Loading…
This event has ended. Visit the official site or create your own event on Sched.
Welcome to ICSV26!
Back To Schedule
Monday, July 8 • 17:30 - 17:50
FINITE ELEMENT MODELING OF THE REFLECTION OF AN ULTRASONIC WAVE ON THE BONE-IMPLANT INTERFACE

Log in to save this to your schedule, view media, leave feedback and see who's attending!

Feedback form is now closed.
Quantitative ultrasound can be used to characterize the evolution of the bone-implant interface (BII), which is a complex system due to the implant surface roughness and to partial contact between bone and the implant. The aim of this study is to derive the main determinants of the ultrasonic response of the BII. The influence of i) the surface roughness parameters and ii) the thickness W of a soft tissue layer on the reflection coefficient R of the BII was investigated using a two-dimensional finite element model. First, the implant surface roughness was modeled by a sinusoidal function with varying amplitude h and spatial frequency L. R is shown to increase from around 0.55 until 0.9 when k.W increases from 0 to 1 and to be constant for k.W>1, where k is the wavenumber in the implant. These results allow to show that R depends on the properties of bone tissue located at a distance comprised between 1 and 25 µm from the implant surface. Second, actual implant profiles were considered. When W increases from 0 to 150 µm, R increases from values in the range [0.45; 0.55] to values in the range [0.75; 0.88] according to the roughness parameters. An optimization method was developed to determine the sinusoidal roughness profile leading to the most similar ultrasonic response for all values of W compared to the original profile. The results show that the difference between the ultrasonic responses of the optimal sinusoidal profile and of the original profile was lower to typical experimental errors. The results provide a better understanding of the ultrasonic response of the BII, which may be used in future numerical simulation realized at the scale of an implant.

Moderators
PB

Pierre Belanger

Professor, Pierre Belanger

Authors
avatar for Guillaume Haiat*

Guillaume Haiat*

Laboratoire MSME UMR CNRS 8208 Faculté des Sciences et Technologies UPEC
Guillaume Haiat is a senior research director in the CNRS and an adjunct professor in the ETS Montreal. He graduated from the Ecole Polytechnique in 1998 in physical acoustics. He defended his PhD study at the French Atomic Energy Commission in 2004 in the domain of ultrasound non-destructive... Read More →


Monday July 8, 2019 17:30 - 17:50 EDT
Westmount 1