Stability of Immediately Placed Single Molar Implants: A Comparison of Damping Capacity and Resonance Frequency Analysis

Seung-Hoon Cha; Kwan-Soo Park; Jae-An Park; Young-Min Kim; Won-Suk Jo; Hye-Ran Choi

doi:10.32542/implantology.2026013

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2026 Vol.30, Issue 3 Preview Page Next Page

Original Article

Stability of Immediately Placed Single Molar Implants: A Comparison of Damping Capacity and Resonance Frequency Analysis

30 September 2026. pp. 157-168

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Abstract

Purpose: This study aimed to compare implant stability measured by resonance frequency analysis (RFA) and damping capacity analysis (DCA) at implant placement and prosthetic impression taking in patients who underwent immediate implant placement following molar extraction.

Materials and Methods: From 2020 to 2022, 45 patients (52 implants) who underwent immediate single-implant placement after molar extraction using a flapless technique at Inje University Sanggye Paik Hospital were evaluated. Implant stability was assessed at implant placement and prosthetic impression taking, using Osstell ISQ (RFA) and AnyCheck (DCA) to obtain implant stability quotient (ISQ) and implant stability test (IST) values, respectively. Linear regression and Bland–Altman analyses were performed to evaluate the relationship and agreement between the two measurement approaches.

Results: All implants were clinically successful without complications during the follow-up period. Both ISQ and IST values increased significantly from implant placement to prosthetic impression taking (ISQ: 76.0 ± 6.8 to 81.8 ± 5.2; IST: 77.6 ± 6.0 to 82.5 ± 3.7; both p < .001), with large effect sizes (Cohen’s d = 1.09 and 0.75, respectively). A positive linear association was observed between ISQ and IST values at both time points. Categorical agreement increased from 69.2% at implant placement to 92.3% at prosthetic impression taking. Bland–Altman analysis showed mean biases of ‒1.54 and ‒0.65 at implant placement and prosthetic impression taking, respectively, neither of which was statistically significant, with the 95% limits of agreement narrowing over time.

Conclusion: Both Osstell ISQ and AnyCheck demonstrated increasing implant stability over time, with improved agreement as osseointegration progressed. The two devices provided consistent and clinically comparable measurements, suggesting that AnyCheck, like Osstell ISQ, may reliably assess implant stability once osseointegration is established, thereby offering clinicians a broader range of diagnostic options.

Keywords

Dental implants

Immediate dental implant loading

Osseointegration

Resonance frequency analysis

Tooth extraction

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Information

Publisher :The Korean Academy of Oral & Maxillofacial Implantology
Publisher(Ko) :대한구강악안면임플란트학회
Journal Title :Journal of implantology and applied sciences
Journal Title(Ko) :대한구강악안면임플란트학회지
Volume : 30
No :3
Pages :157-168
Received Date : 2026-07-02
Revised Date : 2026-09-04
Accepted Date : 2026-09-11
DOI :https://doi.org/10.32542/implantology.2026013

Journal of implantology and applied sciences ISSN:2765-7833(Print) 2765-7841(Online) 대한구강악안면임플란트학회지

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