Fig. 1From: Clinical observation of autologous platelet rich fibrin assisted revascularization of mature permanent teethPRF assisted mature permanent teeth revascularization operation diagram. a Centrifugal treatment; b Preparation of PRF: After collecting blood and centrifuging, let it stand for stratification, and take the middle Layer PRF gel; C Take the supernatant; d Put the PRF membrane into the root canal; e Tooth with PDF film implanted; f Closed crownBack to article page