نتایج جستجو برای: mta سفید

تعداد نتایج: 10376  

2017
Bin-Na Lee Soo-Ji Chun Hoon-Sang Chang Yun-Chan Hwang In-Nam Hwang Won-Mann Oh

OBJECTIVES Methylcellulose (MC) is a chemical compound derived from cellulose. MTA mixed with MC reduces setting time and increases plasticity. This study assessed the influence of MC as an anti-washout ingredient and CaCl2 as a setting time accelerator on the physical and biological properties of MTA. MATERIAL AND METHODS Test materials were divided into 3 groups; Group 1(control): distilled...

Journal: :Journal of applied biomaterials & biomechanics : JABB 2009
Lorenzo Comin-Chiaramonti Giacomo Cavalleri Orfeo Sbaizero Piero Comin-Chiaramonti

PURPOSE The aims of this study were to compare the crystal chemical properties of some commercial mineral trioxide aggregate (MTA) and Portland cements (PC) and to propose a new white MTA product. METHODS The samples (four MTA and two PC types) were analyzed by 1) optical microscopy; 2) laser granulometry; 3) X-ray diffraction and fluorescence; 4) scanning electron microscopy (SEM) and electr...

Journal: :Brazilian dental journal 2012
Carlos Estrela Manoel Damião Sousa-Neto Orlando Aguirre Guedes Ana Helena Gonçalves Alencar Marco Antonio Hungaro Duarte Jesus Djalma Pécora

Root perforation represents an undesirable complication that may lead to an unfavorable prognosis. The aims of this study were to characterize and to compare the presence of calcium oxide (CaO) on the chemical composition of materials used for root perforation therapy: gray and white mineral trioxide aggregate (MTA) and Portland cement (PC), gray MTA+5%CaO and gray MTA+10%CaO. The last two mate...

2006
Masaru Kubota E. Olavi Kajander Dennis A. Carson

The control of polyamine synthesis in neoplastia cells is com plex and incompletely understood. Using murine lymphoma cells deficient in methylthioadenosine (MTA) phosphorylase, we have analyzed the role of MTA in the regulation of ornithine decarboxylase and S-adenosylmethionine (SAM) decarboxylase, the two rate-limiting enzymes in the polyamine-biosynthetic pathway. The addition of MTA to the...

Journal: :Brazilian dental journal 2007
Marília Gerhardt de Oliveira Cristina Braga Xavier Flávio Fernando Demarco Antônio Luis Barbosa Pinheiro Aline Tempel Costa Daniel Humberto Pozza

Portland cement has been analyzed and compared to mineral trioxide aggregate (MTA) because of their chemical similarity. The possibility of using this material as a less expensive alternative to MTA in dental practice should be considered. In view of this, the present study compared the components of a Portland cement (Votoran) to two commercial brands of MTA (Pro-Root and MTA-Angelus). Twelve ...

Journal: :Journal of endodontics 2004
Douglas M Ferris J Craig Baumgartner

The purpose of this study was to evaluate the ability of two types of mineral trioxide aggregate (MTA) to seal furcal perforations in extracted human molars using an anaerobic bacterial leakage model. Forty, human, maxillary and mandibular molars were randomly divided into two experimental groups of 18, with two teeth used as positive controls and two teeth without perforations used as negative...

2014
Peter A. Keyel Matthew Romero Wenbo Wu Daniel H. Kwak Qin Zhu Xinyu Liu Russell D. Salter

Regulation of inflammation is necessary to balance sufficient pathogen clearance with excessive tissue damage. Central to regulating inflammation is the switch from a pro-inflammatory pathway to an anti-inflammatory pathway. Macrophages are well-positioned to initiate this switch, and as such are the target of multiple therapeutics. One such potential therapeutic is methylthioadenosine (MTA), w...

Journal: :International endodontic journal 2018
M Parirokh M Torabinejad P M H Dummer

Mineral trioxide aggregate (MTA) is a bioactive endodontic cement (BEC) mainly comprised of calcium and silicate elements. The cement was introduced by Torabinejad in the 1990s and has been approved by the Food and Drug Administration to be used in the United States in 1997. A number of new BECs have also been introduced to the market, including BioAggregate, Biodentine, BioRoot RCS, calcium-en...

2014
Kenan CANTEKİN Serap AVCİ

OBJECTIVES Tricalcium silicate is the major constituent phase in mineral trioxide aggregate (MTA). It is thus postulated that pure tricalcium silicate can replace the Portland cement component of MTA. The aim of this study was to evaluate bond strength of methacrylate-based (MB) composites, silorane-based (SB) composites, and glass ionomer cement (GIC) to Biodentine® and mineral trioxide aggreg...

Journal: :International endodontic journal 2012
A Nosrat M H Nekoofar B Bolhari P M H Dummer

AIM Mineral trioxide aggregate (MTA) is the material of choice for apical barrier techniques during root canal treatment of teeth with open apices. However, the precise control of MTA during the placement of an apical plug is challenging. This article describes the outcomes of unintentional extrusion of MTA into the periradicular tissue during apical barrier treatment in three cases. SUMMARY ...

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