title: An optical investigation of dentinal discoloration due to commonly endodontic sealers, using the transmitted light polarizing microscopy and spectrophotometry.
abstract: The aim of this study was to establish the degree of tooth crown staining by commonly used endodontic sealers. Crown discolorations by tooth canal sealers [AH Plus (Dentsply DeTrey Gmbh, Konstanz, Germany); Endofill (Produits Dentaires SA, Vevey, Switzerland); Apexit (Dentsply DeTrey Gmbh, Konstanz, Germany); and MTA Fillapex (Angelus, Londrina, Brazil)] were tested on extracted human premolars. The samples were divided into five groups of five samples each, after root canal sealing. Five teeth were used as control groups. The spectrophotometric method was performed in order to quantify in terms of color change of the coronal part (it was also recorded a track on how the color changes over time). For the microscopic study of the extracted dental specimens subjected to this study, polarized transmitted light microscopy was used. This method involves the development of special microscopic preparations, called "thin sections". In our case, the thin section was performed on 20 prepared and obturated recently extracted teeth. The degree of discoloration was determined after one week and three months using spectrophotometry and polarized light microscopy. All sealers usually cause some degree of discoloration on the cervical aspect of the crowns that increases in time. AH Plus and Endofill caused the greatest discoloration, followed by Apexit and MTA Fillapex.
authors.affiliation: Department of Endodontics, Faculty of Dental Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania; joa_suciu@yahoo.com.
authors.forename: Ioana
authors.initials: I
authors.lastname: Suciu
authors.forename: Ecaterina
authors.initials: E
authors.lastname: Ionescu
authors.forename: Bogdan Alexandru
authors.initials: BA
authors.lastname: Dimitriu
authors.forename: Ruxandra Ioana
authors.initials: RI
authors.lastname: Bartok
authors.forename: Georgiana Florentina
authors.initials: GF
authors.lastname: Moldoveanu
authors.forename: Irina Maria
authors.initials: IM
authors.lastname: Gheorghiu
authors.forename: Ileana
authors.initials: I
authors.lastname: Suciu
authors.forename: Mihai
authors.initials: M
authors.lastname: Ciocîrdel
mesh_terms: D003116:Color; D003739:Dental Cementum / Q000033:anatomy & histology; D003743:Dental Enamel / Q000033:anatomy & histology; D003804:Dentin / Q000737:chemistry*; D004708:Endodontics; D006801:Humans; D008859:Microscopy, Polarization / Q000379:methods*; D055095:Optics and Photonics / Q000379:methods*; D012387:Root Canal Filling Materials / Q000494:pharmacology*; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D012387:Root Canal Filling Materials