Comparative analysis of bone volume in the anterior region in patients with protrusion and normal tooth inclination based on CBCT

2020 ◽  
Vol 26 (1) ◽  
pp. 21-27
Author(s):  
Igor’ S. Kopetskiy ◽  
Anna B. Slabkovskaya ◽  
Galina S. Kabisova ◽  
Nana G. Meskhiya
Keyword(s):  
Bone Tissue ◽  
3D Model ◽  
Bone Volume ◽  
Cone Beam ◽  
Initial Thickness ◽  
Maxillofacial Region ◽  
Calculation Results ◽  
Tomography Method ◽  
Bone Structures ◽  
Tooth Inclination

The introduction of cone beam computed tomography (CBCT) methods allow to most accurately visualize the bone structures of the maxillofacial region, which enables the specialist to obtain a detailed 3D model of the jaws and teeth with a fairly high resolution. This article provides the use of computed beam tomography method in orthodontic practice to analyze the initial thickness of bone tissue at various levels of the root length of the frontal group of teeth during their retrusion and protrusion. The calculation results allow us to draw conclusions about the volume of bone tissue and the possibility of orthodontic manipulations. The results of the study significantly improve the diagnosis and planning of orthodontic treatment for pathology in the frontal jaw.

scholarly journals Dispersed biocomposite based on wollastonite/hydroxyapatite: Osteoplastic potential in terms of radiology

2020 ◽  
pp. 88-89
Author(s):  
V. I. Apanasevich ◽  
E. K. Papynov ◽  
I. S. Afonin ◽  
I. O. Evdokimov ◽  
O. O. Shichalin ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Tissue Regeneration ◽  
Bone Structure ◽  
Average Density ◽  
Bone Volume ◽  
Bone Tissue Regeneration ◽  
Cone Beam ◽  
Alveolar Ridge ◽  
Experimental Animals ◽  
Lower Jaw

Objective: assessment of the bone tissue regeneration of alveolar ridge during implantation of biocomposite based on wollastonite/hydroxyapatite (HA) in the experiment.Methods: Four female rabbits were performed the extraction of lower left incisors under the general and local anesthesia followed by the augmentation with biocomposite. The results were assessed with cone beam computed tomography.Results: On the first day, the average density of bone structure of the alveolar socket was 37 HU; on the 60th day, it reached 1090 HU. The contour of the alveolar socket was not already visible on the 35th day. There were no signs of the osteolysis.Conclusions: The experiment result confirms the the participation of a CaSiO3/HA biocomposite in bone tissue regeneration, as evidenced by the dynamics of the increase in bone volume in the alveoli of the removed teeth of the lower jaw of experimental animals. 

Kinematics and Dynamics Simulation Research for Roller Coaster Multi-Body System

2011 ◽  
Vol 421 ◽  
pp. 276-280 ◽  
Author(s):  
Ge Ning Xu ◽  
Hu Jun Xin ◽  
Feng Yi Lu ◽  
Ming Liang Yang
Keyword(s):  
Structural Design ◽  
3D Model ◽  
Structure Design ◽  
Dynamics Simulation ◽  
Body System ◽  
Load Spectrum ◽  
Roller Coaster ◽  
Simulation Research ◽  
Calculation Results ◽  
Multi Body

To assess the roller coaster multi-body system security, it is need to extract the running process of kinematics, dynamics, load spectrum and other features, as basis dates of the roller coaster structural design. Based on Solidworks/motion software and in the 3D model, the calculation formula of the carrying car velocity and acceleration is derived, and the five risk points of the roller coaster track section are found by simulation in the running, and the simulation results of roller coaster axle mass center velocity are compared with theoretical calculation results, which error is less than 4.1%, indicating that the calculation and simulation have a good fit and providing the evidence for the roller coaster structure design analysis.

scholarly journals A Diagnosis of Maxillary Sinus Fracture with Cone-Beam CT: Case Report and Literature Review

