Platelets contain over 800 proteins and molecules, comprising cytokines, chemokines, membrane proteins, metabolites, messenger molecules, growth factors. Hence platelets do not only play a role in coagulation and hemostasis, platelets are also involved in vasoconstriction, inflammation, immune response, angiogenesis and tissue regeneration. High concentrations of thrombocytes (PRP/ Platelet Rich Plasma) offers good options in arthrosis of many different joints. The combination with laser offers a highly recommend treatment option.