scholarly journals Symptomatic malunion after midshaft clavicle fracture in an adolescent patient: a case report of surgical deformity correction using a 3D printed model

2020 ◽  
Vol 102 (6) ◽  
pp. e126-e129
Author(s):  
P Consigliere ◽  
J Tyler ◽  
D Tennent ◽  
E Pearse
Keyword(s):  
Full Range ◽  
Clavicle Fracture ◽  
Corrective Osteotomy ◽  
Three Dimensional ◽  
Deformity Correction ◽  
Shoulder Function ◽  
Mirror Image ◽  
Range Of Movement ◽  
Limb Deformity ◽  
Three Dimensional Models

A 14-year-old boy underwent surgery for symptomatic malunion of the clavicle. This complication, which is uncommon in adults and adolescents, occurred after a displaced midshaft clavicle fracture that had been treated conservatively. Surgery may be considered if functional impairment, pain, weakness, fatigability and neurological symptoms persist in the presence of significant clavicular deformity. Our case was unusual because the patient had a symptomatic malunion and lost range of movement of his shoulder despite a minor degree of clavicular shortening. We adopted an approach used in lower limb deformity correction but not described for the clavicle in which corrective osteotomy was planned and practised using a three-dimensional printed model of the malunited clavicle. A three-dimensional printed model of the mirror image of the opposite clavicle served as a template of normal. Three-dimensional models were printed from the computed tomography data. The patient’s symptoms resolved and he recovered full range of movement and shoulder function following the corrective osteotomy.

scholarly journals Computer-Assisted Planning and Three-Dimensional-Printed Patient-Specific Instrumental Guide for Corrective Osteotomy in Post-Traumatic Femur Deformity: A Case Report and Literature Review

2018 ◽  
Vol 24 (1) ◽  
pp. 12-17 ◽  
Author(s):  
Lau Chi-Kay ◽  
Chui King-him ◽  
Lee Kin-bong ◽  
Li Wilson
Keyword(s):  
Lower Limb ◽  
New Technologies ◽  
Preoperative Planning ◽  
Corrective Osteotomy ◽  
Three Dimensional ◽  
Patient Specific ◽  
Computer Assisted ◽  
Limb Deformity ◽  
Satisfactory Outcome ◽  
Post Traumatic

Post-traumatic limb deformity is often multiplanar and thus is a difficult pathology to deal with surgically. Precise preoperative planning and accurate intraoperative execution are two main important steps that lead to satisfactory outcome. Computer-assisted planning and three-dimensional-printed patient-specific instrumental guides provide excellent aid to the two steps, respectively. We report a case of posttraumatic lower limb deformity in a patient who underwent closing wedge corrective osteotomy with the aid of the aforementioned new technologies.

Unifying model of carpal mechanics based on computationally derived isometric constraints and rules-based motion – the stable central column theory

2013 ◽  
Vol 39 (4) ◽  
pp. 353-363 ◽  
Author(s):  
M. J. Sandow ◽  
T. J. Fisher ◽  
C. Q. Howard ◽  
S. Papas
Keyword(s):  
Kinetic Theory ◽  
Three Dimensional ◽  
Normal Subjects ◽  
Range Of Movement ◽  
Lateral Column ◽  
Central Column ◽  
Three Dimensional Models ◽  
Carpal Mechanics ◽  
Forward Kinematic ◽  
Four Bar Linkage

This study was part of a larger project to develop a (kinetic) theory of carpal motion based on computationally derived isometric constraints. Three-dimensional models were created from computed tomography scans of the wrists of ten normal subjects and carpal spatial relationships at physiological motion extremes were assessed. Specific points on the surface of the various carpal bones and the radius that remained isometric through range of movement were identified. Analysis of the isometric constraints and intercarpal motion suggests that the carpus functions as a stable central column (lunate–capitate–hamate–trapezoid–trapezium) with a supporting lateral column (scaphoid), which behaves as a ‘two gear four bar linkage’. The triquetrum functions as an ulnar translation restraint, as well as controlling lunate flexion. The ‘trapezoid’-shaped trapezoid places the trapezium anterior to the transverse plane of the radius and ulna, and thus rotates the principal axis of the central column to correspond to that used in the ‘dart thrower’s motion’. This study presents a forward kinematic analysis of the carpus that provides the basis for the development of a unifying kinetic theory of wrist motion based on isometric constraints and rules-based motion.

