Track topics on Twitter Track topics that are important to you
Oliveira IR, Pandolfelli VC, Jacobovitz M. Chemical, physical and mechanical properties of a novel calcium aluminate endodontic cement. International Endodontic Journal. Abstract Aim To evaluate the influence of additives on several physical and chemical properties of a novel endodontic cement based on calcium aluminate in comparison with mineral trioxide aggregate (MTA). Methodology Manipulation tests, measurements of temperature, pH, ionic conductivity, compressive strength, apparent porosity, and pore size distribution were carried out on Gray-MTA (Angelus) and calcium aluminate cement (Secar-71, Kerneos) with and without various additives: a polymeric dispersant, CaCl(2) as plasticizer, and ZnO as radiopacifier. Results The calcium aluminate cement without additives had a setting time of approximately 60 min, and when combined with Li(2)CO(3) it decreased to 10 min. The material also released Ca(2+) ions and alkalinized the medium. Moreover, the addition of additives (dispersant, plasticizer, and radiopacifier) improved its properties resulting in a material with a viscosity of 57 mPa s, enhanced handling properties, a mechanical strength of 81 MPa, a porosity of 4% and pores with small diameter (0.25 mum). MTA had no temperature increase (that indicates setting) up to 400 min, a mechanical strength of 34 MPa, and porosity of 28% with pores 2.5 mum in diameter. Conclusion The novel cement set more rapidly, had better fluidity, improved handling properties, higher mechanical strength, and reduced porosity with lower pore size compared to Gray-MTA Angelus.
Institute for Research and Development, University of Vale do Paraiba, São José dos Campos, SP.
This article was published in the following journal.
Name: International endodontic journal
Endodontic K-files are major tools for cleaning and shaping of the root canal systems. As there are various K-files available in Iranian market, the physical properties of the five available brands we...
A vertebral burst fracture (VBF) treated with vertebroplasty using a ceramic cement consists of four regions; native bone fragments, native ceramic cement, ceramic cement-trabecular bone (ceramic-bone...
We report methodological advances that enhance the phosphorescence efficiency of a blue-emitting calcium aluminate phosphor (CaAl2O4: Eu2+, Nd3+). The investigation of long-persistence blue-emitting p...
The aim of this in vitro study was to evaluate the effect of calcium hydroxide (CH) on push-out bond strength of white mineral trioxide aggregate (WMTA) and calcium-enriched mixture (CEM) cement in si...
Production of advanced biofuels from woody and herbaceous feedstocks is moving into commercialization. Biomass needs to be pretreated to overcome the physicochemical properties of biomass that hinder ...
The purpose of this study is to measure the mechanical properties of healing Achilles tendons in humans after early controlled weightbearing, compared with a control group in a randomized,...
It has been suggested that dietary fibers can affect food intake and satiation. Satiation, or meal termination, can be induced by sensory properties and energy density of fiber-rich food p...
The elimination of pathogenic microorganisms from the root canal system is one of the main points in order to have success in endodontic treatment. The objective of this study is to perfor...
The maintenance of primary teeth until their exfoliation has been one of the main purposes of Pediatric Dentistry, are they representing the fundamental basis for proper occlusion of the p...
Introduction: To evaluate the effect of untreated endodontic infection on periodontal status in untreated non vital teeth with periapical radiolucency as compared to contralateral vital t...
Substances used in biomedicine or dentistry predominantly for their physical, as opposed to chemical, properties.
The study of the physical and chemical properties of a drug and its dosage form as related to the onset, duration, and intensity of its action.
A genus of HALOBACTERIACEAE which are chemoorganotrophic and strictly aerobic. They have been isolated from multiple hypersaline environments that vary widely in chemical and physical properties.
A medical specialty concerned with the use of physical agents, mechanical apparatus, and manipulation in rehabilitating physically diseased or injured patients.
A fluorescent calcium chelating agent which is used to study intracellular calcium in many tissues. The fluorescent and chelating properties of Fura-2 aid in the quantitation of endothelial cell injury, in monitoring ATP-dependent calcium uptake by membrane vesicles, and in the determination of the relationship between cytoplasmic free calcium and oxidase activation in rat neutrophils.
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...
Acne Dermatology Eczema Psoriasis Wound Care Dermatology is the medical specialty concerned with the diagnosis and treatment of skin disorders (Oxford Medical Dictionary). As well as studying how the skin works, dermatology covers...