Riassunto analitico
Aim. To compare the color match of single-shade and simpli-shade resin composites, through instrumental and visual analyses.
Materials & Methods. 60 extracted human molars were evaluated with a spectrophotometer (VITA EasyshadeV) and then were divided in 3 different groups, called Light (VITA scale A1,B1,B2,C1,D2)(N=20), Medium (VITA A2,A3,C2,D3,D4)(N=20) and Dark (VITA A3.5,A4,B3,B4,C3,C4)(N=20). The partition was achieved following factory instruction of the SimpliShade resin composite (Kerr). Class V cavities were created on the buccal surfaces of each tooth. For each teeth group, 10 were restored with the correspondent simpli-shade composite (SimpliShade, Kerr) shadeand 10 with a single-shade (Omnichroma, Tokuyama) composite. A spectrophotometer (VITA Easyshade V) was used to evaluate the tooth/resin color match 24 h (T1) and one week (T2). Color variations (ΔE00) were calculated and statistically analyzed (P < 0.05). Visual analysis was also performed at T3 (14 days), giving to each specimen a score in a range from 0 (excellent match) to 4 (significant mismatch); scores were statistically analyzed. An instrumental evaluation using an artificial intellicence was performed at T4 (21 days).
Results. Spectrophotometric evaluations revealed significant differences between materials at T1 and T2 (P < 0.05). Visual analysis reported significant differences between materials for the light color only. There were significant differences between values obtained using a spectrophotometer and AI, for each color both at T1 and T2 against T4.
Conclusions. Data seem to indicate that group-shade composites seem to achieve a good color match with the surrounding tooth structure, and that having the choice to choose between few different shades increase the chance to achieve a perfect color match. Also, using AI for color evaluation could change the outcomes.
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