نتایج جستجو برای: سمان mta

تعداد نتایج: 2979  

بانوا, سپیده, رهشناس, نینا, صلاحی هنگامه جو, پناه, ملاجوادی, ودود, مهشید, مینو,

خلاصه: سابقه و هدف: از مهمترین علل شکست در درمان با پست‌های فایبری جدا شدگی در سطح سمان- عاج می‌باشد. هدف از این مطالعه مقایسه، دو نوع سمان رزینی Self adhesive بر استحکام باند برشی پست فایبر با عاج دندان می‌باشد. مواد و روش ها: مطالعه به روش تجربی بر روی 20 دندان پرمولر تک کاناله مندیبل انجام شد که شرایط ورود به مطالعه را داشتند. بعد از انجام درمان ریشه به روش استاندارد،‌ دندان‌ها به طور تصادفی...

ژورنال: مجله دندانپزشکی 2018

Background and Aims: According to many uses of MTA in different treatments, studying about its properties like the setting time, is of great importance. The aim of this study was to compare the initial and final setting time of an Iranian MTA and a foreign MTA. Materials and Methods: Seven samples were in each group; for measurement of initial and final setting time of MTAs, a mold with dime...

Journal: :Journal of dental education 2012
Jale Tanalp Meriç Karapinar-Kazandag Handan Ersev Gündüz Bayirli

The aim of this study was to assess the current status of mineral trioxide aggregate (MTA) as an educational material in dental schools in Turkey. A survey was sent to senior members of the endodontic departments of seventeen dental schools; fourteen responded. All respondents reported that they used MTA in their clinical practice, with apexification, perforations, retrograde fillings, and root...

Journal: :Acta odontologica latinoamericana : AOL 2010
Alvaro H Borges Fábio L M Pedro Carlos E S Miranda Alex Semenoff-Segundo Jesus D Pécora Antônio M Cruz Filho

The purpose of this investigation was to evaluate the physicochemical properties of gray and white structural and nonstructural Portland cement, gray and white ProRoot MTA and MTA BIO. The water/powder ratio, setting time, solubility and pH (hydrogen-ion potential) changes of the materials were evaluated. Tests followed specification #57 from the American National Standard Institute/American De...

Journal: :Journal of neurology, neurosurgery, and psychiatry 2005
W M van der Flier E C W van Straaten F Barkhof J M Ferro L Pantoni A M Basile D Inzitari T Erkinjuntti L O Wahlund E Rostrup R Schmidt F Fazekas P Scheltens

OBJECTIVE To assess the associations of medial temporal lobe atrophy (MTA) and white matter hyperintensities (WMH) with cognitive function in a large group of independently functioning elderly people. METHODS Data were drawn from the multicentre, multinational leukoaraiosis and disability (LADIS) project which is studying prospectively the role of WMH as an independent predictor of the transi...

Journal: :Biomaterials 2004
Yuan-Ling Lee Bor-Shiunn Lee Feng-Huei Lin Ava Yun Lin Wan-Hong Lan Chun-Pin Lin

Utilizing scanning electron microscope, X-ray diffraction (XRD) and microhardness tests, we evaluated how various physiological environments affect the hydration behavior and physical properties of mineral trioxide aggregate (MTA). We found that the microstructure of hydrated MTA consists of cubic and needle-like crystals. The former comprised the principal structure of MTA, whereas the later w...

Journal: :Journal of neurology, neurosurgery, and psychiatry 1992
P Scheltens D Leys F Barkhof D Huglo H C Weinstein P Vermersch M Kuiper M Steinling E C Wolters J Valk

Magnetic resonance imaging (MRI) has shown a great reduction in medial temporal lobe and hippocampal volume of patients with Alzheimer's disease as compared to controls. Quantitative volumetric measurements are not yet available for routine clinical use. We investigated whether visual assessment of medial temporal lobe atrophy (MTA) on plain MRI films could distinguish patients with Alzheimer's...

Journal: :ECS sensors plus 2023

The present work focuses on the synthesis of Fe 3 O 4 magnetite core@shell type nanoparticles modified with three types ligands: Magnetite activated carbon (MAC), silica (tetraethoxysilane, TEOS, and 3-aminopropyltriethoxysilane, APTES) (MTA) silica, APTES humic acids (MTAH). MTAH sample shows greater porosity in comparison to MTA, MAC samples. band gap is 4.08 eV, which higher than MTA (2.92 e...

2016
Kusai Baroudi Samah Samir

There were several materials used to seal different types of perforation defects. MTA is one of these restorative materials that is considered the most effective, biocompatible, non-toxic, and non-irritant; promote bone healing and cementum regeneration. The objective of this article was to review and summarize the sealing ability of MTA compared with the other materials used for sealing differ...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی مشهد - دانشکده دندانپزشکی 1392

مقدمه در سراسر دوره زندگی یک دندان، بافت پالپ وایتال، تولید عاج ثانویه، عاج پری توبولار (اسکلروزیس) و عاج ترمیمی که در پاسخ به یک تحریک بیولوژیک و/ یا پاتولوژیک ایجاد می شود، را به عهده دارد .پالپ کپ یک راه درمانی است که در آن ماده حفاظتی روی پالپ اکسپوز شده قرارداده می شود تا به پالپ جهت حفظ وایتالیتی و فانکشن کمک کند. بنابراین، موفقیت درمان پالپ کپ به حفظ وایتالیتی پالپ و تشکیل سد عاجی وابس...

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