Abstract : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency
Implant stability testing at various stages of implant therapy by means of resonance frequency analysis is extensively used. The overall measurement outcome is a function of the resulting stiffness of three entities: surrounding bone, bone-implant complex, and implant-Smartpeg complex. The influence of the latter on the overall measurement results is presently unknown. It can be investigated in vitro by use of imbedded implants with mounted Smartpegs. This enables to keep the influence of the two other entities constant and controlled.
The purpose of this study is to verify if a laboratory laser Doppler vibrometry technology-based procedure results in comparable ISQ results after calculation of captured resonance frequency spectra by aid of the Osstell algorithm with direct Osstell IDX device measurements.
A laboratory procedure was engineered to record frequency spectra of resin-imbedded test implants with mounted Smartpegs, after electromagnetic excitation with the Osstell IDX device and laser Doppler vibrometry response detection. Fast Fourier transformation data processing of resonance frequency data resulted in determination of a maximum resonance frequency values allowing calculation of implant stability quotient (ISQ) values using the Osstell algorithm.
Laboratory-based ISQ values were compared to Osstell IDx device-generated ISQ values for Straumann tissue level, Ankylos, and 3i Certain implant systems. For both systems, a correlation coefficient r = 0.99 was found. Furthermore, a clinically rejectable mean difference of 0.09 ISQ units was noted between both datasets.
The proposed laboratory method with the application of the Osstell algorithm for ISQ calculation is appropriate for future studies to in vitro research aspects of resonance frequency analysis implant stability measurements.
Serial posts:
- Abstract : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency
- Background : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency [1]
- Background : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency [2]
- Background : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency [3]
- Methods : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency [1]
- Methods : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency [2]
- Methods : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency [3]
- Results : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency
- Discussion : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency
- Conclusions : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency
- References : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency [1]
- References : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency [2]
- Author information : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency [1]
- Author information : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency [2]
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- Table 1 Published secondary implant stability values for Straumann tissue level RN SLA surfaced implants (Ø = 4.1 mm) : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency
- Table 2 Mean values (± SD) of recorded maximum RF values, calculated indirect ISQ values, and direct recorded ISQ values for Ankylos (A) and Straumann (S) test implants : ISQ calculation evaluation of in vitro laser scanning vibrometry-captured resonance frequency
- Fig. 1. Concept for study of deflection and stiffness aspects of implant-Smartpeg complex by laser Doppler vibrometry. Intentional partial imbedding of implants allows to detect both the deflection of implant and Smartpeg separately at different vertical levels by changing the position of the laser beam : ISQ calculation evaluation of in vitro laser scann
- Fig. 2. Clamped Osstell probe orientated towards a Smartpeg mounted on a test implant. Note the red laser beam dot on the flat surface of the Smartpeg hexagon part : ISQ calculation evaluation of in vitro laser scann
- Fig. 3. Example of a typical autospectrum pointing to a 1 maximum RF based on 1000 measurements in case of a Straumann test implant : ISQ calculation evaluation of in vitro laser scann
- Fig. 4. Scatterplot depicting indirect calculated and direct measured ISQ values of the tested implants : ISQ calculation evaluation of in vitro laser scann