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Volume 43 , Issue 4
July/August 2023
Pages e165–e172

Resonance Frequency Analysis to Assess the Stability of Immediate Implants: A Retrospective Clinical Trial

Vincenzo Marchio, DDS/Chiara Cinquini, DDS/Giacomo Derchi, DDS, PhD/Bruno Carlo Brevi, MD/Mario Miccoli, PhD/Antonio Barone, DDS, PhD, MSc

DOI: 10.11607/prd.5971

Adequate implant primary stability is a key factor to obtain osseointegration and can be measured at insertion by insertion torque (IT) and at different timepoints with resonance frequency analysis (RFA), expressed as an implant stability quotient (ISQ). This retrospective study investigated the correlation between ISQ and IT at implant insertion. All patients who were eligible for this single-cohort retrospective clinical trial were treated with an immediate implant. IT parameters were recorded at implant insertion, and ISQ values were recorded at insertion and at 2-, 4-, and 12-month follow-ups. The study comprised 23 patients who received 32 implants. The mean IT value was 46.87 ± 9.66 Ncm (range: 25 to 65 Ncm), and the mean ISQ value at implant insertion was 71.45 ± 4.24 (range: 63 to 78); these values showed a statistically significant correlation (P < .0001). According to the present data and considering the implant design used in this trial, there is a statistically significant and positive correlation between IT and ISQ values. Thus, ISQ can be used as a reliable method to measure implant stability over time.

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