الفهرس 
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Abstract
The sinus lifting procedure is an important technique used to increase the vertical bone height in atrophic maxilla prior to dental implant insertion. Ever since its introduction, this technique has markedly improved, although a consensus on the ideal grafting material has yet to be found.
The aim of study was to assess the value of Platelet rich fibrin versus no grafting technique in maxillary sinus floor augmentation
This study has been conducted on 14 maxillary sinuses. They were divided randomly into two groups, group A, in which all sinuses have been augmented by Platelet rich fibrin (PRF) as a sole grafting material and group B, in which the ‘no grafting’ technique was applied. The lateral antrostomy approach was followed in all cases with simultaneous implant placement.
After six months, secondary stability (using RFA device) and amount of Endosinus bone gain were assessed. Radiographic measurements were done using the voxel registration technique on CBCT scans to facilitate accurate measurement of difference between immediate and 6 months postoperative scans.
The comparison between the two groups regarding the amount of bone gain and the change in ISQ reading showed no statistically significant difference.
Conclusion
Within the limitations of this study, we conclude the following:
-Using Platelet rich fibrin as a sole grafting material in sinus lift did not add much value compared to the “no grafting” technique.
-Both techniques resulted in successful clinically stable implants and considerable amount of bone gain.
- Long-term clinical and radiographic studies comparing both techniques with the gold standard autogenous bone graft and/or xenograft are needed before final conclusions on this topic can be made.