الفهرس 
AcknowledgementsOnly 14 pages are availabe for public view
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Abstract
Objective: PRF is an autologous platelet concentrate suspended in a small plasma volume. The aim of the present study was to evaluate the use of Platelet-Rich Fibrin (PRF) as a grafting material for socket preservation both clinically and radiographically.
Materials and Methods: Ten patients; 7 females and 3 males, with a mean age of 32.4 years (with the range of 17-45 years) were included in this study with 2 contralateral symmetrical teeth in the same arch (split mouth design) indicated for extraction, divided into 10 extraction sockets that received PRF as a grafting material for socket preservation, and 10 extraction sockets that were not grafted to serve as a control, where the the bucco-lingual bone width has measured at the crestal bone level, 3mm and 6mm beneath the crestal bone level, the crestal bone height at the distal and mesial alveolar crest of the socket and bone density was measured Using the image software of Digora (soredex) system and also the width of the attached gingiva was measured, and all measurement was done for both sites immediately after extraction, and three months after extraction, then the patients were scheduled for implant placement.
Results: Concerning the width of the bone at the alveolar crest, 3mm, and 6mm beneath the alveolar crest, control sites showed statistically significantly higher mean % decrease in bone width than PRF sites, when compared to baseline values. As for the width of the attached gingiva, the control sites showed higher % decrease in the width of attached gingival than PRF, however, the difference was statistically non-significant. Radiographic assessment of the bone height, at the mesial alveolar crest
of the sockets for the control sites, showed higher % decrease in the bone height (mesial to the socket), however, when compared with the PRF sites the difference was statistically non significant. Concerning the bone height at the distal alveolar crest of the socket, the control sites showed statistical significantly higher mean % decrease in bone height than PRF sites. As regards the radiographic bone density, the PRF sites showed statistical significantly higher mean % increase in bone density than control sites.
Conclusion: Clinical and radiographic statistical significant differences in ridge preservation were found in favor of the PRF grafted sites versus the control sites, which indicate that socket preservation procedures are effective in limiting horizontal and vertical ridge alterations in post-extraction sites. PRF is a viable and biocompatible autologous biologic material that can be used alone to maintain ridge dimensions during socket preservation.