scholarly journals 3D-print in the planning of surgical treatment in the case of extraarticular deformity of lower limbs

2021 ◽  
pp. 45-50
Author(s):  
Kostiantyn Romanenko ◽  
Dmytro Prozorovskiy ◽  
Yaroslav Doluda
Keyword(s):  
3D Modeling ◽  
Three Dimensional ◽  
Ct Scanning ◽  
Functional Results ◽  
Lower Limbs ◽  
Three Dimensional Model ◽  
Technical Problems ◽  
3D Print ◽  
Sf 36 ◽  
Post Traumatic

An adequate planning of the curative measures is an important factor providing good functional results in the treatment of consequences of long bones injuries, in particular, malunions (post traumatic deformities). 3D-modeling in the preoperative planing gives an opportunity to assess both deformity itself and joint status. Visua­lization of injured segment with three-dimensional model manufactured using 3D-print in actual size (1:1 scale) provides additional capacities. Objective. To analyze the capacity provided by the usage of three-dimensional models of damaged segments in scale 1:1 while the planning of corrective surgery. Methods. Practicability of the usage of 3D-models, that was  worked out on the base of CT-scanning, was studied in the treatment of 52 patients with different post traumatic extraarticular deformities of femur and tibia, after the fractures with intraarticular extension. Clinical results were evaluated using SF-36 and AOFAS scales. Results. Calculation for 3D-modeling was performed mostly virtually using standard computer programs with 3D-reconstruction, but 3D-print technology was used for 5 patients with the most severe and sophisticated deformities of the lower extremities. Changes in functional outcomes, according to SF-36 and AOFAS, for the patients undergone opera- tive treatment, were positive at 12 month of follow-up. Fore­ign colleagues expose analogous results of the investigations and suggest that the modeling with 3D-print provides mostly more safe, reliable and standardized clinical decisions for every particular patient. Conclusions. Preoperative usage of 3D-print on the stage of preoperative planing allows the surgeons to simulate different stages of operative intervention on the physical model, thus, help him to realize possible technical problems, choose adequate fixation device and proper instrumentation. It facilitates the shortening of surgery time, elimination of possible complications rate and achievement, in sum, good functional results in the treatment of this kind of patients.

scholarly journals THE DEVELOPMENT OF A THREE-DIMENSIONAL MODEL OF WWER-1000 CORE USING THE MONTE CARLO SERPENT CODE FOR NEUTRON-PHYSICAL MODELING

2019 ◽  
pp. 58-61
Author(s):  
V.I. Gulik ◽  
O.R. Trofymenko ◽  
V.V. Galchenko ◽  
D.V. Budik
Keyword(s):  
Monte Carlo ◽  
3D Modeling ◽  
Physical Modeling ◽  
Three Dimensional ◽  
Reactor Core ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Fuel Assemblies

The article presents the use of the new Monte Carlo Serpent code for 3D modeling of the WWER-1000 reactor core. Core models for the first loading of RNPP4 and the 28th loading of SUNPP3, the fuel assemblies’ models of different manufacturers were developed and presented. Considerable attention was paid to the detailed modeling of the upper, lower and side reflectors. Validation calculations of the Monte Carlo Serpent code for the WWER-1000 reactor were performed on the basis of the first RNPP4 loading. For the 28th loading of SUNPP3, albedo coefficients for radial and axial reflectors were obtained.

scholarly journals 3D MODELING FOR UNDERWATER ARCHAEOLOGICAL DOCUMENTATION: METRIC VERIFICATIONS

2015 ◽  
Vol XL-5/W5 ◽  
pp. 73-77
Author(s):  
S. D’Amelio ◽  
V. Maggio ◽  
B. Villa
Keyword(s):  
Cultural Heritage ◽  
3D Modeling ◽  
Video Sequence ◽  
Reference Model ◽  
Comparative Method ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Underwater Environment

The survey in underwater environment has always presented considerable difficulties both operative and technical and this has sometimes made it difficult to use the techniques of survey commonly used for the documentation of Cultural Heritage in dry environment. The work of study concerns the evaluation in terms of capability and accuracy of the Autodesk123DCatch software for the reconstruction of a three-dimensional model of an object in underwater context. The subjects of the study are models generated from sets of photographs and sets of frames extracted from video sequence. The study is based on comparative method, using a reference model, obtained with laser scanner technique.

scholarly journals RESULTS OF SURGICAL TREATMENT OF PATIENTS WITH BENIGN TUMORS OF THE SPINE

2005 ◽  
pp. 061-065
Author(s):  
Dmitry Aleksandrovich Ptashnikov ◽  
Vladimir Dmitryevich Usikov
Keyword(s):  
Surgical Treatment ◽  
Tumor Recurrence ◽  
Plastic Material ◽  
Ct Scanning ◽  
Functional Results ◽  
Punch Biopsy ◽  
Benign Tumors ◽  
Tumor Type ◽  
Primary Tumors ◽  
Technical Problems

