This study was aimed to evaluate the effect of the use of Platelet-
Rich Fibrin on immediat complication following impacted
mandibular third molar surgery. forty extractions of bilateral
impacted mandibular third molars were performed in 20 volunt
eers
(18 to 25 years old). After extraction of right and left mandibular
third molars, the socket at 1 side received the autologous PRF (test
group) and the other was filled with blood clot (control group) .