Authors
Merheb J., Nurdin N., Bischof M., Gimeno Rico M., Quirynen M., Nedir R.
Title
Stability evaluation of implants placed in the atrophic maxilla using osteotome sinus floor elevation with and without bone grafting. A 5-year prospective study.
Journal
International Journal of Oral Implantology 12:337-346, 2019.
Link
https://www.ardentis.ch/app/uploads/2019/06/190607-Merheb-Soumis.pdf
Abstract
Abstract Objective: The elevation of the sinus floor using osteotomes (OSFE) is a technique aimed at simplifying implant placement in the atrophied posterior maxilla. The need for bone grafting beneath the elevated sinus membrane remains widely debated. The purpose of this study was to compare the evolution of implant stability over 5 years in grafted versus non-grafted sites. Materials and Methods: A total of 12 patients (9 women and 3 men) with an initial bone height (IBH) ≤ 4 mm in posterior maxillary sites were included. Implants (n = 37) were placed using the OSFE technique. According to randomization, the sinuses received either a bone graft (n = 20, control group) or no graft (n = 17, test group). Some patients received both treatments when both of their sinuses met the inclusion criteria. Follow-up evaluations were performed at 1 week, 10 weeks, 12 weeks, then at 1, 3, and 5 years after implant placement. Periapical radiographs were taken, and the Implant Stability Quotient (ISQ) was measured at different time points. Results: At placement, the mean ISQ was 58.9 ± 11.2 for the test group and 53.8 ± 10.2 for the control group; it dropped at 10 weeks post-placement before increasing afterward. Five years after placement, the mean ISQ reached 80.8 ± 4.2 in the control group and 79.7 ± 4.3 in the test group. The difference between groups was not significant. Initial bone height significantly influenced implant stability at the time of placement and at 5 years, but not at other evaluation points. Conclusions: Implants placed with the OSFE technique in non-grafted sites showed equivalent stability to those placed in grafted sites.
Keywords
Keywords: bone graft, implant stability quotient (ISQ), osteotome sinus floor elevation (OSFE), posterior maxilla, resonance frequency analysis (RFA)