Sinus floor elevation with platelet-rich fibrin alone: A Clinical retrospective study of 1-7 years.

N Aoki,M Hirose,M Kurata,Y Ojima,K Wada,Y Shibuya,M Maeda

doi:10.4317/jced.55113

Abstract

BackgroundSeveral sinus floor elevation procedures for implant placement have been introduced. The present study aimed to evaluate the implants placed with Platelet-rich fibrin (PRF) alone in atrophic posterior maxillae and survival rates and the potential factors associated with implant loss.Material and MethodsThis retrospective study evaluated 71 implants in 34 patients after 1-7 years’ follow-up time. Statistical models were used to determine the implant survival and the potential factors associated with loss.ResultsOverall, 7 implants were lost, and the cumulative survival rate at 7 years by implant-based and patient-bases analyses were 85.5% and 85.7%, respectively. The mean residual bone height (RBH) was 4.26 mm. The implant survival rate was significantly lower at RBH < 4 mm than RBH ≥ 4 mm.ConclusionsThis retrospective study showed that sinus floor elevation with PRF alone could be applied in cases of lower RBH. However, it should be carefully performed in cases of RBH < 4 mm before surgery. Key words:Platelet-rich fibrin, dental implant, sinus augmentation, retrospective study.

Highlights

In the posterior maxillary area, several sinus floor elevation procedures for implant placement have been introduced since the 1980s
With the development of sinus elevation techniques, various graft materials for sinus augmentation have been used as filler to maintain adequate space for new bone formation
Sinus augmentation using freezedried bone allograft mixed with Platelet-rich fibrin (PRF) showed accelerated bone regeneration and reduced healing time [5]

Summary

Introduction

In the posterior maxillary area, several sinus floor elevation procedures for implant placement have been introduced since the 1980s. The longer-term outcomes of the procedure and failure factors have not been sufficiently examined The aim of this retrospective study was to test the null hypothesis that there is no difference in failure factors for implants inserted with PRF as the only grafting material for sinus augmentation. The patients’ medical and dental histories were checked at the initial appointment, and patients were selected based on following criteria: 1) tooth loss in the maxillary posterior region, 2) good general health or controlled medical conditions, 3) implant placement by sinus floor elevation with PRF alone as the grafting material, 4) informed consent provided and 5) follow-up visit performed after implant placement at our hospital. Three different sinus floor elevation procedures which are simultaneously carried out with the crestal and lateral approach, and staged implant placement were classified in this study. Implant loss was found for male patients (OR, 2.4) and implant length< 10 mm (OR, 7.3), none of the factors was found be significantly related to implant loss

Discussion

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Conclusion