Objectively Assess Implant Stability
The ISQ Scale
ISQ, or Implant Stability Quotient, is a scale from 1 to 100 and is a measure of the stability of an implant. The ISQ scale has a non-linear correlation to micro mobility. With more than 700 scientific references, we now know that high stability means >70 ISQ, between 60-69 is medium stability and < 60 ISQ is considered as low stability.
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The Technique Behind Osstell
Resonance Frequency Analysis (RFA) is the measurement of the frequency with which a device vibrates. There are several detection methods for the resonance frequency, one of them is to listen to the sound of the vibration frequency in the audible range. By comparing resonance frequencies, the stability of a dental implant can be determined as the resonance frequency changes with different stabilities.
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How ISQ Correlates to Torque
Torque is sometimes used to describe the stability of an implant. However, torque does not necessarily correlate to implant stability. Torque measures the rotational friction between the implant and the bone combined with the force required to cut the bone if that is the case, and the pressure force from the surrounding bone.
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How ISQ correlates to BIC
BIC, or Bone to Implant Contact, is the percentage of the implant surface in contact with bone on a microscopic level.
