Pripatnanont P, et al. – The primary goal of this study was to examine the dimensional change and microstructure of intraoral bone block grafts covered with platelet–rich fibrin (PRF) and a barrier membrane in ridge augmentation. Researchers observed that the dimensional change of the intraoral block graft covered with PRF and a resorbable membrane was minimal, and the symphysis graft was less resorbed than the ramus graft. Although, their microstructures were comparable.