Reflection of an ultrasonic wave on the bone-implant interface: A numerical study of the effect of the multiscale roughness.
J Acoust Soc Am
; 144(1): 488, 2018 07.
Article
em En
| MEDLINE
| ID: mdl-30075648
ABSTRACT
Quantitative ultrasound is used to characterize and stimulate osseointegration processes at the bone-implant interface (BII). However, the interaction between an ultrasonic wave and the implant remains poorly understood. This study aims at investigating the sensitivity of the ultrasonic response to the microscopic and macroscopic properties of the BII and to osseointegration processes. The reflection coefficient R of the BII was modeled for different frequencies using a two-dimensional finite element model. The implant surface roughness was modeled by a sinusoidal function with varying amplitude h and spatial frequency L. A soft tissue layer of thickness W was considered between bone tissue and the implant in order to model non-mineralized fibrous tissue. For microscopic roughness, R is shown to increase from around 0.55 until 0.9 when kW increases from 0 to 1 and to be constant for kW > 1, where k is the wavenumber in the implant. These results allow us 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. For macroscopic roughness, R is highly dependent on h and this dependence may be explained by phase cancellation and multiple scattering effects for high roughness parameters.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Implantes Dentários
/
Análise de Elementos Finitos
/
Interface Osso-Implante
/
Ondas Ultrassônicas
Tipo de estudo:
Diagnostic_studies
Limite:
Humans
Idioma:
En
Revista:
J Acoust Soc Am
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
França