Related Experiment Video
Updated: Jan 28, 2026

Oral Biofilm Formation on Different Materials for Dental Implants
Published on: June 24, 2018
A Critique of Resonance Frequency Analysis and a Novel Method for Quantifying Dental Implant Stability in Vitro
Purpose:
This study assessed the ability of resonance frequency measurements to differentiate the stability of implants with different lengths and diameters, and in different densities of bone. Another objective was to identify an alternative parameter capable of quantifying dental implant stability, thus facilitating greater sensitivity for efficacious detection of compromised or failing implants.
Materials And Methods:
Implants of two different diameters (4 and 5 mm) and six different lengths were individually placed in synthetic bone blocks of three different densities (15, 40/20, and 40 pounds per cubic foot) in combination with two different abutments (short and tall) to evaluate their stability. Resonance frequency measurements were obtained via Osstell ISQ and experimental modal analysis (EMA). The resonance frequency measurements were further confirmed via finite element analysis (FEA) using commercially available software ANSYS.
Results:
Resonance frequencies measured via Osstell ISQ and EMA did not change with respect to the length of the implants. The FEA also confirmed the measured results. FEA simulations further indicated that angular stiffness at the neck of the implant (ie, the base of the abutment) varied considerably with respect to the implant length and diameter. Moreover, the calculated angular stiffness was independent of the type of abutment used.
Conclusion:
The results obtained from resonance frequency analyses did not accurately represent dental implant stability. Changes to implant length and diameter did not affect resonance frequencies. In contrast, angular stiffness at the neck of the implant represented a superior index for quantifying dental implant stability. It not only successfully differentiated stability of implants of both varying lengths and diameters, but also produced quantitative data that was independent of the type of abutments used.
Related Concept Videos
Resonance
Nuclear Stability
To hold positively charged protons together...
RNA Stability
Dose Size and Dosing Frequency: Determination Methods
Frequency-dependent Selection
Stability
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...

