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A New Interactive 3-D Numerical Model of the Human Mandible for Peri-Implant Analysis in-Vivo Compared With Cone Beam Computed Tomography 3-D Quality

R. Moustafa, Tamer M. Nassef, M. Alkhodary, Mona K. Marei, Magdy A. Awadalla
2012 American Journal of Biomedical Engineering  
The fear of failure due to mechanical overloading increased the need for stress-strain analysis along bone-implant interface of the ever growing designs of dental implants.  ...  In this study an interactive 3-D model was retrieved from Computed Tomography (CT) images utilizing, a proposed software are used to obtain high image quality of the jaw bones scanned by 3-D CT compared  ...  (c) right side, (d) right side of the mandible in cross section, (e) left side of the mandible in cross section, (f) anterior segment of the mandible, (g) posterior view of the mandible showing outer and  ... 
doi:10.5923/j.ajbe.20120201.02 fatcat:nshdndxfkzbtfne3iqyxltfizq

Towards a Complete Computer Dental Treatment System

Ahmed El-Bialy
2008 2008 Cairo International Biomedical Engineering Conference  
The theme also includes the detection of defective skeletal and dental areas by applying the appropriate diagnostic procedures.  ...  Acquisition of the 3D virtual model of the patient is the foundation of this work.  ...  Cephalometric analysis is the process of extracting a set of Landmarks and performs certain analysis (computing angles and distances) from the X-ray images.  ... 
doi:10.1109/cibec.2008.4786057 fatcat:ilgzmeewhzgw7fztbkkwazuy24

Comparison of measurements of mandible growth using cone beam computed tomography and its synthesized cephalograms

Hsien-Shu Lin, Jia-Da Li, Yunn-Jy Chen, Cheng-Chung Lin, Tung-Wu Lu, Mu-Hsiung Chen
2014 BioMedical Engineering OnLine  
Methods: Mandibles of six miniature pigs were scanned monthly using CBCT over 12 months and the data were used to reconstruct the 3D bone models.  ...  The current study aimed to compare the measurements of the mandible morphology using 3D cone beam computed tomography (CBCT) images with those using 2D CBCT-synthesized cephalograms; to quantify errors  ...  Given the parameters describing the perspective projection of a cephalogram system, DRR of the mandible can be generated by casting rays from the X-ray source through the volume of the CT data of the mandible  ... 
doi:10.1186/1475-925x-13-133 pmid:25208578 pmcid:PMC4177704 fatcat:wyysch6esrgjbhk3zr7uthywlq

Volumetric analysis of total pharyngeal airway space using cone beam computed tomography among adult egyptians

Ahmad El Rawdy, Walaa Elgemeeay
2018 Egyptian dental journal  
Methods: The present retrospective study was led on 80 cone beam computed tomography (CBCT) records of adult egyptians ranging in age from 20-40 years.  ...  The objective of the research was to; analyse and contrast the pharyngeal airway volume in the class I and class II facial skeletal patterns using cone beam computed tomography.  ...  (13) Automatic segmentation with manual adjusting (semiautomatic segmentation) of images was performed for evaluation of the total volume of the pharyngeal air passage space since ( ) 2188 Ahmad Mohamad  ... 
doi:10.21608/edj.2018.76783 fatcat:iionyvjc2jdftnaag6ax3j64ji

Oral-3D: Reconstructing the 3D Bone Structure of Oral Cavity from 2D Panoramic X-ray [article]

Weinan Song, Yuan Liang, Jiawei Yang, Kun Wang, Lei He
2021 arXiv   pre-print
Consequently, it is of great interest to reconstruct the 3D structure from a 2D X-ray image, which can greatly explore the application of X-ray imaging in dental surgeries.  ...  However, it provides limited 2D information compared with cone-beam computed tomography (CBCT), another dental imaging method that generates a 3D picture of the oral cavity but with more radiation dose  ...  We first take a picture of the patient's mouth and segment then dental area semi-automatically.  ... 
arXiv:2003.08413v4 fatcat:j2vssezckzebxbrcy222f6soc4

