نتایج جستجو برای: cone beam computed tomography دندانی

تعداد نتایج: 399860  

Journal: :Physics in medicine and biology 1994
G L Zeng R Clack G T Gullberg

Tuy's cone-beam inversion formula was modified to develop a cone-beam reconstruction algorithm. The algorithm was implemented for a cone-beam vertex orbit consisting of a circle and two orthogonal lines. This orbit geometry satisfies the cone-beam data sufficiency condition and is easy to implement on commercial single photon emission computed tomography (PECT) systems. The algorithm, which con...

AR Ghassemi, AR Talaipour, M Amiri siavoshani, P Olyaee, S Mehralizadeh,

Background and Aim: Bone density is of great assistance in the selection of the proper implant site. The present study aimed to assess the correlation between tissue densities in computed tomography (CT) and three different cone-beam computed tomography (CBCT) units. Materials and Methods: In this descriptive study, a radiographic phantom consisting of a transparent polymethyl methacrylate (PM...

2011
Sharad Pawar

Conventional radiographs used for the management of endodontic problems yield limited information because of the two-dimensional nature of images produced, geometric distortion and anatomical noise. This newer review paper seeks to clarify three-dimensional imaging techniques that have been suggested as adjuncts to conventional radiographs. These include tuned aperture computed tomography, magn...

Journal: :iranian endodontic journal 0
narges farhad molashahi mahdi sohrabi leila farhad molashahi mojdeh mehdizadeh

introduction: an overlooked but important part of successful root canal treatment is a straight-line access (sla). the purpose of this in vitro study was to compare the efficacy of introfile and prerace rotary instruments with gates glidden (gg) drills in gaining sla by cone-beam computed tomography (cbct). methods and materials: a total of forty five extracted mandibular first molars were sele...

Journal: :South African Dental Journal 2022

Two female patients presented with multiple radiolucent lesions noted on panoramic radiography. Cone-beam computed tomography (CBCT) scans confirmed “punched-out” affecting the skull.

Journal: :dental research journal 0
mandana naseri payam paymanpour ali kangarloo sahar haddadpur omid dianat mohammad ali ketabi

background: the aim of this study was to evaluate apical transportation and centering ability of single-fi le instruments, waveone primary, with full rotation versus reciprocation movement using cone-beam computed tomography (cbct) analysis in curved mesiobuccal (mb) root canal of human mandibular molars. materials and methods: thirty mb canals of mandibular molars were randomly divided into tw...

Journal: :dental research journal 0
ehsan hekmatian nasim jafari-pozve ladan khorrami

background: cone-beam computed tomography (cbct) is a new imaging technology that has been widely used in implantology, oral and maxillofacial surgery and orthodontics. this method provides 3-d images that are composed of voxel, which is the smallest image unit, and determines image resolution. smaller voxel is associated with the higher resolution and also greater radiation exposure. this stud...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بوعلی سینا - دانشکده مهندسی 1390

رادیوگرافی دندان با تشخیص و درمان بیماری های دندان به طور انکار ناپذیری تلفیق شده است، حتی به جرات می توان گفت انجام درمان مطلوب ریشه بدون داشتن رادیوگرافی مناسب ممکن نیست. پیشرفت تکنیک های رادیوگرافی مانند ابداع روش های موازی و نسلهای مختلف computed tomography (ct) باعث ارتقای کیفیت درمان ریشه دندان شده است. روش های معمول رادیوگرافی به دلایل مختلف از جمله ماهیت دو بعدی بودن آن، در بسیاری از مو...

Amin Rahpeyma, Parvin Amini, Saeedeh Khajehahmadi

Introduction: Knowledge of the presence of the alveolar antral artery in the lateral maxillary sinus wall is essential for surgeons who operate in this region. The purpose of this study was to investigate the correlation between alveolar antral artery diameter and lateral maxillary bony wall thickness in dentate patients.   Materials and Methods: Thirty five Cone-Beam Computed Tomography (CBCT)...

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