ISQ
Pronunciation: eye-ESS-kyoo
Also written as: ISQ — Implant Stability Quotient
Implant Stability Quotient; a dimensionless scale from 1 to 100 used to quantify the primary or secondary stability of a dental implant via resonance frequency analysis.
Full Definition
The Implant Stability Quotient (ISQ) is derived from resonance frequency analysis (RFA), a non-invasive technique that measures the resonance frequency of an implant-transducer assembly (SmartPeg) to estimate implant stability within bone. Values range from 1 to 100, with higher values (typically ≥65–70) indicating greater stability and more favorable conditions for loading. ISQ is reported at implant placement to assess primary stability and at subsequent appointments to track osseointegration progress. Editors should ensure 'ISQ' is always expanded on first use, is presented as an uppercase abbreviation, and is followed by numerical values without a unit symbol (the scale is dimensionless).
Usage
Usage note: Always expand on first use. Present numerical values without a unit symbol — the ISQ scale is dimensionless. Do not confuse with insertion torque (Ncm), which measures resistance during placement rather than post-placement stability.
In Context
- "An ISQ of 72 was recorded at implant placement, supporting the decision to proceed with immediate provisional loading." — Implant surgical report
- "The editor confirmed that 'ISQ' was expanded as 'Implant Stability Quotient' on first mention, per journal style requirements." — Manuscript copy-editing note