Purpose: To determine by a spectrophotometric analysis the variations in color between the fabricated shade of four different porcelain systems and the intended shade when applied in a set thickness.
Methods: Four porcelain systems (Duceram Kiss, VITA Omega, Wieland Reflex, Ivoclar IPS d.SIGN) for metal ceramic restorations were selected. Three disk-shaped (15 mm diameter, 0.3 mm thickness) specimens per group were made for three different shades of the A color scale of the Vitapan classical shade guide. On a Cr-Co alloy, 0.15 mm of porcelain opaque and 1.0 mm of translucent porcelain was applied. The porcelain stratification was executed according to the manufacturers' indications. The color measures were made by the clinical spectrophotometer Easyshade.
Results: No statistically significant differences were found among the ceramic systems examined. The recorded differences in color between A2 porcelain disks and corresponding VITA shade tabs were closer (mean δE = 2.50) than those recorded for shade A3 (mean δE = 3.84) and shade A3.5 (mean δE= 3.94) (P< 0.05). (Am J Dent 2009;22:19-22).
|Number of pages||4|
|Journal||American Journal of Dentistry|
|Publication status||Published - 1 Feb 2009|