Fig. 4From: Clinical application of concentrate growth factors combined with bone substitute in Alveolar ridge preservation of anterior teethSurgical procedure of CGF group. A Labial view before tooth extraction. B Extraction and ebridement. C Extraction sockets after scoraping. D, E Small pieces of CGF mixed with Bio-oss. F Filled with mixture of CGF and Bio-oss. G Socket covered with CGF membrane and then collagen membrane. H Contralateral suture of gingival flapBack to article page