Relevance of resonance frequency analysis to evaluate dental implant stability: simulation and histomorphometrical animal experiments
- 6 November 2007
- journal article
- Published by Wiley in Clinical Oral Implants Research
- Vol. 19 (1), 9-14
- https://doi.org/10.1111/j.1600-0501.2007.01419.x
Abstract
Resonance frequency analysis (RFA) is applied to evaluate implant stability, and the clinical relevance of this application is accepted. However, a discrepancy between resonance frequency (RF) and other parameters of implant stability such as implant insertion torque and bone mineral density at the insertion site has been reported. In addition, the relation between RF and histological implant-bone contact has not been well documented. To explain this discrepancy and to clarify the relation between RF and histological implant-bone contact, we conducted the present study. A hydroxyapatite-coated implant, 4 mm diameter and 10 mm length, was used. We placed the implant in a small plastic box vertically and fixed the implant in the box with small screws at different height positions. An 'Osstell' transducer was mounted on the implant and RF was measured with or without loosening the screws. Twenty-four implants were placed in the tibiae of four mini-pigs. The animals were sacrificed 1, 2 and 4 weeks after the placement, and the RF of each implant was measured. Ground sections were prepared and implant-bone contact was histomophometrically measured. Loosening the screw at the neck region of the implant remarkably decreased RF compared with the screws of the other regions. Correlation between RF and implant-bone contact, which was measured all around the implant, was not significant (r=0.221, P=0.299). However, the correlation coefficient increased to '0.361' when implant-bone contact was measured at the neck of the implant (P=0.0835), although these two parameters were not statistically correlated. Although RF did not correlate with histological implant-bone contact, the present results demonstrated that a connection between the implant and bone at the neck region of the implant affects RF the most effectively, further suggesting the superiority of RFA in the process of implant treatment and the follow-up. The present results could explain the discrepancy between RFA and other parameters of implant stability.Keywords
This publication has 22 references indexed in Scilit:
- Implant design and intraosseous stability of immediately placed implants: a human cadaver studyClinical Oral Implants Research, 2004
- Influence of implant taper on the primary and secondary stability of osseointegrated titanium implantsClinical Oral Implants Research, 2004
- Resonance frequency analysis of implants subjected to immediate or early functional occlusal loadingClinical Oral Implants Research, 2004
- Implant stability measurement of delayed and immediately loaded implants during healing.Clinical Oral Implants Research, 2004
- Implant stability and histomorphometry: a correlation study in human cadavers using stepped cylinder implantsClinical Oral Implants Research, 2003
- A comparison between cutting torque and resonance frequency measurements of maxillary implantsInternational Journal of Oral & Maxillofacial Surgery, 1999
- Measurements of stability changes of titanium implants with exposed threads subjected to barrier membrane induced bone augmentation. An experimental study in the rabbit tibia.Clinical Oral Implants Research, 1997
- Resonance frequency measurements of implant stability in viva. A cross‐sectional and longitudinal study of resonance frequency measurements on implants in the edentulous and partially dentate maxilla.Clinical Oral Implants Research, 1997
- Implant‐retained mandibular overdentures with immediate loadingClinical Oral Implants Research, 1997
- Quantitative determination of the stability of the implant‐tissue interface using resonance frequency analysisClinical Oral Implants Research, 1996