Biomechanical Analysis of Staples for Epiphysiodesis

Frydrýšek, Karel; Čepica, Daniel; Halo, Tomáš; Skoupý, Ondřej; Pleva, Leopold; Madeja, Roman; Pometlová, Jana; Losertová, Monika; Koutecký, Jan; Pavel, Michal; Havlas, Vojtěch; Kraus, Simon; Dominik, Ďurica; Kateřina, Peterek Dědková; Pagáč, Marek; Krpec, Pavel; Osemlak, Paweł

doi:10.3390/app12020614

Cited by 5 publications

(2 citation statements)

References 30 publications

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“…Regarding the 3D modeling of the tibia, there is a trend in the literature for using 3D bone models without taking into account the real heterogeneous structure of human bones [28,29]. Given the use of such models, a number of important research limitations may arise.…”

Section: Three-dimensional Modeling Of the Tibia Taking Into Account ...mentioning

confidence: 99%

A Computer-Assisted Approach Regarding the Optimization of the Geometrical Planning of Medial Opening Wedge High Tibial Osteotomy

et al. 2022

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Opening wedge high tibial osteotomy (OWHTO) is a surgical procedure often used to eliminate the effects of knee osteoarthritis, a disease that is becoming more widespread worldwide. Optimizing the geometric planning of this operation is a very important preparatory step for the success of the intervention and rapid postoperative recovery. This optimization is performed in two main directions. The first direction evaluates the intraoperative behavior of the tibia during the osteotomy by optimizing four geometric parameters that characterize geometric planning. The second direction aims at a postoperative evaluation of the flat tibia-osteosynthesis assembly taking into account the optimal position on the medial–lateral articular line through which the corrected mechanical axis of the tongue passes and implicitly offloads the transfer from the medial area to the side of the knee. The research methods used are exclusively computer-assisted such as: computer-aided design (hereinafter CAD) for geometric modeling of the tibia taking into account the real bone structure, the finite element method (hereinafter FEM) for performing numerical analyses and design of the experiment (hereinafter DOE) for the design of the research. The results obtained are eloquent and clearly presented and can be important elements for orthopedic doctors at the geometric planning stage of the OWHTO.

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Section: Three-dimensional Modeling Of the Tibia Taking Into Account ...mentioning

confidence: 99%

A Computer-Assisted Approach Regarding the Optimization of the Geometrical Planning of Medial Opening Wedge High Tibial Osteotomy

et al. 2022

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“…For example, in steel, we distinguish the components ferrite, martensite, perlite, and austenite, which may also include alloys. We can arrange the components differently, with different grain sizes and different mechanical microproperties, which fundamentally affect the macroscopic mechanical properties and behaviour of steel, which is the same for other anorganic materials and biological tissues (wood, bones), which are all of a hierarchical structure with the internal arrangement, configuration or architecture of the material [ 1 , 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Parameters Influence on the Dynamic Properties of Polymer-Matrix Composites Reinforced by Fibres, Particles, and Hybrids

2022

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In this paper, we present an extensive experimental study on the dynamic mechanical properties of composites with polymer matrices, as well as a quantification of the parameters that influence these properties. Polymer-composite matrices make it possible to form any reinforcement arrangement of fibres, particles, and layers, which makes it possible to form composite materials with certain dominant mechanical properties according to the internal arrangement for the application. In this study, we focused on the dynamic properties (i.e., damping parameters, such as the loss factor (tan d), logarithmic decrement (λ), storage modulus (E′), and loss modulus (E″)) of composites with polymer matrices, including parameters such as the fibre material, fabric weaving, fibre orientation, temperature, frequency, particle size, volume of short fibres, and epoxy resin type. If other articles focus on one type of composite and 1–2 parameters, then the benefit of this article lies in our analysis of 8 mentioned parameters in the experimental analysis of 27 different types of composites with polymer matrices. The tested fibre materials were glass, aramid, and carbon; the tested woven fabrics were twill, plain, unidirectional, and satin; the temperature range was from −50 to +230 °C; the frequency was 1 Hz and 10 Hz; the particle size was 0.1–16 mm; the volume percentages of the short fibres were 3, 6, and 12 vol.% of the hybrid polymer composites and the type of polymer matrix. We used the free-damped-vibration method with vibration dynamic signal analysis and the forced-damped vibration of dynamic mechanical thermal analysis for testing. We ranked the parameters that influence the dynamic vibration properties according to the effects. Among sets of results provided in the paper, considering the storage modulus, loss modulus, and loss factor, the best results of the fibre composites were for aramid-fibre-reinforced polymers, regardless of the weave type, with an advantage for unidirectional fabric. The best results of the particle composites were for those with fine filler sizes that incorporated the short fibres.

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Lower limb coronal malalignment correction by percutaneous osteotomy and schanz screws fixation

Emara,

Diab,

Essa

et al. 2024

Journal of Pediatric Orthopaedics B

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Pediatric knee deformities are common, and the classic treatment is corrective osteotomy. The aim of this study to assess the safety and efficacy of percutaneous low-energy osteotomy and casting with shanz screws fixation in treatment of Genu varum in children equal or younger than 7 years. This is a prospective nonrandomized case series study was conducted. A total of 38 patients (total of 60 limbs: 36 varus and 24 valgus) were treated by percutaneous low-energy osteotomy and casting with shanz screws fixation and observed over 2–5 years. Clinical and radiological outcomes were evaluated at the end of follow-up period by standing scanogram which enabled tibiofemoral angles and the mechanical axis to be measured and the rate of complications. There was a statistically significant improvement of the radiographic parameters in the form of tibiofemoral angle and MAD. Clinically, all the cases were completely corrected just one patient (two limbs) complicated by over-correction but statically non-significant and. pin tract infection in shanz screws fixation was noticed in one Patient. Percutaneous low-energy osteotomy and casting with shanz screws fixation is a simple, safe, and effective method in dealing with 7 years and younger children with pathological knee deformities. Level of evidence: Therapeutic level IV.

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Biomechanical Analysis of Staples for Epiphysiodesis

Cited by 5 publications

References 30 publications

A Computer-Assisted Approach Regarding the Optimization of the Geometrical Planning of Medial Opening Wedge High Tibial Osteotomy

A Computer-Assisted Approach Regarding the Optimization of the Geometrical Planning of Medial Opening Wedge High Tibial Osteotomy

Parameters Influence on the Dynamic Properties of Polymer-Matrix Composites Reinforced by Fibres, Particles, and Hybrids

Lower limb coronal malalignment correction by percutaneous osteotomy and schanz screws fixation

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