Objective. To validate the approach to treatment of patients with primary tumors of the spine. Material and Methods. The experience of surgical treatment of 47 patients with benign tumors of the spine was analyzed. The treatment approach was defined with the account of tumor type and localization, and of patient’s somatic status. The diseased area was examined with the help of X-ray, CT scanning, and MRI, and a punch biopsy in some patients. Results. The tumor recurrence was registered in 6 (14.6 %) patients. This shows that in some cases the exact margins of the tumor were not defined despite the comprehensive diagnostic possibilities. Functional results of the treatment implied the restoration of the spine support ability and the pain regress in all observations. Bone plasty was the method of choice for interbody defect replacement. Conclusion. The radical surgery (corpectomy and spondylectomy) considerably reduces the risk of tumor recurrence. Lumbosacral location of the tumor with paravertebral extension presents serious technical problems in its total removal. Autogenic cortical cancellous bone proved to be a good plastic material for defect replacement after vertebra resection and fusion.

scholarly journals 3-D simulation using for hydraulic calculation of the heat Accumulator

2018 ◽  
Vol 240 ◽  
pp. 05011
Author(s):  
Olha Kletska ◽  
Anatoliy Falendysh ◽  
Arthur Kagramanjan ◽  
Andrey Onishchenko
Keyword(s):  
3D Modeling ◽  
Pressure Difference ◽  
Static Pressure ◽  
Three Dimensional ◽  
Hydraulic Calculation ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Software Environment ◽  
Heat Accumulator ◽  
The Given

The article is devoted to the peculiarities of hydraulic calculation of the heat accumulator in the software environment for 3D modeling - SolidWorks. Based on the results of the calculation, the values of the distribution of the velocities of the water flow and the distribution of the static pressure in the given plane of the heat accumulator were obtained, which eventually made it possible to identify the problem areas in the three-dimensional model and obtain the values of the pressure difference.

Use of an interlocking nail-hybrid fixator construct for distal femoral deformity correction in three dogs

2011 ◽  
Vol 24 (03) ◽  
pp. 236-245 ◽  
Author(s):  
K. M. Wendelburg ◽  
C. W. Sereda ◽  
D. J. Reese ◽  
J. L. Wheeler ◽  
D. D. Lewis
Keyword(s):  
Three Dimensional ◽  
Deformity Correction ◽  
Functional Results ◽  
Three Dimensional Model ◽  
Interlocking Nail ◽  
Hybrid External Fixator ◽  
Femoral Deformity ◽  
Locking Nail ◽  
Centre Of Rotation ◽  
Hybrid Fixator

SummaryOur purpose was to report the use of an inter-locking nail-hybrid external fixator construct to correct distal femoral deformities in three dogs. Radiographs, computed tomography and a three-dimensional model were used to plan the surgical procedure. A femoral osteotomy or ostectomy was performed at the level of the centre of rotation of angulation in all three dogs. Angular and rotational deformities were corrected acutely. Distraction osteo-genesis was performed to lengthen each femur postoperatively. All three dogs had additional anatomic abnormalities of the affected hindlimb complicating the correction of the distal femoral deformity. While the interlocking nail-hybrid fixator construct allowed for stable distraction of the femur, all three dogs developed complications during the postoperative convalescent period, and each had some degree of residual lameness. Lengthening the femur following acute deformity correction is problematic and additional experimental and clinical studies are warranted to decrease postoperative morbidity and improve functional results.

Kinematics Simulation Analysis of a Kind of Pedal Rehabilitation Robot

2014 ◽  
Vol 602-605 ◽  
pp. 848-852
Author(s):  
Wen Long Wang ◽  
Ji Rong Wang
Keyword(s):  
Lower Limb ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Lower Limbs ◽  
Rehabilitation Robot ◽  
Movement Trajectory ◽  
Three Dimensional Model ◽  
Kinematics Simulation ◽  
Limb Rehabilitation ◽  
Lower Limb Rehabilitation

This paper describes the design of the gait mechanism of pedal lower limb rehabilitation robot based on people’s heel movement trajectory curve in the normal walking. It is established the kinematics mathematical model of a pedal lower limbs rehabilitation robot and the simplified three-dimensional model with Pro/e software, then it is simulated kinematics using ADAMS software. The simulation result is shown that this pedal lower limbs rehabilitation robot can achieve the expected rehabilitation exercise and run smoothly. Kinematics analysis and simulation of pedal rehabilitation robot is provided the necessary theoretical basis and parameters for the study of lower limb rehabilitation machinery.

scholarly journals Analysis of the dependence of the stressed state of the tracked track of a career excavator from an angle slope

