Large-scale, high-density (up to 512 channels) recording of local circuits in behaving 1 animals 2 3 Antal Berényi 2, , Zoltán Somogyvári , Anett J. Nagy, Lisa Roux, John Long, 4 Shigeyoshi Fujisawa, Eran Stark, Anthony Leonardo, Timothy D. Harris and György 5 Buzsáki 6 7 The Neuroscience Institute New York University, School of Medicine, New York, 8 NY 10016, USA 9 Center for Molecular and Beh...

INTRODUCTION Most current root-end filling materials do not provide a perfect seal. Thus, a microscopic space is likely to exist in the interface between walls of the root-end cavity and filling material, which allows microorganisms and their products to penetrate. In addition to good sealing ability and biocompatibility, root-end filling materials should ideally have some antimicrobial activit...

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...

Background Recently a new generation of endodontic sealers has been developed based on calcium silicate as MTA Fillapex, Endoseal MTA, Total Fill BC Sealer, EndoSequence BC Sealer, iRoot SP, Endo CPM sealer, MTA-Angelus and ProRoot Endo Sealer. A review of literature was conducted to discuss the composition, physicochemical properties, and clinical perspectives of calcium silicate based sealers...

Objective. The aim of this study was to evaluate the physicochemical properties and bioactivity of two formulations of calcium silicate-based cements containing additives (CSCM) or resin (CSCR), associated with radiopacifying agents zirconium oxide (ZrO2) and niobium oxide (Nb2O5) as micro- and nanoparticles; calcium tungstate (CaWO4); and bismuth oxide (Bi2O3). MTA Angelus was used as control....

Background and Aim: The use of ceramics has a long history. A new category of these materials was used in medicine in 1960 introduced as bioceramics. Biocompatibility, osteoinductivity and sealing ability are among the most favorable characteristics of endodontic bioceramics. Introduction of mineral trioxide aggregate (MTA) revolutionized endodontics and this new era is progressively growing. ...

Amaç: Bu in vitro çalışmanın amacı; farklı tamir materyalleri (MTA Angelus, RetroMTA, Biodentin) ile tedavi edilen eksternal servikal kök rezorpsiyonuna sahip dişlerin kırılma dayanımını değerlendirmektir.
 Gereç ve Yöntem: çalışmada tek köklü 75 adet üst çene santral insan dişi kullanıldı. 15 örnek, hiçbir işlem yapılmadan pozitif kontrol grubu olarak ayrıldı. Kalan 60 örnekte simüle rezo...

INTRODUCTION In this in vitro study, the efficacy of 2% carbonic acid and 2% acetic acid on the surface, microhardness of white mineral trioxide aggregate (MTA) and dentin after 1 day of setting and 21 days of setting of MTA is measured. MATERIALS AND METHODS Tooth molds were made using 60 single-rooted premolars by slicing them to 4 mm in the mid-root region. White MTA (Angelus) was mixed an...

This study was designed to investigate the resistance to dislodgment provided by MTA HP, a new high-plasticity calcium silicate-based cement. Biodentine and White MTA Angelus were used as reference materials for comparison. Three discs 1 ± 0.1 mm thick were obtained from the middle third of the roots of 5 maxillary canines. Three 0.8-mm-wide holes were drilled on the axial surface of each root ...