PRF	Platelet-rich fibrin
TNF-α	Tumor necrosis factor alpha
VEGF	Vascular endothelial growth factor
BMP2	Bone morphogenetic protein 2
COX2	Cyclooxygenase 2
GAPDH	Glyceraldehyde 3-phosphate dehydrogenase
PDL	Periodontal ligament
DMEM	Dulbecco’s Modified Eagle Medium
FBS	Fetal bovine serum
PBS	Phosphate-buffered saline
ELISA	Enzyme-linked immunosorbent assay
PCR	Polymerase chain reaction
cDNA	Complementary DNA
IL-1β	Interleukin 1 beta
LPS	Lipopolysaccharide
ANOVA	Analysis of variance