Biomechanical Evaluation of Syndesmotic Screw Design via Finite Element Analysis and Taguchi's Method

Er, Mehmet Serhan; Verim, Ozgur; Eroglu, Mehmet; Altınel, Levent; Gökçe, Barış; Taşgetiren, Süleyman

doi:10.7547/8750-7315-105.1.14

Cited by 14 publications

(11 citation statements)

References 23 publications

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“…Similarly, Er et al . developed an FE model of an ankle treated with four different types of syndesmotic screws 14. FE analyses were conducted to find the optimal combination of screw parameters using Taguchi’s robust design method 16.…”

Section: Introductionmentioning

confidence: 99%

Parametric Design Optimisation of Proximal Humerus Plates Based on Finite Element Method

et al. 2018

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Optimal treatment of proximal humerus fractures remains controversial. Locking plates offer theoretical advantages but are associated with complications in the clinic. This study aimed to perform parametric design optimisation of proximal humerus plates to enhance their mechanical performance. A finite element (FE) model was developed that simulated a two-part proximal humerus fracture that had been treated with a Spatial Subchondral Support (S3) plate and subjected to varus bending. The FE model was validated against in vitro biomechanical test results. The predicted load required to apply 5 mm cantilever varus bending was only 0.728% lower. The FE model was then used to conduct a parametric optimisation study to determine the orientations of inferomedial plate screws that would yield minimum fracture gap change (i.e. optimal stability). The feasible design space was automatically identified by imposing clinically relevant constraints, and the creation process of each FE model for the design optimisation was automated. Consequently, 538 FE models were generated, from which the obtained optimal model had 4.686% lower fracture gap change (0.156 mm) than that of the manufacturer’s standard plate. Whereas its screws were oriented towards the inferomedial region and within the range of neck-shaft angle of a healthy subject. The methodology presented in this study promises future applications in patient-specific design optimisation of implants for other regions of the human body.

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Section: Introductionmentioning

confidence: 99%

Parametric Design Optimisation of Proximal Humerus Plates Based on Finite Element Method

et al. 2018

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“…However, our calculations assumed a static case only. In cases of dynamic loading, some overloads that often exceeded the static ones several times could potentially occur [ 23 ]. The finite element modeling calculations showed that regular walking generates loads reaching peak values of 3.2 [ 24 ], landing from a jump from 2 to 12, and running even up to 13-times higher than the body weight [ 25 , 26 ].…”

Section: Discussionmentioning

confidence: 99%

Deformation of the Titanium Plate Stabilizing the Lateral Ankle Fracture Due to Its Overloading in Case of the Young, Obese Patient: Case Report Including the Biomechanical Analysis

et al. 2022

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The number of overweight and obese patients in developed countries is gradually increasing. It was reported that 1287 (64%) out of 2007 adults operated on in 2017 had a body mass index (BMI) greater than 25 kg/m2, and 26.4% even greater than 30, while the BMI of the most obese patient was as high as 57.6 kg/m2. Such distressing statistics raised an issue related to the inadequate durability of implants used for the fixation of bone fractures. Implants for the lower-extremity fractures may not be durable enough to fit the requirements of overweight and obese patients. This case report presents the history of a 23-year-old obese male with a BMI of 38.7, who bent the angularly stabile titanium plate stabilizing his broken lateral ankle and torn distal tibiofibular syndesmosis. Biomechanical analysis showed that the maximal static bending moment registered during one-leg standing was equal to 1.55 Nm. This value was circa one-third of the maximally admissible bending moment for this particular plate (5.34 Nm) that could be transmitted without its plastic deformation. Since dynamic forces exceed static ones several (3–12) times during typical activities, such as walking, climbing the stairs, running, and jumping, unpredictable forces may occur and increase the risk of loosening, bending, and even breaking implants. None of these situations should have occurred for the typical patient’s body mass of 75 kg, or even for the analyzed mass of the young patient (120 kg) who tried to avoid excessive loading during his daily routine. Subsequent implant bending and destabilization of the fracture shows that for the significantly high and still growing number of obese patients, a very strict physical regime should be recommended to prevent overabundant dynamic loads. On the other hand, the geometry of implants dedicated to these patients should be reconsidered.

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“…3,4 It is worth mentioning that screws are one of the most important tools used in orthopedic surgeries like ankle joints surgery. 5 In most cases of ankle surgeries, screws are utilized individually or in a group to keep motionless and intact the injured bone throughout the treatment duration and so, reduction in the anatomical state. [6][7][8][9] The screws used in the syndesmosis impose restrictions on the movement of ankle joints.…”

Section: Introductionmentioning

confidence: 99%

“…These studies have been conducted as clinical trials on patients under treatment, tests on a specific cadaver and numerical modelling like finite element analysis to investigate stress distribution in screws and screw design. 5,8,9,[11][12][13][14][15][16][17][18][19] However, there is no reported work on considering the lifetime of screws and then, estimating the time for failure after the operation and before removing them (the second surgery).…”

Section: Introductionmentioning

confidence: 99%

Predicting ankle joint syndesmotic screw lifetime using finite element and fatigue analysis

Hariri

Mirzabozorg

Esmaeili

et al. 2022

Journal of Orthopaedics, Trauma and Rehabilitation

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After recovery and loading on the patient’s leg, syndesmotic screws mounted on an injured ankle may fail. The main subject of this study is to estimate the lifetime of screws considering the patient’s weight and physical activity. Method: A 3D finite element model of the bone and implemented screws were provided assigning the mechanical properties of ligaments, bones, and screws. Considering axial and tangential physiological loads during the walking phase, the stress and fatigue analyses were performed. Results: The stress distribution had an identical pattern in the screws and all of them experienced the maximum stress during 60–70% of the walking phase. Conclusion: The results of analyses show that body weight has a significant effect on the mounted screw lifetime. Patients with a weight of more than [Formula: see text] kg should prevent applying body load on the operated leg. Conversely, no worry about a patient having less than [Formula: see text] kg body weight.

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Biomechanical Evaluation of Syndesmotic Screw Design via Finite Element Analysis and Taguchi's Method

Cited by 14 publications

References 23 publications

Parametric Design Optimisation of Proximal Humerus Plates Based on Finite Element Method

Parametric Design Optimisation of Proximal Humerus Plates Based on Finite Element Method

Deformation of the Titanium Plate Stabilizing the Lateral Ankle Fracture Due to Its Overloading in Case of the Young, Obese Patient: Case Report Including the Biomechanical Analysis

Predicting ankle joint syndesmotic screw lifetime using finite element and fatigue analysis

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