Results 81 to 90 of about 47,465 (321)

مقایسه گیرنده دیجیتال CMOS با فیلم در تشخیص تحلیل خارجی ریشه: مطالعه آزمایشگاهی [PDF]

Journal of Mashhad Dental School, 2011
مقدمه:تحلیلریشهیکیازمعضلاتتشخیصیدردرمان‏هایاندودنتیکمی‏باشد. باتوجهبه این کهموفقیت درمان به تشخیص زودهنگام این پاتولوژی وابسته است، لذا به کارگیری ابزارهای مختلف تشخیصی اعم از تصاویر رادیوگرافی بر پایه فیلم و یا تصاویر دیجیتال و در نهایت تکنیک‏های ...
زهرا دلیلی, مهران طارمسری, سیده طاهره محتوی پور, ایمان اوژند   +3 more
doaj  

Gingival inflammation and leukocyte–endothelium cell interactions in women with polycystic ovary syndrome

Journal of Periodontology, EarlyView.
Abstract Background Given the link between chronic inflammation and periodontal pathologies and increased cardiovascular risk, this study aims to investigate if gingivitis exacerbates the inflammatory response and subclinical atherosclerotic markers in women with polycystic ovary syndrome (PCOS). Methods For this case–control study, women were assigned
Cecilia Fabiana Márquez‐Arrico, Francisco Javier Silvestre, Meylin Fernández‐Reyes, Sandra López‐Domènech, Jonathan Hermenejildo, Zaida Abad‐Jiménez, Javier Silvestre‐Rangil, Pablo Fernández‐Collazo, Carlos Morillas, José María Montiel‐Company, Víctor M. Víctor, Milagros Rocha   +11 more
wiley   +1 more source

The Effects on Absorbed Dose Distribution in Intraoral X-ray Imaging When Using Tube Voltages of 60 and 70 kV for Bitewing Imaging

eJournal of Oral Maxillofacial Research, 2013
Objectives: Efforts are made in radiographic examinations to obtain the best image quality with the lowest possible absorbed dose to the patient. In dental radiography, the absorbed dose to patients is very low, but exposures are relatively frequent.
Kristina Hellén-Halme, Mats Nilsson
doaj   +1 more source

Effect of dose reduction in digital dental panoramic radiography on image quality

Dentomaxillofacial Radiology, 2002
OBJECTIVES To investigate the effect of dose reduction in digital panoramic radiography on subjective image quality and diagnostic performance. METHODS Two digital panoramic radiographs were obtained with the Orthophos DS(Sirona, Bensheim, Germany) of patients (n=100) receiving dental care. The first image was taken at the standard exposure setting.
B Dannewitz, Peter Eickholz, J Mühling, Stefan Hassfeld   +3 more
openaire   +3 more sources

Efficiency of oral keratinized gingiva detection and measurement based on convolutional neural network

Journal of Periodontology, EarlyView.
Abstract Background With recent advances in artificial intelligence, the use of this technology has begun to facilitate comprehensive tissue evaluation and planning of interventions. This study aimed to assess different convolutional neural networks (CNN) in deep learning algorithms to detect keratinized gingiva based on intraoral photos and evaluate ...
Gokce Aykol‐Sahin, Ozgun Yucel, Nihal Eraydin, Gonca Cayir Keles, Umran Unlu, Ulku Baser   +5 more
wiley   +1 more source

An Adaptive Enhancement Based Hybrid CNN Model for Digital Dental X-ray Positions Classification [PDF]

arXiv, 2020
Analysis of dental radiographs is an important part of the diagnostic process in daily clinical practice. Interpretation by an expert includes teeth detection and numbering. In this project, a novel solution based on adaptive histogram equalization and convolution neural network (CNN) is proposed, which automatically performs the task for dental x-rays.
arxiv  

Histological and immunohistochemical soft‐tissue response to cylindrical and concave abutments: Multicenter randomized clinical trial

Journal of Periodontology, EarlyView.
Abstract Background This study aimed to analyze the influence of concave and cylindrical abutments on peri‐implant soft tissue. Dimensions, collagen fiber orientation, and immunohistochemical data were assessed. Methods A multicenter, split‐mouth, double‐blind randomized clinical trial was conducted.
Fabio Camacho‐Alonso, Juan Carlos Bernabeu‐Mira, Joaquín Sánchez, Antonio Julián Buendía, Ana María Mercado‐Díaz, Mario Pérez‐Sayáns, Alba Pérez‐Jardón, José Manuel Somoza Martín, Javier Montero, Cristina Gomez‐Polo, Norberto Quispe‐López, David Peñarrocha‐Oltra   +11 more
wiley   +1 more source

Accuracy of Digital Subtraction Radiography in detection of artificial external root resorption (in vitro)

مجله دانشکده دندانپزشکی اصفهان, 2008
Introduction: External root resorption refers to the loss of cementum and/or dentin from the rootof the teeth. 40% mineral loss occur in conventional radiographies but digital subtractionradiography is capable of localizing a lesion with only 1-5 ...
R Ghafari, M Keshavarzi
doaj  

Emerging basic, clinical and translational research fronts in dental biomaterials R&D [PDF]

arXiv, 2017
The current (2007-2007) structure and content of dental materials research has been investigated by identifying and describing the emergent research fronts which can be related to basic, translational and clinical observation research. By a combination of network analysis and text mining of the literature on dental materials indexed in the Web of ...
arxiv  

TSGCNet: Discriminative Geometric Feature Learning with Two-Stream GraphConvolutional Network for 3D Dental Model Segmentation [PDF]

arXiv, 2020
The ability to segment teeth precisely from digitized 3D dental models is an essential task in computer-aided orthodontic surgical planning. To date, deep learning based methods have been popularly used to handle this task. State-of-the-art methods directly concatenate the raw attributes of 3D inputs, namely coordinates and normal vectors of mesh cells,
arxiv