Classification of PRP
Leucocyte rich - PRP	•Most studies use LR-PRP •Heightened acute inflammation response •May have anti- microbial role
Leucocyte poor -PRP	•Requires separator •Endoret/PRGF – type of LP-PRP
PRP gel preparations	•Fibrin matrix/membrane •Application of thrombin/Calcium chloride •Provide scaffold and structural support •Enhanced delivery of growth factors
PRP by products-Platelet poor plasma Platelet poor gel	•Lacks growth factors but has full complement for coagulation cascade •Formed by activation of PPP •Provides scaffold for cell migration and new matrix formation