Shade-Matching Capacity of Omnichroma in Anterior Restorations

19-05-2020

According to a study by Tufts University School of Dental Medicine investigating if OMNICHROMA shade matching composite will modify its shade to match the new bleached surface it was cemented on prior to the bleaching, the composite changed to a lighter shade with the enamel that responded to bleaching.

Due to the fact that composites don’t change to a lighter shade, bleaching is usually recommended prior to receiving an anterior composite filling, so that the restoration is matched to the new, lighter tooth shade. The problem with that technique is when patients already have an existing asymptomatic restoration that will have to be replaced just to match the new shade.

To solve this problem, Tokuyama created a composite called OMNICHROMA. It is a shade matching composite that has gained a lot of popularity recently. According to the manufacturer, OMNICHROMA utilises “smart chromatic technology” which is able to capture the structural colour of its surroundings while conventional composites contain dyes or pigments. This is achieved by controlling the size of its filler particles.

In one study conducted by The University of Texas School of Dentistry at Houston the Visual Colour Adjustment Potential (CAP-V) of resin composites was analysed through visual evaluation. Among five test shades, OMNICHROMA exhibited the highest CAP-V, which showed smaller colour difference between tooth surface and OMNICHROMA, thus a better match on artificial denture teeth A1-D4.

Another study conducted by Nihon University School of Dentistry examined the colour-matching ability of OMNICHROMA and other resin composites. OMNICHROMA showed lower colour difference results signifying better colour match than the other composites as well as clinically acceptable results for all specimens filled with OMNICHROMA.

In a study conducted by Tokyo Medical and Dental University OMNICHROMA demonstrated significantly lower colour difference than the control composite, suggesting its superior ability in matching a patient’s original tooth colour. 

Using a shade matching composite like OMNICHROMA, dentists will be able to save time and money when restoring teeth, especially when in the aesthetic zone where these restorations are subject to a lot of attention.

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