title: Use of platelet-rich fibrin as an autologous biologic rejuvenating media for avulsed teeth - an in vitro study.
abstract: OBJECTIVE
  The prognosis of replanted avulsed tooth depends on the existence of viable cells in the periodontal ligament and also on those cells which are able to proliferate on the damaged areas of the root. The purpose of this study was to evaluate the survival of periodontal ligament cells (PDL) when soaked in an autologous biologic rejuvenating media after an extra-oral dry time of 40 min.
  
  
  METHODS
  Thirty teeth were selected with intact crown which were advised for Orthodontic extraction having healthy PDL. They were divided into two experimental and two control groups. The positive and negative controls corresponded to 0-min and 1-h dry time, respectively. The experimental teeth were stored dry for 40 min and then immersed in one of the two media, combination of platelet-rich fibrin and platelet poor plasma (PRF+PPP) and PPP for 45 min. The teeth in each group were treated with dispase II and collagenase for 30 min and later centrifuged for 5 min at 50.17 g. The supernatant was removed with sterile micropipette, the cells labelled with 0.4% trypan blue, and the number of viable PDL cells was counted with a haemocytometer, under a light microscope.
  
  
  RESULTS
  anova and Mann-Whitney U-test demonstrated statistically significant differences in the viability of PDL cells among experimental groups.
  
  
  CONCLUSIONS
  Within the parameters of this study, a combination of platelet-rich fibrin and PPP demonstrated higher number of viable PDL cells and hence could be a good biologic rejuvenating media for avulsed teeth.
authors.affiliation: Department of Conservative Dentistry and Endodontics, SAIMS, Indore, India.
authors.forename: Hemalatha
authors.initials: H
authors.lastname: Hiremath
authors.forename: Sadanand
authors.initials: S
authors.lastname: Kulkarni
authors.forename: Robin
authors.initials: R
authors.lastname: Sharma
authors.forename: Vishwanath
authors.initials: V
authors.lastname: Hiremath
authors.forename: Tejas
authors.initials: T
authors.lastname: Motiwala
mesh_terms: D001685:Biological Factors / Q000627:therapeutic use; D001792:Blood Platelets / Q000502:physiology*; D002452:Cell Count; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D003890:Desiccation; D005337:Fibrin / Q000627:therapeutic use*; D006801:Humans; D019188:Organ Preservation Solutions / Q000627:therapeutic use*; D010513:Periodontal Ligament / Q000166:cytology / Q000187:drug effects*; D010949:Plasma; D011897:Random Allocation; D012060:Rejuvenation; D013997:Time Factors; D014084:Tooth Avulsion / Q000473:pathology*
chemical_list: D001685:Biological Factors; D019188:Organ Preservation Solutions; D005337:Fibrin
keywords: Platelet-rich fibrin; growth factors; periodontal ligament cells; platelet poor plasma; platelet-derived growth factors; rejuvenating media