title: Bioactive materials improve some physical properties of a MTA-like cement.
abstract: One of the main disadvantages of MTA is its long setting time which could result in higher solubility and microleakage, producing a failed treatment. Studies have shown that the addition of bioactive glass may decrease the setting time. The aim of this study is to evaluate the compressive strength, setting time, solubility and radiopacity of a MTAlike experimental cement to which different percentage of wollastonite and bioactive glass are added. White MTA Angelus® was used as control; an experimental MTA-like cement (ExpC) was prepared using white Portland cement with 20wt% of Bi2O3; three wollastonite cement composites were prepared adding 10, 20 and 30wt% of wollastonite to ExpC, and three more adding the same proportions of bioactive glass. Compressive strength was tested according to ADA 30; radiopacity, setting time and solubility were tested according to ISO 6876. SEM observations of the surface were made after the solubility test. Compressive strength, setting time, solubility and radiopacity were reduced as the wollastonite increased; solubility increased with the addition of bioactive glass. The surfaces of MTA Angelus® and ExpC were smoother than Wollastonite and Bioactive glass groups. Addition of wollastonite and bioactive glass improved the physical properties of a MTA-like experimental cement, reducing the setting time with good solubility percentages, which would be an advantage in its clinical use.
authors.affiliation: Laboratorio de Biomateriales Dentales, División de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica S/N, México DF, Mexico. Electronic address: dra_abyfl@hotmail.com.
authors.forename: A
authors.initials: A
authors.lastname: Flores-Ledesma
authors.affiliation: Laboratorio de Biomateriales Dentales, División de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica S/N, México DF, Mexico.
authors.forename: F
authors.initials: F
authors.lastname: Barceló Santana
authors.affiliation: Laboratorio de Cristalofísica y Materiales Naturales, Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica S/N, México DF, Mexico.
authors.forename: L
authors.initials: L
authors.lastname: Bucio
authors.affiliation: Laboratorio de Microscopia, Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica S/N, México DF, Mexico.
authors.forename: J A
authors.initials: JA
authors.lastname: Arenas-Alatorre
authors.affiliation: Department of Periodontics, School of Dentistry, University of Pretoria, Intersection of Dr. Savage and Bophelo, Pretoria, South Africa.
authors.forename: M
authors.initials: M
authors.lastname: Faraji
authors.affiliation: División de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica S/N, México DF, Mexico.
authors.forename: A M
authors.initials: AM
authors.lastname: Wintergerst
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D019245:Compressive Strength; D003738:Dental Cements / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D003738:Dental Cements; C475480:MTA-Angelus; D010087:Oxides; D017640:Silicates; C031293:calcium silicate; D001729:Bismuth
keywords: Bioactive glass; Calcium silicates cement; MTA cement; Physical properties; Setting time; Wollastonite