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Vibro-acoustic characterization of the bone-implant system during insertion

The Journal of the Acoustical Society of America 2023年第3_SUPPLEMENT期153卷 A53-A53页

作者： Anne-Sophie Poudrel Giuseppe Rosi Vu-Hieu Nguyen Guillaume Haiat Multiscale Modeling and Simulation Lab. CNRS Créteil France Multiscale Modeling and Simulation Lab. CNRS Laboratoire MSMS Faculté des Sci. UPEC 61 Ave. du gal de Gaulle Creteil 94010 France guillaume.haiat@univ-paris-est.fr

The femoral stem primary stability achieved by the impaction of a beam called “ancillary” attached to the implant during its insertion is an important factor of success in cementless surgery. However, surgeons rely on their proprioception, making the process subjective. The use of experimental modal analysis (EMA) without sensor nor probe fixation on the implant or on the bone is a promising non-destructive approach to determine implant stability. This study investigates whether EMA performed directly on a beam, which is temporary fixed to the implant during its insertion, could provide information on the boundary condition, which corresponds to the implant stability. A cementless femoral stem was inserted into 10 bone phantoms of human femurs and EMA was carried out on the ancillary using a dedicated impact hammer for each insertion step. Two bending modes were identified in the frequency range 400–8000 Hz for which the resonance frequency was shown to be sensitive to the insertion step and to the bone-implant interface properties. A significant correlation was obtained between the two modal frequencies and the implant insertion depth (R² = 0.95 ±0.04 and R² = 0.94 ±0.06). This study opens new paths towards the development of noninvasive vibration-based evaluation methods to monitor cementless implant insertion.

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A quantitative ultrasound method to estimate dental implant stability

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The Journal of the Acoustical Society of America 2017年第5_SUPPLEMENT期141卷 3887-3887页

作者： Romain Vayron Vu-Hieu Nguyen Romain Bosc Guillaume Haiat Multiscale Modeling and Simulation Lab. CNRS Créteil France Multiscale Modeling and Simulation Lab. CNRS Creteil France Université Paris-Est Créteil INSERM U955 IMRB Creteil France Multiscale Modeling and Simulation Lab. CNRS Laboratoire MSMS Faculté des Sci. UPEC 61 Ave. du gal de Gaulle Creteil 94010 France guillaume.haiat@univ-paris-est.fr

Dental implants are widely used clinically. However, implant failures, which may have dramatic consequences, still occur and remain difficult to anticipate. Accurate measurements of implants biomechanical stability are of interest since they could be used to improve the surgical strategy. The aim of this paper is to determine whether quantitative ultrasound can be used to determine dental implant stability. Firstly, an implant was initially completely inserted in the proximal part of a bovine humeral bone sample. The 10 MHz ultrasonic response of the implant was then measured and a quantitative indicator was derived. Then, the implant was unscrewed by 2π radians and the measurement was realized again. The value of indicator significantly increases as a function of the number of rotation. The results show that bone quantity in contact with the implant has a significant influence on its ultrasonic response. Secondly, a 3D finite element model was employed and the geometrical configuration was assumed to be axisymmetric. The numerical results show that the implant ultrasonic response changes significantly when a liquid layer is located at the implant interface. This study paves the way for the development of an ultrasonic tool to be used for the monitoring of osseointegration.

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Determination of the acetabular cup implant stability using an acoustic method based on the impact between the hammer and the ancillary

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The Journal of the Acoustical Society of America 2017年第5_SUPPLEMENT期141卷 3831-3831页

作者： Giuseppe Rosi Vu-Hieu Nguyen Antoine Tijou Romain Bosc Guillaume Haiat Multiscale Modeling and Simulation Lab. CNRS Creteil France Université Paris-Est Créteil INSERM U955 IMRB Creteil France Multiscale Modeling and Simulation Lab. CNRS Laboratoire MSMS Faculté des Sci. UPEC 61 Ave. du gal de Gaulle Creteil 94010 France guillaume.haiat@univ-paris-est.fr

The hemispherical acetabular cup (AC) implant is used during total hip replacement surgery and is inserted in the acetabulum using impacts applied with an orthopedic hammer. However, the assessment of the AC implant primary stability remains difficult. The aim of this study was to investigate the feasibility of retrieving the AC implant stability based on impact signal analyses. AC implants with various sizes were inserted in 12 cadaveric hips following the same protocol as the one employed in the clinic. An instrumented hammer was then used to measure the variation of the force as a function of time produced during the impact between the hammer and the ancillary. Then, an indicator I was determined for each impact based on the impact momentum. A significant correlation (R² = 0.69) was found between I and the pull-out force. Moreover, a tridimensional axisymmetric finite element model was developed to simulate the insertion processes of the AC implant into bone tissue during impacts. The variation of the force applied between the hammer and the ancillary was analyzed and the numerical results were compared with the experimental results. The results show the potential of impact analysis to retrieve the bone-implant contact properties.

