title: Effect of enamel margin configuration on color change of resin composite restoration.
abstract: This study aimed to investigate the effect of enamel margin configuration on color change of resin composite restoration. Enamel disks of 1.0 mm-thick were sliced from sixty bovine anterior teeth and divided into three groups by margin configuration (non-bevel, 45-degree bevel and 45-degree reverse-bevel). The color measurements (L*C*h* values) at the restored bovine enamel disk with resin composite (Estelite Asteria, Estelite Pro, Kalore, Clearfil Majesty) were performed using a digital camera with CIE XYZ color gamut (RC500). All the resin composite restorations with non-beveled and beveled cavities significantly increased L* values compared with the control composite disks (p<0.05). The bevel preparation increased L* values toward the enamel-composite border with gentle inclination, while the reverse-bevel preparation was significantly lower L* values at the enamel-composite border than the non-bevel preparation (p<0.05). Enamel margin configuration affected color shifting of resin composite restoration and color adjustment of the border.
authors.affiliation: Cariology and Operative Dentistry, Oral Restitution Department, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
authors.forename: Asami
authors.initials: A
authors.lastname: Aida
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Nakajima
authors.forename: Naoko
authors.initials: N
authors.lastname: Seki
authors.forename: Yukinori
authors.initials: Y
authors.lastname: Kano
authors.forename: Richard M
authors.initials: RM
authors.lastname: Foxton
authors.forename: Junji
authors.initials: J
authors.lastname: Tagami
mesh_terms: D000818:Animals; D002417:Cattle; D003116:Color; D003188:Composite Resins; D003731:Dental Caries; D003737:Dental Cavity Preparation; D003743:Dental Enamel; D003793:Dental Restoration, Permanent
chemical_list: D003188:Composite Resins