Physical Properties of Herculite XRV Ultra Nanohybrid Composite

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Objective: This study investigates and compares the physical properties of Herculite XRV Ultra, a novel nano-hybrid composite with high aesthetic properties including clinical gloss, clinical wear and polishability, to that of its micro-hybrid predecessor.

Method: In this study, the physical properties including compressive strength (CS), diametral tensile strength (DTS), flexural strength (FS), flexural modulus (FM) and Rockwell hardness (RH) of two dental restorative composites were determined for comparison. Physical properties were measured in accordance with ISO 4049 (FS), ADA Specification No.1 (CS), No. 27 (DTS) and Rockwell 15T instructions. Multiple samples were made for each composite, samples were cured according to manufacturers instructions and stored in 37°C water for >12 hours. Physical properties were measured and means and deviations were calculated. ANOVA (p<0.05) was conducted for each physical property to determine differences between the means.

Results: The data for each composite are reported in the attached table. Means with different superscript letters in each column are significantly different. Herculite XRV Ultra has statistically shown: improved CS and DTS, equivalent FS, and reduced FM and RH when compared to its micro-hybrid predecessor.

Conclusion: Overall, physical properties of Herculite XRV Ultra novel nano-hybrid composite are not compromised by improved aesthetic properties.