Research on Scene Simulation of Buoy Launched Device System

2013 ◽  
Vol 433-435 ◽  
pp. 1921-1925
Author(s):  
Guang Pan ◽  
Jing Wei
Keyword(s):  
Full Range ◽  
Three Dimensional ◽  
Viewing Angle ◽  
The Status ◽  
Combined Simulation ◽  
Multigen Creator ◽  
Three Dimensional Models ◽  
The Cost ◽  
Very High ◽  
Relevant Person

For the buoy being launched in the sea, the cost of great number of experiments is very high. It is difficult to get an overall understanding of the process. Aiming at the problems, the visualization of the entire process was realized. Based on Multigen Creator, the three-dimensional models of submarine, buoy, airbag and sleeves were built. Combined simulation program in Vega Prime, the trajectory of the buoy was simulated. In the process of simulation, the viewing angle of the target could be switched for full range of observations. The interaction between users and the simulation system made the relevant person to conveniently and intuitively observe and assess the status of buoys being operated.

Distal clavicle fracture malunion associated with scapular dyskinesis treated with 3D preoperative planning

2021 ◽  
Vol 14 (3) ◽  
pp. e240234
Author(s):  
Satoshi Oki ◽  
Ryogo Furuhata ◽  
Yusuke Sakamoto ◽  
Shohei Iwabu
Keyword(s):  
Clavicle Fracture ◽  
Corrective Osteotomy ◽  
Three Dimensional ◽  
Reduced Model ◽  
Wedge Osteotomy ◽  
Scapular Dyskinesis ◽  
Distal Clavicle Fracture ◽  
Surface Data ◽  
3D Printed ◽  
Shoulder Motion

A 44-year-old woman with distal clavicular malunion and scapular dyskinesis, causing limited shoulder elevation, underwent clavicular osteotomy 2 years postinjury. We used three-dimensional (3D) surface data from both injured and intact sides for correction of the distal clavicular shape by closing wedge osteotomy. The plate position and screw directions were decided preoperatively. Surgery was performed with reference to a 3D-printed, reduced model. Range of shoulder motion and scapular dyskinesis improved by 1 year postoperatively. Precise corrective osteotomy for distal clavicular malunion, referencing a 3D-printed, reduced model, improved scapular dyskinesis and range of shoulder motion 2 years postinjury.

Plastic replicas as three-dimensional models of pulps

1975 ◽  
Vol 39 (8) ◽  
pp. 544-546
Author(s):  
HL Wakkerman ◽  
GS The ◽  
AJ Spanauf
Keyword(s):  
Three Dimensional ◽  
Dimensional Models ◽  
Three Dimensional Models

Validation of a Belt Model for Prediction of Hub Forces from a Rolling Tire4

2009 ◽  
Vol 37 (2) ◽  
pp. 62-102 ◽  
Author(s):  
C. Lecomte ◽  
W. R. Graham ◽  
D. J. O’Boy
Keyword(s):  
Internal Pressure ◽  
Equations Of Motion ◽  
Three Dimensional ◽  
Prediction Method ◽  
Analytical Models ◽  
Beam Model ◽  
Impedance Boundary ◽  
Bending Waves ◽  
Tire Rotation ◽  
Three Dimensional Models

Abstract An integrated model is under development which will be able to predict the interior noise due to the vibrations of a rolling tire structurally transmitted to the hub of a vehicle. Here, the tire belt model used as part of this prediction method is first briefly presented and discussed, and it is then compared to other models available in the literature. This component will be linked to the tread blocks through normal and tangential forces and to the sidewalls through impedance boundary conditions. The tire belt is modeled as an orthotropic cylindrical ring of negligible thickness with rotational effects, internal pressure, and prestresses included. The associated equations of motion are derived by a variational approach and are investigated for both unforced and forced motions. The model supports extensional and bending waves, which are believed to be the important features to correctly predict the hub forces in the midfrequency (50–500 Hz) range of interest. The predicted waves and forced responses of a benchmark structure are compared to the predictions of several alternative analytical models: two three dimensional models that can support multiple isotropic layers, one of these models include curvature and the other one is flat; a one-dimensional beam model which does not consider axial variations; and several shell models. Finally, the effects of internal pressure, prestress, curvature, and tire rotation on free waves are discussed.

