Table 4.

Main characteristics of selected studies: methods for platelet concentrate preparation

Authors	Type of platelet concentrate and centrifugation system	Volume of blood drawn, ml	Anti-coagulant solution	Centrifugation parameters, no., speed, time	Activator
Alissa et al., 2010 [15]	PRP Platelet Concentrate System PCCS II (3i Implants Innovations, Palm Beach Gardens, FL, USA)	27	citrate dextrose	1× 3,200 rpm 12 min	autologous trombin
Farina et al., 2013 [21]	PRGF PRGF System IV (BTI Biotechnology Institute, Vitoria-Gasteiz, Spain)	20	trisodium citrate	1× 580 g 8 min	calcium chloride
Suttapreyasri and Leepong 2013 [17]	PRF EBA 20 (Andreas Hettich GmbH and Co., KG, Tuttlingen, Germany)	10	none	1× 3000 rpm 10 min	none
Hauser et al. 2013 [18]	PRF NR	8	none	1× 2,700 rpm 12 min	none
Anitua et al. 2015 [16]	PRGF PRGF System (BTI Biotechnology Institute S.L, Vitoria, Spain)	10	3.8 % sodium citrate	1× 580g 8 min	10 % calcium chloride
Marenzi et al. 2015 [19]	PRF Intra-Spin L-PRF kit (Intra-Lock, Boca-Raton, FL, USA)	9	none	1× 2,700 rpm 12 min	none
Temmerman et al. 2016 [20]	L-PRF Intra-Spin L-PRF kit (Intra-Lock, Boca-Raton, FL, USA)	10	none	1× 2,700 rpm 12 min	none

PRP = Platelet-rich plasma; PRGF = plasma rich in growth factors; PRF = platelet-rich fibrin; L-PRF = leukocyte-enriched PRF; NR = not reported.