Influence of enamel prism orientations on color shifting at the border of resin composite restorations

TY - JOUR

T1 - Influence of enamel prism orientations on color shifting at the border of resin composite restorations

AU - Kano, Yukinori

AU - Nakajima, Masatoshi

AU - Aida, Asami

AU - Seki, Naoko

AU - Foxton, Richard M.

AU - Tagami, Junji

PY - 2018/1/1

Y1 - 2018/1/1

N2 - This study aimed to investigate the influence of enamel prism orientations on color adjustment of resin composite restoration. The color measurements (L*, C*, or h* values) at the restored bovine enamel disk (1.0 mm-thick) with resin composite (Estelite Asteria, Estelite Pro, Kalore, Clearfil Majesty) were performed using a CIE XYZ camera (RC500). The color shifting rate and range at the coronal and cervical border were calculated. The coronal border was significantly lower L* and C* color shifting rate than the cervical border (p<0.05). The L* color shifting range was significantly affected by regions in the 3-mm cavity group (p<0.05), but not in the 1-mm cavity group (p>0.05), while the C* color shifting range was not significantly affected by regions (p>0.05). The coronal enamel border with diagonal-cut of enamel prisms would have an advantage for color adjustment of resin composite restorations compared to the cervical border with longitudinal-cut of enamel prisms.

AB - This study aimed to investigate the influence of enamel prism orientations on color adjustment of resin composite restoration. The color measurements (L*, C*, or h* values) at the restored bovine enamel disk (1.0 mm-thick) with resin composite (Estelite Asteria, Estelite Pro, Kalore, Clearfil Majesty) were performed using a CIE XYZ camera (RC500). The color shifting rate and range at the coronal and cervical border were calculated. The coronal border was significantly lower L* and C* color shifting rate than the cervical border (p<0.05). The L* color shifting range was significantly affected by regions in the 3-mm cavity group (p<0.05), but not in the 1-mm cavity group (p>0.05), while the C* color shifting range was not significantly affected by regions (p>0.05). The coronal enamel border with diagonal-cut of enamel prisms would have an advantage for color adjustment of resin composite restorations compared to the cervical border with longitudinal-cut of enamel prisms.

KW - Color adjustment

KW - Color of resin composite

KW - Color shifting

KW - Enamel prism orientations

U2 - 10.4012/dmj.2017-094

DO - 10.4012/dmj.2017-094

M3 - Article

AN - SCOPUS:85044748638

SN - 0287-4547

VL - 37

SP - 341

EP - 349

JO - Dental Materials Journal

JF - Dental Materials Journal

IS - 2

ER -