Sticky Bone Compared to A-PRF(Platlet Rich Fibrin) Effect on Alveolar Ridge Preservation

Patients who are treated and referred for having extractions in the upper and lower arch for single rooted teeth will have CBCT for each patient at time of extraction (T0) and after 3 months (T1) , by using the cross sectional of the CBCT investigators will measure the difference from the middle of the socket to buccal and palatal\lingual walls at 3 different points below the crest 1mm, 3mm , 5mm .

• the thickness of the buccal bone at baseline (T0) at 1, 3 and 5 mm below the crest
• the horizontal ridge width at crest- 1 mm (HW- 1 mm), crest- 3 mm (HW- 3 mm) and crest- 5 mm (HW- 5 mm) at the buccal/palatal side, in millimetres and later transformed to percentages
• the vertical resorption on both buccal and palatal side, in millimetres
• the socket fill defined as the highest point of viewable mineralized bone at the middle of the socket; absolute values (in mm) and percentages were calculated by comparing the initial depth of the socket and the depth after three months of healing preparation of the materials to be augmented : autologous fibrin glue mixed with bone graft(sticky bone) would be prepared by using green tubes by choukroun company centrifuged at 1300 rpm for 14 minutes (using DUE centrifuge) then mixed with 0.5 cc FDBA and the exudate of the compressed A-PRF then applied to the extraction site A-PRF PLUGS will be prepared using red tubes using venous blood centrifuged at 1300 rpm for 14 min , then the compressed using special tray and applied in the extraction sockets