title: Effect of plasma-rich in platelet-derived growth factors on peri-implant bone healing: An experimental study in canines.
abstract: BACKGROUND
  Tissue engineering principles can be exploited to enhance alveolar and peri-implant bone reconstruction by applying such biological factors as platelet-derived growth factors. The objective of the present study is to investigate the effect of autologous plasma-rich in growth factors (on the healing of peri-implant bone in canine mandible).
  
  
  METHODS
  In this prospective experimental animal study, two healthy canines of the Iranian mix breed were selected. Three months after removing their premolar teeth on both sides of the mandible, 12 implants of the Osteo Implant Corporationsystem, 5 mm in diameter and 10 mm in length, were selected to be implanted. Plasma rich in growth factors (PRGF) were applied on six implants while the other six were used as plain implants without the plasma. The implants were installed in osteotomy sites on both sides of the mandible to be removed after 4 weeks with the surrounding bones using a trephine bur. Mesio-distal sections and implant blocks, 50 μ in diameter containing the peri-implant bone, were prepared By basic fuchin toluidine-bluefor histological and histomorphometric evaluation by optical microscope. The data were analyzed using Mann-Whitney Test (P<0.05).
  
  
  RESULTS
  The bone trabeculae and the type of bone generation in PRGF and control groups had no statistically significant differences (P=0.261, P=0.2) although the parameters showed higher measured values in the PRGF group. However, compared to the control, application of PRGF had significantly increased bone-to-implant contact (P=0.028)
  
  
  CONCLUSIONS
  Based on the results, it may be concluded that application of PRGF on the surface of implant may enhance bone-to-implant contact.
authors.affiliation: Department of Periodontics and Torabinejad Dental Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Birang
authors.forename: Alireza
authors.initials: A
authors.lastname: Torabi
authors.forename: Mohammad
authors.initials: M
authors.lastname: Shahabooei
authors.forename: Mansour
authors.initials: M
authors.lastname: Rismanchian