title: Assessment of Osstell ISQ's reliability for implant stability measurement: a cross-sectional clinical study.
abstract: 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.
  
  
  OBJECTIVE
  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.
  
  
  METHODS
  Two implant 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.
authors.affiliation: Facultad de Odontología, C/ Avicena, s/n, 41009 Sevilla (Spain), jvrios@us.es.
authors.forename: Mariano
authors.initials: M
authors.lastname: Herrero-Climent
authors.forename: Rocio
authors.initials: R
authors.lastname: Santos-García
authors.forename: Reyes
authors.initials: R
authors.lastname: Jaramillo-Santos
authors.forename: Manuel-Maria
authors.initials: MM
authors.lastname: Romero-Ruiz
authors.forename: Ana
authors.initials: A
authors.lastname: Fernández-Palacin
authors.forename: Pedro
authors.initials: P
authors.lastname: Lázaro-Calvo
authors.forename: Pedro
authors.initials: P
authors.lastname: Bullón
authors.forename: Jose-Vicente
authors.initials: JV
authors.lastname: Ríos-Santos
mesh_terms: D001696:Biomechanical Phenomena; D003430:Cross-Sectional Studies; D015921:Dental Implants; D019232:Dental Restoration Failure; D006801:Humans; D015203:Reproducibility of Results; D014732:Vibration
chemical_list: D015921:Dental Implants