Accurate diagnosis of hip prosthesis loosening using a vibrational technique

Georgiou, Andy; Cunningham, J L

doi:10.1016/s0268-0033(01)00002-x

Cited by 71 publications

(90 citation statements)

References 8 publications

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“…Therefore NF analysis method is not influenced by the impact excitation force, which is important in amplitude related method. 9,17,18 Secondly, the accelerometer can be easily attached to the abutment. Thirdly, the weight of the accelerometer is much less than the implant system, therefore its mass has minimal effect on the NF measurement.…”

Section: Introductionmentioning

confidence: 99%

Natural Frequency Analysis of Osseointegration for Trans-femoral Implant

Shao

Crocombe

et al. 2007

Ann Biomed Eng

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Osseointegration trans-femoral implants are a new orthopaedic anchoring method to attach prosthetic limbs. The clinical success of this promising technique depends on the effectiveness of osseointegration achieved after implantation. The aim of this study is to use the resonant characteristics of the implant system to determine the changes in stability as a reflection of boundary condition of the implant. With a small mechanical excitation, Vibration responses of the trans-femoral implant to a small mechanical excitation were measured using an accelerometer and the vibration signal was analyzed using Fast Fourier Transform (FFT) software to obtain the fundamental natural frequency (NF) of the implant system. In-vitro study was conducted using different silicone rubbers to simulate the interface condition. The result showed that a high NF corresponded to a high elastic modulus of the interface material between the implant and bone. A preliminary in-vivo study with one osseointegration trans-femoral implant patient showed that there was a decrease of NF after initial weight bearing rehabilitation. After continued weight bearing, the NF gradually returned to the pre-loading level at around day 24 and the general trend of the NF reached a stable state 38 days after the first weight bearing exercise.

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Section: Introductionmentioning

confidence: 99%

Natural Frequency Analysis of Osseointegration for Trans-femoral Implant

Shao

Crocombe

et al. 2007

Ann Biomed Eng

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“…Several groups have attempted measurement of nonlinear parameters at an interface bone/hip prosthesis. 4,5 These studies are promising but are primarily based on a single nonlinear method: the measurement of harmonic amplitudes in the frequency domain. Furthermore, most of these studies are only conducted for extreme cases of stability.…”

mentioning

confidence: 99%

Nonlinear ultrasound: Potential of the cross-correlation method for osseointegration monitoring

Rivière

Haupert

Laugier

et al. 2012

The Journal of the Acoustical Society of America

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Recently the concept of probing nonlinear elasticity at an interface prosthesis/bone has been proposed as a promising method to monitor the osseointegration/sealing of a prosthesis. However, the most suitable method to achieve this goal is a point of debate. To this purpose, two approaches termed the scaling subtraction method and the cross-correlation method are compared here. One nonlinear parameter derived from the cross-correlation method is as sensitive as a clinical device based on linear elasticity measurement. Further, this study shows that cross-correlation based methods are more sensitive than those based on subtraction/addition, such like pulse inversion and similar methods.

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“…Currently sensitivity and specificity of vibration analysis in THR can only be estimated. Georgiou et al stated a 20 % higher sensitivity measured with vibration analysis (80 %) than with radiographs (60 %) (Georgiou et al, 2001). The finite element analysis of Qi et al showed that a loose THR can be identified reliable if 1/3 of the femoral component has no direct bone contact (Qi et al, 2003).…”

Section: Vibrometrymentioning

confidence: 99%

“…Nevertheless detailed research into simulation of different loosening states and significant test results are expected. Furthermore the excitation has to be optimized in order to avoid pressure pain induced by the electrodynamic shaker (Georgiou et al, 2001).…”

Section: Vibrometrymentioning

confidence: 99%