Modelling the Tibial Bone Using CAD Techniques, Starting from the 3D Scan Model

Balaşa, Mihai-Constantin; Mihai, Simona; Filip, Viviana; Negrea, Alexis-Daniel; Tomescu, Gheorghiţa

doi:10.1007/978-3-319-96358-7_16

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…In the process of creating the virtual tibia model ( Figure 2 C), a digital model was used as a reference model ( Figure 2 B), and it was obtained by scanning a real bone ( Figure 2 A) [ 35 , 36 ]. The virtual model that we obtained had distinct material properties assigned to it, determined by the level of the bone and considering the following specifications ( Figure 3 ): the tibia (as most long bones) is formed by a shell of compact bone substance, covering a cancellous bone substance at the two proximal and distal parts, and having the medullary canal in the center.…”

Section: Methodsmentioning

confidence: 99%

Tibial Stem Extension versus Standard Configuration in Total Knee Arthroplasty: A Biomechanical Assessment According to Bone Properties

et al. 2022

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Background and Objectives: This study’s purpose was to examine the benefit of using a tibial extension in the primary operation of total knee arthroplasty (TKA). This is important because it is not a common practice to use the extension in a primary TKA, a standard configuration offering sufficient stability and good long-term survivorship. The following question arises: which situation requires the use of a standard configuration implant (without a stem) and which situation requires using the extension? Materials and Methods: The opportunity to use the tibial extension in the primary TKA was analyzed in correlation to the tibial bone structural properties. Using finite elements (FEs), the virtual model of the tibial bone was connected to that of the prosthetic implant, with and without a stem, and its behavior was analyzed during static and dynamic stresses, both in the situation in which the bone had normal physical properties, as well as in the case in which the bone had diminished physical properties. Results: The maximum stress and displacement values in the static compression regime show that adding a stem is only beneficial to structurally altered bone. Compression fatigue was reduced to almost half in the case of altered bone when adding a stem. Dynamic compression showed slightly better results with the tibial stem in both healthy and degraded bone. Conclusions: It was concluded that, if the bone is healthy and has good structural properties, it is not necessary to use the tibial extension in the primary operation; and if the bone has diminished physical properties, it is necessary to use the tibial extension at the primary operation, enhancing the stability, fixation, and implant lifespan.

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Section: Methodsmentioning

confidence: 99%

Tibial Stem Extension versus Standard Configuration in Total Knee Arthroplasty: A Biomechanical Assessment According to Bone Properties

et al. 2022

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“…This type of analysis is possible with the help of CAD techniques and is the subject of this paper. [4] In order to study the static and dynamic mechanical behaviour of the tibia-knee implant assembly, we used the Solid Works software to create the virtual model of a 320 mm-long tibial bone (based on an existing physical model which was previously 3D scanned) with the thickness of the cortical bone (i.e., the compact outer surface) varying between 0.8 mm (at the extremities, in the knee and the ankle areas) and 4 mm (in the middle area) [5]. The same software was used to create the components of the implant (based on an existing physical model of a widely-used standard prosthesis), including the cement used for fixation [6].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Static and Dynamic Mechanical Behavior of a Tibial Bone-Knee Implant Assembly Without a Tibial Extension

2019

IJOMAM

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The ever-growing number of total knee replacement (TKR) surgical procedures has brought a proportional increase in the number of knee replacement revision operations. Among the causes of the early failure of a knee implant are the weakening and displacement of the tibial component. To avoid revision surgery and extend the lifespan of the implant, it is really useful to perform a finite element analysis in order to identify the areas that may be prone to cause the weakening of the tibial component. The purpose of this paper is the virtual modeling of the tibia-knee implant assembly and the analysis of its mechanical behavior both in the static and the dynamic regime. For this purpose, we will look at the case of an implant without tibial extension and analyze the healthy bone in comparison with the osteoporotic bone. The results from the static stress, fatigue, linear and nonlinear dynamic stress tests confirm that the healthy bone has a higher mechanical strength and a lower degree of damage than the affected bone, under the same stress conditions.

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Analysis of the Static and Dynamic Mechanical Behavior of a Tibial Bone-Knee Implant Assembly Without a Tibial Extension

Balaşa

Filip

2019

Proceedings of the International Conference of Mechatronics and Cyber-MixMechatronics – 2019

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Modelling the Tibial Bone Using CAD Techniques, Starting from the 3D Scan Model

Cited by 5 publications

References 6 publications

Tibial Stem Extension versus Standard Configuration in Total Knee Arthroplasty: A Biomechanical Assessment According to Bone Properties

Tibial Stem Extension versus Standard Configuration in Total Knee Arthroplasty: A Biomechanical Assessment According to Bone Properties

Analysis of the Static and Dynamic Mechanical Behavior of a Tibial Bone-Knee Implant Assembly Without a Tibial Extension

Analysis of the Static and Dynamic Mechanical Behavior of a Tibial Bone-Knee Implant Assembly Without a Tibial Extension

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