2014 ◽  
Vol 7 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Selmi Yardimci Yilmaz ◽  
Melda Misirlioglu ◽  
Mehmet Zahit Adisen
Keyword(s):  
Computed Tomography ◽  
Case Report ◽  
Maxillary Sinus ◽  
Cone Beam Ct ◽  
Maxillofacial Surgery ◽  
Maxillofacial Trauma ◽  
Cone Beam ◽  
Maxillofacial Region ◽  
Emergency Center ◽  
Frontal Wall

The purpose of this article is to present the case of maxillofacial trauma patient with maxillary sinus fracture diagnosed with cone-beam computed tomography (CBCT) and to explore the applications of this technique in evaluating the maxillofacial region. A 23-year-old male patient attempted to our clinic who had an injury at midface with complaints of swelling, numbness. The patient was examined before in emergency center but any diagnosis was made about the maxillofacial trauma. The patient re-examined clinically and radiographically. A fracture on the frontal wall of maxillary sinus is determined with the aid of CBCT. The patient consulted with the department of maxillofacial surgery and it is decided that any surgical treatment was not necessary. The emerging technique CBCT would not be the primary choice of imaging maxillofacial trauma. Nevertheless, when advantages considered this imaging procedure could be the modality of choice according to the case.

scholarly journals The Effect of Implant-Induced Artifacts on Interpreting Adjacent Bone Structures on Cone-Beam Computed Tomography Scans

2018 ◽  
Vol 27 (1) ◽  
pp. 10-14 ◽  
Author(s):  
Rachel A. Sheridan ◽  
Yi-Chen Chiang ◽  
Ann M. Decker ◽  
Pimchanok Sutthiboonyapan ◽  
Hsun-Liang Chan ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Computed Tomography Scans ◽  
Bone Structures

Analysis of the lower jaw exoskeleton in finite element programs

2021 ◽  
pp. 88-92
Author(s):  
D. Yu. D’yachenko ◽  
A. A. Vorob’ev ◽  
Iu. A. Makedonova ◽  
О. N. Kurkina ◽  
S. V. D’yachenko ◽  
...  
Keyword(s):  
Finite Element ◽  
External Fixation ◽  
3D Model ◽  
Bone Fractures ◽  
Maxillofacial Region ◽  
Lower Jaw ◽  
Fixation Devices ◽  
Bone Fragments ◽  
External Fixation Device ◽  
Medical University

A special place in the methods of surgical treatment of bone fractures is occupied by transosseous osteosynthesis using external fixation devices of various designs.Objective: to analyze the lower jaw exoskeleton in finite element programs.Materials and research methods. During the research, 36 human lower jaws were involved from the museum of the Department of Oper-ative Surgery and Topographic Anatomy of the Volgograd State Medical University. They were scanned in 3D. All obtained images were loaded into a virtual scene reconstruction program. Fractures of the lower jaws in the corner area were modeled, an apparatus for external fixation of the lower jaw exoskeleton was installed, and the chewing load on the lower jaw was simulated. The place of application of the force was an area on a small fragment of a repositioned 3D model of the mandibular bone corresponding to the place of attachment of the masseter muscle. The evaluation of virtual studies was carried out according to the results of the stress-strain states of the bones and apparatus, the schedule of displacements of objects and the results of the analysis of the safety factor.Research results and discussion. In the course of evaluating the virtual placement of the mini-fixator wires of the apparatus for external fixation of the lower jaw exoskeleton, it was revealed that the main load is applied to the mini-fixator wires on a large fragment and the bone in the area of the wires. For the possibility of precise positioning of the osteofixers of the external fixation device, a device for the safe installation of the spokes of the lower jaw exoskeleton was also developed.Conclusion. Thus, on the basis of computer mathematical analysis, it can be argued that the developed design of the apparatus for external fixation of the lower jaw exoskeleton works under conditions of the maxillofacial region, performs reposition and fixation of bone fragments of the lower jaw under conditions of chewing functioning of the restored fracture of the lower jaw.

