Shade of resin-based luting agents and final color of porcelain veneers

A selection of abstracts of clinically relevant papers from other journals. The abstracts on this page have been chosen and edited by John R. Radford.

Abstract

All that is required is three shades of luting cement.

Main

Perroni AP, Amaral C et al. J Esthet Restor Dent 2016; 28: 295–303

Reported in a recent abstract summarised in this section of the Br Dent J (10.1038/sj.bdj.2017.74), the investigators suggest that, from a clinical perspective, it was equivocal as to whether or not different shades of resin cement can modify the final shade of the tooth. To the contrary, in this study the shade of the luting agent did influence the final shade. In this in vitro study, 1 mm monolithic and laminate ceramic discs were paired with resin composite discs (ca. 100 μm) of different shades (A2 and B1) and placed on a simulated dental substrate. A spectrophotometer measured the CIE L*a*b* colour coordinates. Glycerine was used to mimic the 'coupling agent'. The investigators suggest that the following three luting agent shades would be sufficient for shade matching: 'one white shade with a high value and high opacity' (white opaque), 'one white shade with high translucency', (translucent), 'and one shade that combines chroma and hue (such as A2).'