What the Experts Require:
Blood contains plasma, red blood cells (RBC), white blood cells (WBC), and platelets.
Plasma is the liquid component of blood, made mostly of water and acts as a transporter for cells. Plasma also contains fibrinogen, a protein that acts like a net and catches platelets at a wound site to form a clot.
RBC helps pick up oxygen from the lungs and delivers it to other body cells, while removing carbon dioxide.
WBC fights infection, kills germs, and carries off dead blood cells.
Platelets are responsible for hemostasis, construction of new connective tissue, and revascularization.
Typically a blood specimen contains 93% RBC, 6% Platelets, and 1% WBC*. The rationale for PRP benefit lies in reversing the blood ratio by decreasing RBC to 5%, which are less useful in the healing process, and increasing platelets to 94% to stimulate recovery.
* Marx RE, Garg AK, editors. Dental and craniofacial applications of platelet rich plasma.
Quintessence Publishing Co 2005, 99:1–75.