title: Evaluation of crown discoloration induced by endodontic sealers and colour change ratio determination after bleaching.
abstract: The aim of this study was to evaluate tooth discoloration after the use of root canal sealers and the effect of internal bleaching on sealer discoloration. The crowns of 56 incisors were cut and randomly filled with four sealers (n = 14): Pulpispad, AH26, MTA Fillapex, EndoREZ. The colour measurement was taken with a spectrophotometer prior and after placement of sealers. Colour changes (ΔE) were recorded after 4 weeks then sealers were removed and an internal bleaching treatment was performed. After bleaching treatment colour changes (ΔE) were measured. Data were analysed using ANOVA and Tukey's test (α = 0.05). All tested sealers induced varying chromatic alterations. Pulpispad showed statistically more discoloration than other sealers (P < 0.05). After bleaching, EndoREZ showed statistically more bleaching ratio than MTA Fillapex and AH26 (P < 0.05). Internal bleaching was efficient in discoloured teeth induced by root canal sealers.
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
authors.forename: Mügem Aslı
authors.initials: MA
authors.lastname: Gürel
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
authors.forename: Bağdagül Helvacioğlu
authors.initials: BH
authors.lastname: Kivanç
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
authors.forename: Adil
authors.initials: A
authors.lastname: Ekici
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
authors.forename: Tayfun
authors.initials: T
authors.lastname: Alaçam
mesh_terms: D003116:Color; D003442:Crowns; D006801:Humans; D012387:Root Canal Filling Materials; D019228:Tooth Crown; D014075:Tooth Discoloration
chemical_list: D012387:Root Canal Filling Materials
keywords: discoloration; internal bleaching; sealer; spectrophotometer