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Parameters of resonance frequency measurement values: a retrospective study of 385 ITI dental implants
Author(s) -
Karl Matthias,
Graef Friedrich,
Heckmann Siegfried,
Krafft Tim
Publication year - 2008
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2007.01462.x
Subject(s) - resonance frequency analysis , mandible (arthropod mouthpart) , dentistry , osseointegration , implant stability quotient , maxilla , implant , medicine , anterior maxilla , anterior teeth , dental implant , orthodontics , surgery , biology , botany , genus
Objectives: There is no proven clinical tool to evaluate the amount of osseointegration and stability around dental implants. Therefore, the aim of this retrospective clinical study was to evaluate resonance frequency analysis values of 385 ITI solid screw implants. Material and methods: Both at implant placement and after healing, implant stability quotients (ISQs) were determined. For statistical analysis, Pearson's correlation coefficients, Welch's two‐sample t ‐tests and paired samples t ‐tests were computed at a level of significance of α=0.05. Results: ISQ values ranged from 39 to 86 at implant placement and from 35 to 89 after healing, showing a significant increase. The highest ISQ values at both stages were obtained in the posterior mandible ( P ≤0.002). After healing, ISQ values in the anterior mandible were significantly higher than in the anterior maxilla ( P =0.005). Implant length had a significant influence on ISQ in the anterior mandible ( P =0) at insertion and in the anterior ( P =0.005) and posterior mandible ( P =0.036) after healing. Implant diameter and ISQ at insertion correlated in the anterior mandible ( P =0.037). After healing, a significant influence was found for all regions, except the posterior maxilla ( P =0.795). With the exception of the anterior maxilla ( P =0.542), ISQ at placement had a significant influence on ISQ after healing. In the anterior maxilla ( P =0.002) and in the posterior mandible ( P =0.007), healing time significantly influenced ISQ after healing. Conclusions: It appears that only repeated ISQ measurements of a specific implant have some diagnostic benefit, although the parameters influencing the absolute values still remain unclear.