Mandibular Reconstruction with Osteo-cutaneous Free Flaps in a Patient after Extensive Surgery Supported with 3D Printed Models

Pabiszczak Maciej, Jacek Banaszewski
2016 Journal of Integrative Oncology  
Introduction and objective: The aim of the study was to evaluate usefulness of 3-D models utilizing generated incremental techniques from thermoplastic materials in mandibular reconstruction with utilization  ...  In four patients with a mandibular defect a physical 3-D model consisting of the reconstructed and unaffected sites was prepared for a reconstruction protocol.  ...  Images of mandible obtained from the computer tomography were converted to digital 3-D models using the Slicer software (version 4.4.0).  ... 
doi:10.4172/2329-6771.1000177 fatcat:ongphdpc7fggnfnenrif7mhfsm

Accuracy of in vitro mandibular volumetric measurements from CBCT of different voxel sizes with different segmentation threshold settings

Ting Dong, Lunguo Xia, Chenglin Cai, Lingjun Yuan, Niansong Ye, Bing Fang
2019 BMC Oral Health  
To determine the accuracy of volumetric measurements of the mandible in vitro by cone-beam computed tomography (CBCT) and to analyze the influence of voxel sizes and segmentation threshold settings on  ...  Computed tomography values can be calculated as (μ tissue -μ water )*k/μ water , whereμ is the x-ray absorption coefficient of tissue, and k is the constant [10] .  ...  However, there is insufficient research on the influence of voxel size and reconstruction threshold on the accuracy of volumetric measurement of the mandible from CBCT.  ... 
doi:10.1186/s12903-019-0891-5 pmid:31484529 pmcid:PMC6727515 fatcat:boubncdtzngrbddybm6usbrfdq

Convolutional Neural Networks in Orthodontics: a review [article]

Szymon Płotka, Tomasz Włodarczyk, Ryszard Szczerba, Przemysław Rokita, Patrycja Bartkowska, Oskar Komisarek, Artur Matthews-Brzozowski, Tomasz Trzciński
2021 arXiv   pre-print
X-ray images, tooth segmentation on Cone-Beam Computed Tomography (CBCT) images or digital models, and classification of defects on X-Ray panoramic images.  ...  Advances in medical imaging technologies and methods allow CNNs to be used in orthodontics to shorten the planning time of orthodontic treatment, including an automatic search of landmarks on cephalometric  ...  of Technology.  ... 
arXiv:2104.08886v1 fatcat:bn6obvqggva63nldkth65xjoe4

Technical aspects of dental CBCT: state of the art

R Pauwels, K Araki, J H Siewerdsen, S S Thongvigitmanee
2015 Dentomaxillofacial Radiology  
Acknowledgments The authors wish to thank J. Morita (Kyoto, Japan) and Planmeca (Helsinki, Finland) for providing technical information. We are grateful to Ms.  ...  The reconstructed image represents the relative X-ray attenuation (i.e. the reduction of beam intensity owing to X-ray interactions) of the different materials in the object.  ...  An improved reconstruction is possible when the number of projection angles is increased.  ... 
doi:10.1259/dmfr.20140224 pmid:25263643 pmcid:PMC4277439 fatcat:mfklyiirujgc3l4pqh4laobhf4

Use of Advanced Artificial Intelligence in Forensic Medicine, Forensic Anthropology and Clinical Anatomy

Andrej Thurzo, Helena Svobodová Kosnáčová, Veronika Kurilová, Silvester Kosmeľ, Radoslav Beňuš, Norbert Moravanský, Peter Kováč, Kristína Mikuš Kuracinová, Michal Palkovič, Ivan Varga
2021 Healthcare  
Compared to its predecessor, the advantage of CNN is that it automatically detects the important features without any human supervision. 3D CNN is used to extract features in three dimensions where input  ...  is a 3D volume or a sequence of 2D pictures, e.g., slices in a cone-beam computer tomography scan (CBCT).  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/healthcare9111545 pmid:34828590 pmcid:PMC8619074 fatcat:wnexmx27gjfbjlri6tmy5rwkv4