Measurement of cortical plate volume based on CBCT of frontal teeth in studies with retrusion and normality

2021 ◽  
pp. 17-21
Author(s):  
N. G. Meskhiya ◽  
I. S. Kopetskiy ◽  
I. A. Nikolskaya ◽  
D. A. Eremin ◽  
O. N. Kovaleva
Keyword(s):  
Orthodontic Treatment ◽  
Soft Tissues ◽  
Three Dimensions ◽  
Cone Beam ◽  
Cortical Plate ◽  
Imaging Method ◽  
New Approach ◽  
Accuracy Of Measurements ◽  
Bone Structures

Cone Beam Computed Tomography (CBCT) is the preferred imaging method for a comprehensive orthodontic examination. Thanks to the development of this technique, clinicians today can make most accurate measurements without fear of errors associated with projection distortion or localization of landmarks on radiographs. The quality of CBCT images gives to orthodontists the ability to analyze bone structures, teeth (even impacted teeth), and soft tissue in three dimensions. The accuracy of measurements of hard and soft tissues from CBCT images determines the accuracy of diagnosis and treatment planning. A fundamentally new approach has been proposed, which makes it possible to thoroughly study the bone tissue surrounding the tooth at the stages of planning orthodontic treatment. Аnalysis of radiation studies of patients with dentoalveolar anomalies was carried out to select the optimal treatment tactics and to control its effectiveness.

Contribution of cone-beam computed tomography in the decision of surgical management for bone lesions of the maxillofacial region

2019 ◽  
Vol 47 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Ananda Amaral Santos ◽  
Fernanda Paula Yamamoto-Silva ◽  
Erica Miranda Torres ◽  
José Valladares-Neto ◽  
Paulo Tadeu Souza Figueiredo ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Surgical Management ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Bone Lesions ◽  
Maxillofacial Region

scholarly journals Accurate Measurement of Surface Areas of Anatomical Structures Including Areas with an Irregular Relief: a Modern Solution to the Problem

2021 ◽  
Vol 9 (4) ◽  
pp. 90-95
Author(s):  
A. A. Воробьев ◽  
Yu. A. Makedonova ◽  
A. O. Solov'ev ◽  
D. Yu. D'yachenko ◽  
E. G. Bagrii ◽  
...  
Keyword(s):  
Surface Area ◽  
3D Model ◽  
Maxillofacial Surgery ◽  
Model Reconstruction ◽  
Maxillofacial Region ◽  
Anatomical Structures ◽  
Anatomical Region ◽  
Surface Areas ◽  
3D Model Reconstruction ◽  
Modern Solution

Relevance. The currently available methods for measuring anatomical areas with irregular relief do not claim to be accurate and easy to use.The aim of the study was to develop a method for measuring the surface area of an anatomical region (substructure) with an irregular relief.Material and methods. There was developed an option to measure the surface area of an anatomical region (substructure) with a complex relief in patients with pathology of the maxillofacial region and perineum using realistic 3D modeling.Results. The principle of the developed method is that, firstly, it is necessary to determine the patient's "zone of interest", where it is planned to measure the surface area; after that, digital photographs of the defined area are taken to obtain a sufficient number of images from the maximum number of available angles using a template with predefined dimensions for scaling. Then the obtained photographs are processed in the program for the 3D model reconstruction, and a realistic 3D model that correctly repeats the relief of the "zone of interest" and guarantees measurements of the surface area taking into account all its individual features is obtained. The method has been tested in obstetrics and gynecology, dentistry, maxillofacial surgery.Conclusion. This technique has been proved to be simple, accessible, fast, highly accurate in measuring the area of anatomical regions with complex relief. At the same time, the investigated object does not need fixation and prolonged immobility. A digital optical device is used contactless, the fact being significant in situations where it is necessary to comply with the rules of asepsis and antisepsis.

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