title: Mineral trioxide aggregate and portland cement for direct pulp capping in dog: a histopathological evaluation.
abstract: Background and aims. Mineral trioxide aggregate and calcium hydroxide are considered the gold standard pulp-capping materials. Recently, Portland cement has been introduced with properties similar to those of mineral trioxide aggregate. Histopathological effects of direct pulp capping using mineral trioxide aggregate and Portland cements on dog dental pulp tissue were evaluated in the present study. Materials and methods. This histopatological study was carried out on 64 dog premolars. First, the pulp was exposed with a sterile bur. Then, the exposed pulp was capped with white or gray mineral trioxide aggregates and white or gray Portland cements in each quadrant and sealed with glass-ionomer. The specimens were evaluated under a light microscope after 6 months. Statistical analysis was carried out using Kruskal-Wallis test. Statistical significance was defined at α=5%. Results. There was no acute inflammation in any of the specimens. Chronic inflammation in white and gray mineral trioxide aggregates and white and gray Portland cements was reported to be 45.5%, 27.3%, 57.1% and 34.1%, respectively. Although the differences were not statistically significant, severe inflammation was observed mostly adjacent to white mineral trioxide aggregate. The largest extent of increased vascularization (45%) and the least increase in fibrous tissue were observed adjacent to white mineral trioxide aggregate, with no significant differences. In addition, the least calcified tissue formed adjacent to white mineral trioxide aggregate, although the difference was not significant. Conclusion. The materials used in this study were equally effective as pulp protection materials following direct pulp capping in dog teeth.
authors.affiliation: Professor, Department of Endodontics, Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Bidar
authors.affiliation: Assistant Professor, Department of Endodontics, Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Neda
authors.initials: N
authors.lastname: Naghavi
authors.affiliation: Associate Professor, Department of Oral and Maxillofacial Pathology, Oral and Maxillofacial Disease Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Nooshin
authors.initials: N
authors.lastname: Mohtasham
authors.affiliation: Endodontist, Private Practice, Mashhad, Iran.
authors.forename: Mahshid
authors.initials: M
authors.lastname: Sheik-Nezami
authors.affiliation: 5General Dentist, Private Practice, Mashhad, Iran.
authors.forename: Amir
authors.initials: A
authors.lastname: Fallahrastegar
authors.affiliation: Assistant Professor, Department of Endodontics, Faculty of Dentistry, Tehran University Medical Sciences, Tehran, Iran.
authors.forename: Farzaneh
authors.initials: F
authors.lastname: Afkhami
authors.affiliation: Student of Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Negin
authors.initials: N
authors.lastname: Attaran Mashhadi
authors.affiliation: Veterinarian, DVM, Private Practice, Mashhad, Iran.
authors.forename: Iman
authors.initials: I
authors.lastname: Nargesi
keywords: Direct pulp capping; Portland cement; histological evaluation; mineral trioxide aggregate