Table 1.
Classification of PRP
| Dohan Ehrenfest Classification60 | |||
|---|---|---|---|
| PRP type | Leukocyte | Fibrin density | |
| Pure platelet-rich plasma | Low | Low | |
| Leukocyte- and platelet-rich plasma | High | Low | |
| Pure platelet-rich fibrin | Low | High | |
| Leukocyte- and platelet-rich fibrin | High | High | |
| PAW Classification61 | |||
| Platelet | Exogenous activation | WBC | |
| Total WBC | Neutrophil | ||
| P1≤ baseline (1´) | x | A: above baseline (buffy-coat system) | α: above baseline |
| P2 baseline – 0.75 M/μL | (empty) Endogenous activation | B: below baseline (plasma based-system) | β: below baseline |
| P3 0.75 M – 1.25 M/μL | |||
| P4≥1.25 M/μL | |||
Note: Example: P2-x-Bβ.
Abbreviations: M, million; P, platelet; PRP, platelet-rich plasma; WBC, white blood cell; x, exogenous.