Correction of a severe facial asymmetry with computerized planning and with the use of a rapid prototyped surgical template: a case report/technique article

Laszlo Seres, Endre Varga, Andras Kocsis, Zoltan Rasko, Balazs Bago, Endre Varga, Jozsef Piffko
2014 Head & Face Medicine  
The mandible was rotated into the correct position following virtual bilateral sagittal split osteotomy to visualize the movements of the osteotomised mandibular segments.  ...  Following presurgical orthodontics high-resolution computer tomography scan was performed. The stack images were reformatted into a three-dimensional structure.  ...  Three-dimensional reconstruction images can be easily rotated and viewed from any angle.  ... 
doi:10.1186/1746-160x-10-27 pmid:25014992 pmcid:PMC4121308 fatcat:2d75z7dfa5aubnoljghp37yvti

Accuracy of measurements of mandibular anatomy in cone beam computed tomography images

John B. Ludlow, William Stewart Laster, Meit See, L.'Tanya J. Bailey, H. Garland Hershey
2007 Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontology  
reconstructions (two-dimensional) and direct measurements from axial slices (three-dimensional).  ...  with no significant difference between measurement of actual landmarks or CT images, 10-11 its relatively high x-ray dose and examination costs make medical CT  ...  Acknowledgments This work was supported by NIH grant DE-05215 from the National Institute of Dental Research (to C.P.).  ... 
doi:10.1016/j.tripleo.2006.04.008 pmid:17395068 pmcid:PMC3644804 fatcat:6hpj66fkerbdjf7l25q3tzrl7a

The dynamics of the stomatognathic system from 4D multimodal data [article]

Agnieszka A. Tomaka, Leszek Luchowski, Dariusz Pojda, Michał Tarnawski, Krzysztof Domino
2019 arXiv   pre-print
The stomatognathic system consists of the teeth and the skull bones with the maxilla and the mandible.  ...  The purpose of this chapter is to discuss methods of acquisition, visualization and analysis of the dynamics of a complex biomedical system, illustrated by the human stomatognathic system.  ...  The 3D shape of the skull and mandibular bones and teeth has to be acquired using X-ray based means such as Computerized Tomography or Cone Beam Computed Tomography.  ... 
arXiv:1911.08854v1 fatcat:xs2rqkivmjcwhoiy7fu37lofqa

Neutron Imaging in Cultural Heritage Research at the FRM II Reactor of the Heinz Maier-Leibnitz Center

Burkhard Schillinger, Amélie Beaudet, Anna Fedrigo, Francesco Grazzi, Ottmar Kullmer, Michael Laaß, Malgorzata Makowska, Ingmar Werneburg, Clément Zanolli
2018 Journal of Imaging  
The special contrast for hydrogen and between neighboring elements in the periodic system allows for new applications that are not accessible for X-rays, like organic material in enclosed containers made  ...  Fission neutrons permit the examination of large samples that otherwise show large attenuation for thermal neutrons.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/jimaging4010022 fatcat:zjojamxkqnhzbpu3naaybexex4

3d Imaging and Its Implications in Orthodontics.- A Review

Sunil Chandy Varghese, S Kumar
2015 Biomedical & Pharmacology Journal  
Both biplanar and coplanar stereo systems are examples of triangulation geometry. All the 3D measuring systems must be able to identify the same anatomical structure in all three dimensions.  ...  The NewTom 9000 volume imaging technique uses the principle of Tomo synthesis or cone beamed CT because of the shape of the x ray beam In a single scan, the x ray source and a reciprocating x ray sensor  ...  a cone shaped x ray beam that is large enough to encompass the region of interest.  ... 
doi:10.13005/bpj/693 fatcat:niyprqul75c7pppouaytwjnihy
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