D-4 Biomechanical Fracture Healing Simulation for Smart Implants Using Telemetry

Nemchand, Jaya L; Anson, A. W.; Jones, Benjamin; Wilson, Darren; Taylor, Steven W.

doi:10.1016/s0021-9290(10)70155-x

Cited by 1 publication

(3 citation statements)

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“…There are a variety of measurement techniques available for evaluating fracture healing, including ultrasound, direct static measurement, and vibration measurement to measure the stiffness of an internally fixated fractured bone [ 9 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ]. Shah et al [ 16 ] reported on clinical measurements on 11 patients for whom they assessed the change in stiffness of fractured tibial shaft as it healed.…”

Section: Introductionmentioning

confidence: 99%

“…Borchani et al [ 18 ] reported the use of an instrumented fixation device to monitor bone healing by integrating measurement sensors within the internal fixation. Nemchand [ 19 ] investigated wireless telemetered instrumented intramedullary nail implants and reported sufficient sensitivity to monitor strain with callus growth of Young’s Modulus 0.2 MPa. However, their recent instrumentations have yet to produce a reliable set of significant data for potential clinical use.…”

Section: Introductionmentioning

confidence: 99%

“…The existing literature commonly reports on strain readings used to determine the extent of healing [ 18 , 19 , 20 , 21 , 22 ]. However, others have reported that there is no correlation between strain and bone healing [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

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Towards a Non-Invasive Technique for Healing Assessment of Internally Fixated Femur

Chiu

Vien

Russ

et al. 2019

Sensors

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The lack of a quantitative method to adequately assess fractured bone healing that has undergone fixation limits prognostic capabilities on patients’ optimal return to work. This paper addresses the use of vibrational analysis to monitor the state of healing of a plate-screw fixated femur and supplement the current clinical radiographic assessment. This experimental study involves an osteotomised composite femur specimen enclosed by modelling clay to simulate the damping effect of overlying soft tissues. Epoxy adhesives are applied to the fractured region and to simulate the healing process. With the instrumentation described, the cross-spectrum and coherence are obtained and analysed in the frequency domain over a period of time. The results suggest that it is crucial to analyse the cross-spectrum and proposed healing index to quantitatively assess the stages of healing. The results also show that the mass loading effect due to modelling clay did not influence the proposed healing assessment technique. The findings indicate a potential non-intrusive technique to evaluate the healing of fractured femur by utilising the vibrational responses.

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