Color evaluation of a one-shade used for restoration of non-carious cervical lesions: an equivalence randomized clinical trial
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Date
2024-12-01
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Publisher
BMC ORAL HEALTH
Abstract
Background Obtaining a perfect color match with resin composite presents a significant challenge. The chameleon
effect has enabled resin composite to mimic the color of the adjacent tooth structure in vitro. This double-blind,
split-mouth and equivalent randomized clinical trial evaluated the color matching of one-shade resin composite with
chameleon effect versus multi-shade resin composite in non-carious cervical lesion restorations (NCCLs).
Methods One hundred twenty restorations were performed on NCCLs with two restorative materials (n=60). After
prophylaxis, the teeth were isolated with rubber dam and one universal adhesive was applied in the selective enamel
etching strategy. For both groups, the restorations were inserted incrementally. The values of ΔEab and ΔE00 in the
cervical and middle third were evaluated using a digital spectrophotometer before vs. after the restorations. The
restorations were evaluated at baseline and after 7 days, 6-, 12- and 18-month of clinical performance according to
the FDI criteria (Word Federation Criteria). Statistical analysis was performed using Chi-square test for all parameters.
Color change was analyzed by two one-sided t-tests for paired samples (α=0.05).
Results Regarding the color measurement no significant difference was observed when Vittra APS (FGM Dental
Products, Joinville, SC, Brazil) was compared to Vittra Unique (FGM Dental Products, Joinville, SC, Brazil) for any of the
comparisons performed (p>0.05). However, the ΔEab and ΔE00 values for the cervical third, both before and after the
restorations, were higher compared to the ΔEab and ΔE00 values observed when comparing the cervical and middle
thirds after the restorations. After 18 months, five restorations exhibited minimal discrepancies in terms of marginal
adaptation or marginal discoloration (p>0.05). In all other criteria, including retention rate, no changes were detected
at the 18-month recall.
Conclusions The one-shade resin composite used achieve the same color match when compared to a multi-shade
resin composite after a period of 7 days in NCCLs. Overall, the restorations scored clinically very good (FDI) at baseline
and after 18 months for all outcomes.