Resumen de Assessment of Osstell ISQ's reliability for implant stability measurement: a cross-sectional clinical study

Mariano Herrero Climent, Rocío Santos García, Reyes Jaramillo Santos, Manuel María Romero Ruiz, Ana Fernández-Palacín, Pedro Lázaro Calvo, Pedro Bullón, José Vicente Ríos Santos

• Resonance frequency analysis (RFA) allows assess implant stability by measuring implant oscillation frequency on the bone. RFA is an objective and non-invasive method for implant stability measurement, although scarce evidence has been provided so far on its reliability.

  Objectives: Assess the Osstell ISQ system's reliability (i.e., its measurement reproducibility and repeatability) by means of the intraclass correlation coefficient (ICC) as statistical method.

  Study Desing: Implants stability registers were completed by means of Osstell ISQ on 85 implants on 23 patients.

  Six measurements were completed on each implant by means of two different SmartPegs (types I and II); that is, three consecutive measurements with each transducer.

  Results: Average ISQ was 72.40, 72.22 and 72.79, and 72.06, 72.59 and 72.82 in the first, second, and third measurements with SmartPegs I and II, respectively. Equal values or differences below three ISQ points were observed in 52.9% and 62.4% of the cases with SmartPegs I and II, respectively. The intraclass correlation coefficient was 0.97 for both SmartPegs, and repeatability and reproducibility also reached 0.97 for both SmartPegs.

  Conclusions: The RFA system Osstell ISQ presents almost perfect repeatability and reproducibility after intraclass correlation coefficient analysis. Osstell ISQ measurements are highly reliable regarding reproducibility.

  Therefore, one measurement proves enough.