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Assessment of dental implant stability: Coupling modeling and experimental approaches

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The Journal of the Acoustical Society of America 2017年第4_SUPPLEMENT期142卷 2566-2566页

作者： Romain Vayron Vu-Hieu Nguyen Guillaume Haiat Multiscale Modeling and Simulation Lab. CNRS Laboratoire MSMS Faculté des Sci. UPEC 61 Ave. du gal de Gaulle Creteil 94010 France guillaume.haiat@univ-paris-est.fr

Dental implants are widely used clinically but implant failures, which may have dramatic consequences, still occur and remain difficult to anticipate. Accurate measurements of implants biomechanical stability are of interest since they could be used to improve the surgical strategy. The aim of this work is to develop a medical device capable of estimating dental implant stability using quantitative ultrasound. To do so, our approach consists in coupling modeling and experimental methods. Firstly, an implant was initially completely inserted in the proximal part of a bovine humeral bone sample. The 10 MHz ultrasonic response of the implant is then measured and a quantitative indicator is derived. Then, the implant is unscrewed by 2π radians and the measurement was realized again. The value of indicator significantly increases as a function of the number of rotation. The results show that bone quantity in contact with the implant has a significant influence on its ultrasonic response. Secondly, a 3D finite element model is employed and the geometrical configuration is assumed to be axisymmetric. The numerical results show that the implant ultrasonic response changes significantly when a liquid layer is located at the implant interface.

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Acoustical estimation of endosseous implant stability: Finite element modeling and experimental validation

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The Journal of the Acoustical Society of America 2016年第4_SUPPLEMENT期140卷 3191-3191页

作者： Vu-Hieu Nguyen Romain Vayron Guillaume Haiat Multiscale Modeling and Simulation Lab. CNRS Laboratoire MSME UMR 8208 fac des Sci. UPEC 61 av du gal de Gaulle Creteil France vu-hieu.nguyen@u-pec.fr

Various endosseous implants are widely used in orthopedic and dental surgeries. However, failures are observed, which may have dramatic consequences and are often due to a loss of implant stability. The aim of this presentation is to describe two acoustical methods developed to assess the stability of different implants. First, a quantitative ultrasound method was used to determine the stability of dental implants. A monoelement 10 MHz transducer is screwed into the implant and the signal is processed to obtain an indicator. The method was first validated in implants embedded in biomaterials used as bone substitutes, then in vitro and eventually in vivo by comparison with histology. A 3D FEM was developed to optimize the device conception and carry out sensitivity studies. Second, an impact hammer was used in order to investigate whether the AC implant primary stability can be evaluated using such approach. The method was first validated in vitro and in cadaveric experiments. The results showed that an indicator based on the impact momentum may be correlated to the implant pull-out force. A 3D FEM was also developed to analyze and better understand experimental results. This study shows the potential of acoustical methods to assess non-invasively implant stability.

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Quantitative ultrasound measurements in trabecular bone using the echographic response of a metallic pin: Application to spine surgery

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The Journal of the Acoustical Society of America 2015年第3_SUPPLEMENT期138卷 1798-1798页

作者： Guillaume Haiat Yoshiki Nagatani Seraphin Guipieri Didier Geiger Multiscale Modeling and Simulation Lab. CNRS Laboratoire MSMS Faculté des Sci. UPEC 61 Ave. du gal de Gaulle Creteil 94010 France guillaume.haiat@univ-paris-est.fr Kobe City College of Technol. Kobe Japan Multiscale modeling and simulation Lab. CNRS Creteil France

Bone quality is an important parameter in spine surgery, but it remains difficult to be assessed clinically. The aim of this work is to demonstrate the feasibility of a QUS method to retrieve bone mechanical properties using an echographic technique taking advantage of the presence of a metallic pin inserted in bone tissue. To do so, an experimental validation is performed and acoustical modeling is used in order to assess the influence of experimental errors. A metallic pin was inserted in bone tissue perpendicularly to the transducer axis. The echographic response of the bone sample was determined and the echoes of the pin inserted in bone tissue and in water were compared to determine speed of sound (SOS) and broadband ultrasonic attenuation (BUA), which was compared to bone volume fraction (BV/TV). A 2-D finite element model was developed to assess the effect of positioning errors. Moreover, the coupling of finite difference time domain simulation with high resolution imaging technique was used to understand the interaction between an ultrasonic wave and the bone microstructure. A significant correlation between SOS and BV/TV was found (R² = 0.6). The numerical results show the relative robustness of the measurement method, which could be useful to estimate bone quality intraoperatively.

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Assessing dental implant stability using quantitative ultrasound methods: Experimental approach and numerical validation

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The Journal of the Acoustical Society of America 2015年第3_SUPPLEMENT期138卷 1799-1799页

作者： Romain Vayron Guillaume Haiat Multiscale Modeling and Simulation Lab. CNRS Laboratoire MSMS Faculté des Sci. UPEC 61 Ave. du gal de Gaulle Creteil 94010 France guillaume.haiat@univ-paris-est.fr

Dental implants are widely used for oral rehabilitation. However, there remain risks of failure that are difficult to anticipate. The objective of this study is to investigate the potentiality of quantitative ultrasound (QUS) to assess dental implant implant stability. To do so, the implant is initially completely inserted in the proximal part of a bovine humeral bone sample. The 10 MHz ultrasonic response of the implant is then measured and a quantitative indicator I is derived based on the rf signal obtained. Then, the implant is unscrewed by 2π radians and the measurement is realized again. The procedure is repeated seven times and the indicator is derived after each rotation of the implant. Analysis of variance (ANOVA) (p < 10−5) tests revealed a significant effect of the amount of bone in contact with the implant on the distribution of I. In parallel, a finite element model is developed in order to model the ultrasonic propagation in the implant surrounded by bone tissue. The results show the feasibility of our QUS device to assess implant primary stability. A good agreement is obtained between experimental and numerical results. This study paves the way for the development of a new approach in oral implantology.

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