Design and Finite Element Analysis of a New Spherical Prosthesis-Elbow Joint Assembly

The paper first presented the stages of obtaining a virtual model of a female patient, aged 13 years and who had multiple dental malpositions. The patient underwent a CT scan, and CT images were initially processed using the InVesalius program and three-dimensional geometries were obtained, both for the mandible and jaw, but also for the dental structure. These primary geometries were processed, edited and transformed using Reverse Engineering techniques in the Geomagic program. Dental alveoli were obtained in SolidWorks using CAD methods and techniques. Bracket elements and orthodontic wires were also generated in SolidWorks. Interference solids have been removed by various processes so that the model is geometrically accurate. Finally, these structures formed of virtual solids recomposed the orthodontic system of the analyzed patient. The custom model was exported to Ansys, where it was analyzed and result maps were obtained. Finally, interesting conclusions and some clinical observations were highlighted.

“…14) and deformation energies (Fig. 15) were obtained, similar simulations in [12][13][14][15][16][17][18][19][20][21].…”

Section: Analysis Of the Mechanical Behavior Of The Personalized Orth...supporting

confidence: 64%

Section: The Three-dimensional Model Of a Patient's Orthodontic Systemmentioning

confidence: 99%

Modeling and Simulation of an Orthodontic System of a Real Patient Starting from CBCT Images

Popa¹,

Dascălu²,

Tarniţă³

et al. 2023

“…For this reason, the primary model was loaded into the Geomagic program, specific to reverse engineering. Figure 2 shows this model loaded in Geomagic [9][10][11][12].…”

Section: The Three-dimensional Model Of a Personalized Dento-maxillar...mentioning

confidence: 99%

A Personalized Three-Dimensional Model of a Patient Using CT Images

Popa¹,

Duță²,

Buciu³

et al. 2023

In order to obtain a personalized three-dimensional model of a patient based on CT images, the InVesalius program was initially used, which performs the initial conversion of the analyzed tissues into a specific engineering file composed of the so-called "point cloud". This "point cloud" was imported into the Geomagic program, in which, using reverse engineering techniques, the "point cloud" was initially transformed into elementary triangular surfaces. These primary geometric structures have been edited, transformed, adapted so that, in the end, perfectly closed surfaces are obtained. It was done in this way, both for the bone structure of the head, but also for the dental structure. These complex geometries were loaded into SolidWorks, where they were originally transformed into virtual solids. These geometric structures were loaded and assembled into SolidWorks and interference solids were removed. Finally, a customized three-dimensional model was obtained on which different normal or pathological situations can be analyzed using kinematic simulations or using the finite element method.

“…The finite element analysis (FEA) applied on virtual models is used more and more in the field of research in orthopedics or traumatology as a modern, efficient and accurate method for studying the behavior of human bones and joints . FEA is often used to study the kinematic and dynamic behavior of the human musculoskeletal system, healthy bones, broken and implanted bones [1][2][3][4], as well as normal, osteoarthritic or prosthetic joints of lower limbs [5][6][7][8][9][10][11] and upper limbs [12][13][14][15][16][17][18]. FEA allows researchers to test virtual human bones, joints, bone-implants and joints-implants assemblies in order to study their biomechanical behavior or to design new implants and perform their optimization [2-4, 11, 15, 17].…”

Section: Introductionmentioning

confidence: 99%

Stresses in Prosthetic Elbow Joint During Flexion-Extension Movement

Tarnita,

Popa,

Boborelu

et al. 2023

The present paper aims to study the virtual behavior of a prosthetic elbow joint. The values and distribution of stresses in the prosthetic elbow joint by using FEA on the 3D virtual model during flexion-extension movement under the solicitation of a vertical external force are obtained. They are compared with those developed on the human healthy elbow joint. Solid Works software is used in order to obtain the virtual model and Visual Nastran to obtain the von Mises stress by finite element analysis. The maximum stresses values in metallic components of prosthetic elbow are about 4-5 times higher than those obtained in healthy elbow, for a flexion angle equal to 90 degrees.