Evaluation of the Color Adjustment Potential of Single-Shade Composite Resin in Primary Teeth

Abstract

Restoring composite resins with the optimal shades for all primary teeth is a great challenge for pediatric dentists. A newly developed single-shade composite resin can exhibit a color similar to that of the surrounding tooth structure based on the structural color phenomenon. This study aims to evaluate the color adjustment potential (CAP) of a single-shade composite resin compared to conventional multi-shade composite resins in primary teeth. A single-shade composite resin and two conventional multi-shade composite resins were included in this study. Two types of specimens, a single specimen and a dual specimen, were evaluated. For single specimens, duplications of the primary second molar denture teeth were made using experimental composite resins. For dual specimens, cavities were prepared on the buccal surfaces of extracted primary second molars and restored with experimental composite resins. The L*, a*, and b* values were measured using a colorimeter for the extracted teeth and specimens. The mean ΔE<sub>ab</sub><sup>*</sup> values for single and dual specimens and CAP were calculated. Bonferroni post-hoc analysis was performed to confirm the statistical significance between the ΔE<sub>ab</sub><sup>*</sup> and CAP values of the experimental resins. Among the single specimens, the single-shade composite resin showed significantly higher ΔE<sub>Single</sub> compared to other composite resins (<i>p</i> < 0.0167). There was no significant difference between ΔE<sub>Dual</sub> for all experimental resins. The single-shade composite resin showed highest CAP compared to other multi-shade composite resins. A single-shade composite resin exhibited the most prominent color adaptability compared to other conventional multi-shade composite resins for primary second molars. A single-shade composite resin can simplify shade matching and provide esthetic outcomes for the restoration of primary second molars.

Color Matching of Single-Shade Composite Resin by Various Pulp Capping Materials in Anterior Teeth

“…Color evaluation results using a spectrophotometer showed that the ΔE ab * value for the control group with the restoration solely done with Omnichroma was 3.20, demonstrating the lowest value and falling within the clinically acceptable range, consistent with previous Omnichroma color matching studies [8,11,22]. The UB and TC groups exhibited higher values of 3.39 and 4.15, respectively, than the control group; however, these differences were not statistically significant.…”

“…According to previous studies, the clinically acceptable range of ΔE* varies from 3.3 to 3.7. However, in this study, we utilized the widely adopted standard of 3.3, established by the U.S. Public Health Service, for our color difference assessment [22][23][24].…”

Applications of artificial intelligence in dentistry: A comprehensive review

“…1 Learning from the nature as to what should be mimicked begins with the creation of databases on the fundamental optical properties of human teeth (permanent and primary) and gingiva. [203][204][205] The FL and…”

“…Learning from the nature as to what should be mimicked begins with the creation of databases on the fundamental optical properties of human teeth (permanent and primary) and gingiva 203–205 . The FL and TSK fuzzy system exhibits great potential for approximating color perception in the calculation of color difference thresholds in the realm of dentistry.…”

Comparison of Surface Microhardness of the Flowable Bulk-Fill Resin and the Packable Bulk-Fill Resin according to Light Curing Time and Distance

“…In addition, there are disadvantages such as long working time, sensitivity to moisture and contamination, as well as polymerization shrinkage, which are more prominent when treating children 4) . In order to prevent polymerization and shrinkage of the composite resin, the layered filling method was used, but when layered filling is performed, there are problems in that the treatment time is prolonged even if the operator is highly skilled, and it is not easy to control moisture and contamination 5) .…”