Shape memory alloy smart knee spacer to enhance knee functionality: Model design and finite element analysis

Gautam, Arvind; Rani, Asha; Callejas, Miguel A; Acharyya, Swati Ghosh; Acharyya, Amit; Biswas, Dwaipayan; Bhandari, Vasundhra; Sharma, Paresh; Naik, Ganesh R.

doi:10.1109/embc.2016.7592107

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…The elastic modulus of Nitinol used in this study was only approximately 30 GPa, which was lower than that reported in the literatures [36,37,38]. In Taiwan, the available source of the Nitinol alloy is rarer than those of the commonly used titanium and stainless steel alloys.…”

Section: Discussionmentioning

confidence: 61%

Comparison of Mechanical Stability of Elastic Titanium, Nickel-Titanium, and Stainless Steel Nails Used in the Fixation of Diaphyseal Long Bone Fractures

Lee

Chen

et al. 2018

Materials

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Elastic nails made of the nickel-titanium shape memory alloy (Nitinol) have been reported to control bone modeling in animal studies. However, the mechanical stability of the Nitinol nail in the fixation of long bone fractures remains unclear. This study compared mechanical stability among nails made of three materials, namely Nitinol, titanium, and stainless steel, in the fixation of long bone fractures. These three materials had identical shapes (arc length: π/2 and radius: 260 mm). A cylindrical sawbone with a 10-mm gap and fixed with two C-shaped elastic nails was used to examine the stability of the nails. A finite element (FE) model was developed based on the sawbone model. The end cap for elastic nails was not used in the sawbone test but was considered based on a constraint equation in FE simulation. The results of stability tests appeared to depend on the presence or absence of the end cap. In the sawbone test, the titanium nail yielded a higher ultimate force against the applied load than did the stainless steel and Nitinol nails before the gap completely closed; the difference in linear stiffness between the nails was nonsignificant. In FE simulation, the titanium nail produced smaller gap shortening than did stainless steel and Nitinol nails without the end cap; the difference in gap shortening between the nails was minor with the end cap. The titanium elastic nail should be a better choice in managing diaphyseal long bone fractures when the end cap is not used. For Nitinol and stainless steel nails, the end cap should be used to stop the nail from dropping out and to stabilize the fractured bone.

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Section: Discussionmentioning

confidence: 61%

Comparison of Mechanical Stability of Elastic Titanium, Nickel-Titanium, and Stainless Steel Nails Used in the Fixation of Diaphyseal Long Bone Fractures

Lee

Chen

et al. 2018

Materials

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“…However, most researchers adopt the finite element modeling to analyze the total knee joint. Authors in [13] studied the causes of valgus deformity in TKA, and the finite element analysis of using a rotating total knee prosthesis is discussed in [14]. There is little literature on finite element analysis of UKA prosthesis, because UKA is a minimally invasive surgery, which prevents effective finite element pressure scanning.…”

Section: Introductionmentioning

confidence: 99%

A Wireless Trajectory Measurement System for Unicondylar Knee Arthroplasty

Wang

Zhou

et al. 2020

IEEE Trans. Instrum. Meas.

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During unicondylar knee arthroplasty surgery, the tibial prosthesis is fixed and the angle of distal femoral prosthesis relative to the prosthetic gasket is changed to generate the force line trajectory, which is important for doctors to judge the appropriate position of the implants. In this paper, we propose a wireless force line trajectory measurement system for unicondylar knee arthroplasty, which includes the pressure sensors array, the control and processing data circuits, the radio frequency transmitter, and the data recorder. Data from twenty sensors is processed and transmitted wirelessly, and the force line trajectory is displayed on the screen in real-time. The least squares fitting algorithm is proposed, with which we obtain the pressure distribution, the maximum pressure points and the force line trajectory. We adopt field programmable gate array to implement the algorithm with lower-upper decomposition to fit the trajectory faster and transmit less data to save power. The average current consumption of the system is 1.37mA in the operating mode. Dimensions of the data transmission module are length 70mm, width 35mm and height 4mm. The total uncertainty of the system measurement force line trajectory is 0.92mm. Experimental results show that the system meets the requirement of real-time measurement of the force line trajectory during the surgery.

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Shape memory effect of nano-ferromagnetic particle doped NiTi for orthopedic devices and rehabilitation techniques

Gautam

Balouria

Acharyya

et al. 2017

2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

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This paper introduces a novel shape memory alloy (SMA) material for the controllability in the shape recovery of traditional SMA for orthopedic devices and rehabilitation techniques. The proposed material is formed by doping nano-ferromagnetic particle into porous NiTi alloy. The finite element analysis of shape memory effect property of the different distribution of nano-ferromagnetic particle is done and compared for same load and boundary conditions. The comparative analysis of the percentage change in volume deformation when load is released (for 2 step) shows an average of 2.55 % with standard deviation of 1.69 whereas on thermal loading (for 3 step) shows an average of 94.94% with standard deviation of 7.75 for all heterogeneous distribution of nano-particles in porous NiTi alloy. Our findings are, all the different conditions of heterogeneous distributions of nano-ferromagnetic particle doped NiTi alloy exhibits its inherent SME property.

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Shape memory alloy smart knee spacer to enhance knee functionality: Model design and finite element analysis

Cited by 4 publications

References 17 publications

Comparison of Mechanical Stability of Elastic Titanium, Nickel-Titanium, and Stainless Steel Nails Used in the Fixation of Diaphyseal Long Bone Fractures

Comparison of Mechanical Stability of Elastic Titanium, Nickel-Titanium, and Stainless Steel Nails Used in the Fixation of Diaphyseal Long Bone Fractures

A Wireless Trajectory Measurement System for Unicondylar Knee Arthroplasty

Shape memory effect of nano-ferromagnetic particle doped NiTi for orthopedic devices and rehabilitation techniques

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