- OA3 opalescent A3 shade adds dentin-layer opacity
- 0.65 contrast ratio helps control dark show-through
- 3.8 g syringe supports precise incremental layering
- 100% spherical supra-nano fillers enhance polish
- RAP Technology provides 90 sec work, 10 sec cure
- Quantity: 1 per Pack
Tokuyama Estelite Sigma Quick Syringe, OA3, 3.8 g is used for direct anterior and posterior restorations that require an opalescent A3 shade with added opacity for controlled dentin replacement and esthetic layering. OA3 provides a deeper opalescent option within the OA shade group, helping reduce dark oral-cavity influence while maintaining an A3-oriented color relationship with adjacent tooth structure.
In a Class IV restoration with significant incisal loss, the material can be placed as an internal dentin-style layer to limit gray show-through before a more translucent outer layer is added. It is also suitable for Class III restorations, composite veneers, diastema closure, and composite or porcelain repair when increased opacity and A3 shade character are clinically appropriate.Each pack contains 1 syringe with 3.8 g of OA3 Estelite Sigma Quick light-cured universal composite. Dental offices ordering opalescent composite from their supplier can buy this OA3 configuration for cases requiring greater opacity and an A3-oriented color relationship with adjacent tooth structure than standard body shades provide.
OA3 is classified as an opalescent specialty shade and has a contrast ratio of approximately 0.65, providing greater opacity than standard body shades while remaining less opaque than the dedicated OPA2 shade. The composite uses 100% spherical supra-nano fillers with 82% filler by weight and 71% by volume, supporting surface smoothness, wear resistance, radiopacity, and durable gloss. The syringe format permits controlled dispensing for incremental placement, while the sculptable, non-sticky consistency helps maintain incisal form, proximal anatomy, and layered contours before light activation.Estelite Sigma Quick uses Tokuyama’s Radical Amplified Photopolymerization Technology, or RAP Technology, to combine extended working time with efficient curing.
Under specified ambient-light conditions, the material provides up to 90 seconds of manipulation time, allowing additional opportunity to refine dentin replacement, contour, and layer thickness before polymerization. With appropriate curing-light output and qualifying increment depth, curing can be completed in approximately 10 seconds. Uniform spherical fillers promote controlled light diffusion, contributing to optical integration, high polishability, gloss retention, and reduced wear against opposing dentition.
This OA3, 3.8 g syringe variant is distinguished by its deeper opalescent A3 shade, intermediate opacity, and suitability as an internal restorative layer when standard A3 material may allow too much background darkness to influence the final appearance.