Lower limb deformity correction with a simple non-surgical technique

2019 ◽  
Vol 70 (4) ◽  
Author(s):  
Marianna Faggiani ◽  
Selena Desayeux ◽  
Giovanni Martino ◽  
Eraclite Petruccelli ◽  
Alessandro Aprato ◽  
...  
Keyword(s):  
Surgical Technique ◽  
Lower Limb ◽  
Deformity Correction ◽  
Limb Deformity

In Silico Identification and Molecular Characterization of Extracellular Cathepsin L Proteases from Giardia duodenalis

2020 ◽  
Vol 17 (4) ◽  
pp. 342-351
Author(s):  
Sergio A. Durán-Pérez ◽  
José G. Rendón-Maldonado ◽  
Lucio de Jesús Hernandez-Diaz ◽  
Annete I. Apodaca-Medina ◽  
Maribel Jiménez-Edeza ◽  
...  
Keyword(s):  
In Silico ◽  
Cathepsin L ◽  
Three Dimensional ◽  
Giardia Duodenalis ◽  
Evolutionary Genetics ◽  
Extracellular Proteins ◽  
In Silico Identification ◽  
Dimensional Models ◽  
Three Dimensional Models

Background: The protozoan Giardia duodenalis, which causes giardiasis, is an intestinal parasite that commonly affects humans, mainly pre-school children. Although there are asymptomatic cases, the main clinical features are chronic and acute diarrhea, nausea, abdominal pain, and malabsorption syndrome. Little is currently known about the virulence of the parasite, but some cases of chronic gastrointestinal alterations post-infection have been reported even when the infection was asymptomatic, suggesting that the cathepsin L proteases of the parasite may be involved in the damage at the level of the gastrointestinal mucosa. Objective: The aim of this study was the in silico identification and characterization of extracellular cathepsin L proteases in the proteome of G. duodenalis. Methods: The NP_001903 sequence of cathepsin L protease from Homo sapienswas searched against the Giardia duodenalisproteome. The subcellular localization of Giardia duodenaliscathepsin L proteases was performed in the DeepLoc-1.0 server. The construction of a phylogenetic tree of the extracellular proteins was carried out using the Molecular Evolutionary Genetics Analysis software (MEGA X). The Robetta server was used for the construction of the three-dimensional models. The search for possible inhibitors of the extracellular cathepsin L proteases of Giardia duodenaliswas performed by entering the three-dimensional structures in the FINDSITEcomb drug discovery tool. Results: Based on the amino acid sequence of cathepsin L from Homo sapiens, 8 protein sequences were identified that have in their modular structure the Pept_C1A domain characteristic of cathepsins and two of these proteins (XP_001704423 and XP_001704424) are located extracellularly. Threedimensional models were designed for both extracellular proteins and several inhibitory ligands with a score greater than 0.9 were identified. In vitrostudies are required to corroborate if these two extracellular proteins play a role in the virulence of Giardia duodenalisand to discover ligands that may be useful as therapeutic targets that interfere in the mechanism of pathogenesis generated by the parasite. Conclusion: In silicoanalysis identified two proteins in the Giardia duodenalisprotein repertoire whose characteristics allowed them to be classified as cathepsin L proteases, which may be secreted into the extracellular medium to act as virulence factors. Three-dimensional models of both proteins allowed the identification of inhibitory ligands with a high score. The results suggest that administration of those compounds might be used to block the endopeptidase activity of the extracellular cathepsin L proteases, interfering with the mechanisms of pathogenesis of the protozoan parasite Giardia duodenalis.

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