One-year implant survival following lateral window sinus augmentation using plasma rich in growth factors (PRGF): a retrospective study

Abstract

Background: The aim of this study was to assess one-year implant survival after lateral window sinus augmentation using PRGF combined with various bone grafting materials. Material and Methods: This was a retrospective chart review and radiographic analysis of patients that had undergone lateral window sinus augmentation with PRGF and had dental implants placed at least 6 months post augmentation. All implants included were followed up for at least one year after placement. Demographic, sinus and implant related characteristics (residual ridge height, sinus membrane perforation, type of graft material, implant length and width and ISQ at placement) were analyzed. Results: A total of 31 patients with 39 sinus augmentations and 48 implants were included. The mean follow up was 22.8 ± 9.9 months. Implant survival was 95.8%, with 2 implants overall failing. Among all the variables assessed, the only one found to be associated with an increased risk for implant failure was the use of xenograft as bone grafting material in the sinus. Conclusions: Within the limitations of this study, dental implants placed in maxillary sinuses grafted with PRGF in combination with bone grafting materials, exhibit high implant survival rates after at least one year follow up.

Lateral and crestal sinus lift complications: a retrospective comparative study

“…Studies have shown that the survival rate of implants placed after maxillary sinus augmentation with bone grafts is 95.8%. 11 The aggregated results in this study of lateral and crestal sinus lift are in agreement with published data (96.61%). Despite the difficulties of the intraoperative diagnosis of possible perforation of the sinus membrane related to the crestal approach, successful osseointegration rates in the studied group were high -99.8%).…”

“…9,10 Although complications such as infection, sinusitis, membrane perforation, and graft displacement may occur during the procedure, the success rate of the sinus lift is generally high, with implant survival rates ranging from 92.6% to 98.6%. 11,12…”

CBCT assessment of the integration of xenograft mixed with plasma rich in growth factors (PRGF) in direct maxillary sinus lift surgery: Case series study

“…(22) Although minor perforations occurred in 5 of 20 sinuses (25%) in the present study, no signs or symptoms of infection involving maxillary sinuses or grafts were observed in the follow-up period. In a recent similar study by Dragonas et al, (17) using PRGF mixed with bovine bone and lateral window sinus augmentation procedure, 36% of the sinuses included had Schneiderian membrane perforation during sinus augmentation; yet this was not associated with implant failure in their study. The membrane, being redundant on its superior reflection, is usually self-sealing.…”

“…The increased bone height was 8.78 mm after 6 months period which was approximately four times the RRH. Dragonas et al (17) reported mean initial ridge height of 3.9 mm and ridge height of 15.64mm after lateral window sinus augmentation. The bone height increase in their study was 11.73mm after 6 months from the graft surgery.…”

“…PRGF is an autologous platelet concentrate that has been used combined with graft materials in maxillary sinus augmentation. (17) PRGF has several advantages: No immunological matters are considered as it is an autologous preparation obtained from patient's own blood. (18) Neutrophils, which express matrix-degrading enzymes that could destroy surrounding injured or healthy cells, are eliminated from the PRGF.…”