emphasize on its goodness for lumbar arthrodesis [4,6] but our results agree with those from literature and we can claim, as a rule, that we get less fusion rates when adding autologous platelet concentrate to autograft or autograft plus TCP/HA [5,17,24,26,30]. So far, all clinical reports are case studies and we did not find level-1 data to support the use of autologous platelet concentrate in spinal fusion [1].…”