نتایج جستجو برای: cephalometry

تعداد نتایج: 464  

2015
Claudia Lindner Tim F. Cootes

Cephalometric analysis is commonly used as a standard tool for orthodontic diagnosis and treatment planning. The identification of cephalometric landmarks on images of the skull allows the quantification and classification of anatomical abnormalities. In clinical practice, the landmarks are placed manually which is time-consuming and subjective. This work investigates the application of Random ...

2004
S. Aouda Maxime Berar Barbara Romaniuk Michel Desvignes

In this paper, we present an algorithm for aligning and matching unlabeled sets of points and a method for building a statistical model composed of a mean observation and associated variability. This model is used to solve the cephalometric problem. The main idea of this paper consists in using a dual step strategy: estimate the pose and then the correspondence alternatively. Correspondence bei...

Journal: :journal of dentistry, tehran university of medical sciences 0
hr fattahi associate professor, shiraz orthodontic research center, orthodontic department, shiraz university of medical sciences, shiraz, iran. s torkan hr pakshir l darabi

the aim of this study was to investigate the reproducibility of natural head position (nhp) at different times of the day and to compare the reproducibility of the initial photographs with 6-month repeat photographs.the participants in this prospective study were seventy 14 to 50-year-old individuals. each participant was photographed with a digital camera twice, at three different times of the...

Journal: :acta medica iranica 0
mohammad sadegh ahmad akhoundi department of orthodontics, dental research center, tehran university of medical sciences, tehran, iran. javad chalipa department of orthodontics, school of dentistry, tehran university of medical sciences, tehran, iran. reza hashemi dental research center, tehran university of medical sciences, tehran, iran. tahereh hosseinzadeh nik department of orthodontics, dental research center, tehran university of medical sciences, tehran, iran. ahmad sodagar department of orthodontics, dental research center, tehran university of medical sciences, tehran, iran. rose afzalifar dental research center, tehran university of medical sciences, tehran, iran.

templates are very useful tools for diagnosis of malocclusions. a number of templates have been provided for some populations in previous years. since craniofacial characteristics of different ethnic groups are not the same, each population needs its own norms. the aim of this study was to provide orthodontic craniofacial templates for 8-16 year old iranian boys and compare dentoskeletal featur...

2004
B. Romaniuk M. Desvignes

In this paper, a regional minimal cost approach without parameters is used for contour tracking with a good robustness. Dynamic programming is exploited for its efficiency. This general method is applied to the extraction of the cranial contour on higth resolution X-Ray image. Ellipse is then fitted on the extracted contour to represent it as a first step for automatic localisation of cephalome...

2014
Golnaz Ayazi Furouzan Ebrahimi Niloofar Azami

Cephalometric lateral radiography is an important paraclinical tool in diagnosing and treatment design of skeletaldental malocclusions. Objective of this study is to determine accuracy amount of measurements of cephalometry in two types of digital and ordinary graphy to specify the more beneficial method having more accuracy. In this descriptive-analytical study samples include digital and ordi...

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