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Resonance Frequency Analysis
Resonance Frequency Analysis: A non invasive device based on the principles of resonance frequency analysis (RFA) has been developed to measure primary implant stability and to monitor implant stability over time. This method evaluates the stiffness of the bone implant interface by means of a signal transducer connected to a frequency response organizer. The resonance frequency of the transducer implant unit is calculated from the peak amplitude of the signal and is graphically illustrated on the display of the unit as peak of the frequency-amplitude plot. In addition, an implant stability quotient (ISQ) is displayed as a number between 1 and 100. This ISQ is to quantify the frequency measurements of implants within a range between 3500 and 8500 HZ. ISQ values of a stable osseointegrated implant increases with time, indicating the increase in bone implant contact area. On the other hand, crestal bone loss is correlated with loss of implant stability.
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