2020 ◽  
Vol 177 ◽  
pp. 03015
Author(s):  
Maxim Rakhutin ◽  
Navarrete Simba ◽  
Sergey Khoroshavin
Keyword(s):  
Stressed State ◽  
3D Modeling ◽  
Equivalent Stress ◽  
Slope Angle ◽  
Three Dimensional ◽  
Stress And Strain ◽  
Direct Proportion ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Caterpillar Track

Conducted static research and determined the strength characteristics of the loaded three-dimensional model of the caterpillar track when working at different slope angles. The parameters were calculated in the 3D modeling system “SolidWorks”. As a result of research, it was found that with an increase in the slope angle, the values of the static equivalent stress and strain in the caterpillar track increase in direct proportion, while the value of the safety factor decreases accordingly.

scholarly journals CONTRACTION OF THE TENSOR FASCIAE LATAE MUSCLE OF THE FASCIA OF THE BROAD THIGH AND FLEXION OF THE KNEE JOINT IN THE RUNNERS

2019 ◽  
Vol 72 (3) ◽  
pp. 318-322
Author(s):  
Rafał Słoniak ◽  
Tomasz Tittinger ◽  
Damian Szczepański ◽  
Tadeusz Szymon Gaździk ◽  
Małgorzata Kulesa-Mrowiecka ◽  
...  
Keyword(s):  
Knee Joint ◽  
Lower Limb ◽  
Mixed Type ◽  
Three Dimensional ◽  
Lower Limbs ◽  
Study Group ◽  
Hip Joints ◽  
Exclusion Criteria ◽  
Post Traumatic ◽  
Tensor Fasciae Latae

Introduction: The illustration of the ranges of bending the limb during the outflow allowed to divide the study group into two parts. In the majority of respondents, the initial flexion prevailed over the final one. The researchers focused on finding the reasons for the advantage of the final bend over the initial one in 30% of the subjects. The aim: The analysis of the dynamic stride under the control of the MVN Biomech system in the bending of the knee joint of the lateral limb, comparing the preparation to the leg (initial bending) and its ending (final) Materials and Methods: 18 right-handed 25 to 35 year old runners were selected after the following exclusion criteria were applied: polyarticular hypermobility, systemic diseases, Rheumatoid arthritis, osteoarthritis, post-traumatic instability. The MVN Biomech system assessed the three-dimensional movements of the joints of the free part of the lower limb and pelvis, and the flexibility of the muscles was subject to physiotherapeutic assessment. Results: In 55% of respondents dominated the pattern in which the initial flexion exceeded by min. 10⁰ final bend in both limbs (decreasing type). The researchers focused on finding the reasons for the smaller difference or the advantage of the final bending on both sides in 30% of respondents (mixed type). The comparison of physiotherapeutic examination results and measurements of MVN Biomech showed functional contractures of the tensor fasciae latea muscles in 5 subjects with a mixed type (83% of subjects with a mixed type). Conclusions: Contraction of the tensor fasciae latae constrained the initial flexion of the knee joint of the lateral limb, and also increased bilateral visitation of the hip joints during the dynamic mixed-type twitch. The remaining muscles of the lower limbs show no statistically significant differences in elasticity compared to the type of the leg.

Three-dimensional model of an ancient Egyptian falcon mummy skeleton

2015 ◽  
Vol 21 (4) ◽  
pp. 368-372 ◽  
Author(s):  
Anton Du Plessis ◽  
Ruhan Slabbert ◽  
Liani Colette Swanepoel ◽  
Johan Els ◽  
Gerrie J Booysen ◽  
...  
Keyword(s):  
Computed Tomography ◽  
3D Printing ◽  
Three Dimensional ◽  
Micro Computed Tomography ◽  
Three Dimensional Model ◽  
Content Type ◽  
3D Print ◽  
Ancient Egyptian ◽  
Computed Tomography Scanning ◽  
Tomography Scanning

Purpose – The purpose of this paper is to present the first detailed three-dimensional (3D) print from micro-computed tomography data of the skeleton of an ancient Egyptian falcon mummy. Design/methodology/approach – Radiographic analysis of an ancient Egyptian falcon mummy housed at Iziko Museums of South Africa was performed using non-destructive x-ray micro-computed tomography. A 1:1 physical replica of its skeleton was printed in a polymer material (polyamide) using 3D printing technology. Findings – The combination of high-resolution computed tomography scanning and rapid prototyping allowed us to create an accurate 1:1 model of a biological object hidden by wrappings. This model can be used to study skeletal features and morphology and also enhance exhibitions hosted within the museum. Originality/value – This is the first replica of its kind made of an ancient Egyptian falcon mummy skeleton. The combination of computed tomography scanning and 3D printing has the potential to facilitate scientific research and stimulate public interest in Egyptology.

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