Glossary

Injectable PRF (i-PRF)

i-PRF is a liquid form of platelet-rich fibrin prepared at low centrifugal force and short duration, which leaves it injectable before it clots. It is associated with the low-speed centrifugation concept.

In practice

Published i-PRF protocols sit in the range of roughly 44 to 177 g. Lower force in this range has been reported to raise platelet, leukocyte, and growth-factor content relative to higher-speed comparators.

See also

Platelet-rich fibrin (PRF)PRF is a platelet concentrate produced without anticoagulant, so the blood clots during centrifugation and forms a fibrin matrix.
Advanced PRF (A-PRF)A-PRF is a solid platelet-rich fibrin produced with reduced force and increased time relative to the original L-PRF protocol, with the aim of raising leukocyte content and distributing cells more evenly through the clot.
Growth factorsGrowth factors are signalling proteins released by platelets, and they are the reason platelet concentrates are of clinical interest.