Instrumental and visual evaluation of the color adjustment potential of resin composites

Abstract

Objective To evaluate the instrumental and visual color adjustment potential (CAP‐I, CAP‐V), of resin composites. Methods Resin composites tested were Omnichroma, Filtek Supreme Ultra, TPH Spectra, Herculite Ultra, and Tetric EvoCeram. Two types of specimens, “dual” and “single” were evaluated. For dual specimens, class I preparations (4 mm‐diameter, 2 mm‐depth), were created in denture teeth and restored with test resin composites. For single specimens, replications of denture teeth were created using the test resin composites (n = 5) and compared with unrestored denture teeth. Reflectance values were obtained using a spectroradiometer. CAP‐I and CAP‐V were calculated. Fisher PLSD intervals for comparison of means were calculated at the 0.05 level of significance. Results CAP‐I ranged between 0.02 and 0.67. The Fisher PLSD interval for comparisons between single/dual color differences was 0.09 (P < .0001, power 1.0) and for comparisons between materials and shades 0.18 and 0.33, respectively (P < .0001, power 1.0). CAP‐V ranged between 0.16 and 0.60. The Fisher PLSD interval for comparisons between single/dual visual color differences was 0.05 (P < .0001, power 1.0) and 0.08 and 0.14 for comparisons between materials and shades, respectively (P < .0001, except Herculite Ultra‐Tetric EvoCeram and certain shade pairs). Conclusions Instrumental color differences and visual rating of single specimens were the greatest for Omnichroma, indicating the largest mismatch, while the instrumental and visual color differences of dual specimens were the smallest. Omnichroma had the most pronounced CAP‐I followed by Tetric EvoCeram>TPH Spectra = Filtek Supreme Ultra >Herculite Ultra. Similarly, Omnichroma exhibited the most pronounced CAP‐V followed by Tetric EvoCeram>TPH Spectra = Herculite Ultra = Filtek Supreme Ultra. Clinical significance Resin composites with pronounced CAP blends with surrounding enamel and dentin, resulting in reduced color differences and therefore improving the esthetic appearance of the restoration, simplifying the shade matching and compensating for any color mismatch.

Color match using instrumental and visual methods for single, group, and multi‐shade composite resins

“…The results obtained from the visual evaluation of shade match seem to concur with the instrumental evaluation in the finding that the performance of single‐shade composite systems became unpredictable with a decrease in value and increase in the chroma of the acrylic teeth. This is in opposition to a previous study, where OM exhibited the most pronounced CAP (blended in the best) throughout the VITA shade range 6 . In this experiment, the size of the restoration was kept constant as opposed to a previous study by Paravina et al 4 It might be interesting to perform a similar evaluation with a single‐shade composite system to see if a decrease in the restoration size increases the BE of such a composite.…”

“…OM is composed of 260 nm supranano‐spherical fillers of silicon dioxide (SiO 2 ) and zirconium dioxide (ZrO 2 ). The red‐to‐yellow color from the material combines with the reflected color of the patient's surrounding dentition, to provide an ideal shade match for any tooth shade 6 …”

“…They found that OM (a single‐shade material) had a more positive CAP‐I and CAP‐V than the other materials which had been developed for specific shades. This meant that OM blended in with the surrounding tooth structure, resulting in a reduced color difference between the two 6 . Abdelraouf et al 7 assessed the color match and BE of a universal shade composite (X‐TraFil) placed in composite resin models of different shades (Grandio; A1, A2, A3, A3.5, and A4) and cavity sizes, and in natural teeth.…”

Shape-Memory Polymers in Dentistry: Systematic Review and Patent Landscape Report

“…As colour and aesthetics of teeth play a remarkable role in patient’s acceptance of restorations, selecting a correct shade to maximize the reproduction of natural teeth appearance become crucial for clinicians. Simplifying the selection of colour, reducing the number of shades, without compromising the esthetic outcome, leads to the necessity of new smart chromatic materials [101].…”

<p>Color stability of Lucirin-photo-activated resin composite after immersion in different staining solutions: a spectrophotometric study</p>

“…[1][2][3][4] Tooth color is determined by a combination of complex optical properties of both enamel and dentin, as well as the surrounding soft tissues. [5][6][7][8][9] In the oral cavity, teeth are prone to decay, discoloration, trauma, or fracture.…”