نتایج جستجو برای: توموگرافی کامپیوتری با پرتوهای مخروطی شکلcone beam computed tomography

تعداد نتایج: 1035319  

2014
Prashant P Jaju Sushma P Jaju

Panoramic radiography and computed tomography were the pillars of maxillofacial diagnosis. With the advent of cone-beam computed tomography, dental practice has seen a paradigm shift. This review article highlights the potential applications of cone-beam computed tomography in the fields of dental implantology and forensic dentistry, and its limitations in maxillofacial diagnosis.

2015
Christian Lohse Philip Catala-Lehnen Marc Regier Max Heiland

Cone beam computed tomography is a state-of-the-art imaging tool, initially developed for dental and maxillofacial application. With its high resolution and low radiation dose, cone beam tomography has been expanding its application fields, for example, to diagnosis of traumata and fractures in the head and neck area. In this study, we demonstrate superior and satisfactory performance of cone b...

مقدمه: هدف این مطالعه بررسی تأثیر مدت‌زمان کشیدن دندان بر زاویه باکولینگوالی استخوان آلوئول در ناحیه خلف مندیبل با استفاده از تصاویر CBCT بود. مواد و روش­ها: تصاویرCBCT مربوط به 56 بیمار دانشکده دندانپزشکی همدان جمع آوری گردید. بی...

حسن عزیزی سینا حقانی فر, فاطمه رضیان, فاطمه شاکری نرجس هوشیاری,

مقدمه: پرمولرهای مندیبل به دلیل تنوع در شکل و تعداد کانال ها از سخت ترین دندان ها برای درمان ریشه هستند. به همین دلیل بیشترین شکست درمان اندو مربوط به این دندان ها است. در این مطالعه تعداد کانال ها ی پرمولر های مندیبل و مورفولوژی آن ها در جمعیت شهر های شمال ایران بررسی شد. مواد و روش ها: در این مطالعه توصیفی </str...

Journal: :iranian journal of radiology 0
solmaz valizadeh department of oral and maxillofacial radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran zahra vasegh department of oral and maxillofacial radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran; department of oral and maxillofacial radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran. tel: +98-2188773550, fax: +98-2188773550 samin rezapanah department of oral and maxillofacial radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran yaser safi department of oral and maxillofacial radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran mohamad javad khaeazifard dental research institute, tehran university of medical sciences, tehran, iran

objectives this study aimed to assess the effect of object position in the field of view (fov) of cbct on detection of vrfs in teeth with intra-canal posts. materials and methods the crowns of 60 extracted premolar teeth were cut at the level of cementoenamel junction (cej). root canals were filled with gutta-percha and filling of the coronal 2/3 of the root canals was subsequently removed to f...

ژورنال: :مجله دانشگاه علوم پزشکی شهید صدوقی یزد 0
فاطمه عزالدینی اردکانی f ezzadini ardekani school of dentistry, shahid sadoughi university of medical sciences, yazdدانشکده دندانپزشکی یزد فهیمه احرار یزدی f ahrar yazdi school of dentistry, shahid sadoughi university of medical sciences, yazdدانشکده دندانپزشکی یزد مجید کاظمی m kazemi university of medical sciences, tehran, iranدانشگاه علوم پزشکی ارتش تهران، تهران، ایران

مقدمه: عفونت های ادنتوژنیک یکی از عوامل شایع سینوزیت ماگزیلاری است. هدف از این مطالعه ارزیابی رابطه بین دندان ها با بیماری پریودنتال و افزایش ضخامت مخاط سینوس ماگزیلاری با استفاده از cbct می باشد. روش بررسی: این مطالعه از نوع گذشته نگر و مقطعی بود. اسکن های cbct97 بیمار(188 سینوس) به منظور ارزیابی وجود بیماری پریودنتال و ضایعات پری اپیکال در دندان های خلفی ماگزیلا و رابطه اش با افزایش ضخامت مخا...

Journal: :journal of dental school, shahid beheshti university of medical sciences 0
s. valizadeh dept. of oral &amp; maxillofacial radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran. n. abazarian y. safi dept. of oral &amp; maxillofacial radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran. z. azizi dept. of oral &amp; maxillofacial radiology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran.

objective: diagnosis of vertical root fractures (vrfs) is critical in endodontics. cone beam computed tomography (cbct)  has significantly enhanced image quality compared to digital radiography (dr) and greatly aids the diagnosis of vrfs but, metal artifacts has remained as a problem in vrf detection.  this study evaluated the effect of intra canal posts on the diagnostic accuracy of cbct and d...

Journal: :iranian endodontic journal 0
zahra sadat madani azam haddadi sina haghanifar ali bijani

introduction: due to the importance of apical transportation during root canal preparation, the aim of the current study was to use cone-beam computed tomography (cbct) to assess the extent of apical transportation caused by protaper and mtwo files. methods and materials: forty extracted maxillary first molars with 19-22 mm length and 20-40 degrees of curvature were selected. the mesiobuccal ca...

Journal: :iranian endodontic journal 0
jamileh ghoddusi maryam forghani assistant professor of endodontics, dental material research center, school of dentistry, mashhad university of medical sciences, mashhad,iran ali bagherpour fatemeh mahmudabadi majid sarmad

introduction : the aim of this in vitro study was to compare the effect of gates-glidden and peeso reamer drills on residual dentin thickness during post space preparation in order to discover which method has minimum root structure damage. materials and methods: thirty extracted human maxillary premolars with bifurcations at root middle were horizontally cut 15 mm coronal to the apical end aft...

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