Determination of implant stability by resonance frequency analysis device during early healing period

Aim: The aim of the present study is to evaluate the implant stability determined by Osstell Mentor® resonance frequency analysis unit during initial healing period with different bone density and whether resonance frequency analysis (RFA) can be integrated into the routine clinical evaluation to determine the implant stability. Materials and Methods: To measure the implant stability, 24 patients with an age group of 20 yrs to 40 yrs were included in the study. In all patients implants were placed by one stage technique using life care dental implants. RFA was measured at the time of implant placement, 2, 4, 8, and 12 weeks by using Osstell Mentor® device. Bone density was classified according to Lekholm and Zarb index. Results: The overall mean minimum RFA value at the time of implant placement was 66.25 + 9.6 which gradually decreased to 63.25 + 11.4 at 4 weeks and gradually increased to 68.50 + 10.2 after 3 months. Mandibular implants showed higher values ranging from 68 to 72 compared to maxillary implants which ranged from 62 to 65. Type II bone showed higher values than type III bone. Statistical analysis was done by SPSS software version 20. Conclusion: RFA by using Osstell TM mentor device is a non-invasive intraoral method designed to reflect the bone/implant interface and hence may be useful in documenting clinical implant stability and outcome of implant treatments. This test has been proven reliable for detecting alterations in implant stability during early healing and is sensitive enough to identify differences in implant stability based on bone density at the implant recipient site.