Injection Molding and Palatal Silicone Key Combination: A Hybrid Approach for Complex Anterior Cases

Background/Objectives: This article presents a novel approach that combines the Palatal Silicone Key and Injection Molding techniques as a viable alternative for complex anterior cases with high esthetic demands, where layering multiple shades is essential to achieve a natural appearance, rather than using a single monochromatic composite. Methods: The Palatal Silicone Key technique utilizes a silicone index to transfer palatal and incisal anatomy from a diagnostic wax-up, allowing freehand layering of proximal and buccal surfaces with multiple composite shades. The Injection Molding technique provides a simpler and more predictable workflow by using a transparent silicone index to replicate the wax-up. However, the original injection technique relies on a single-shade composite, limiting the esthetic outcomes. In the presented case canines and first premolars were reshaped to replace congenitally missing lateral incisors. Palatal surfaces were built with medium-viscosity enamel shade composite using the silicone key, and dentin anatomy was sculpted freehand with dentin shade composite. Buccal anatomy was restored by injecting enamel shade flowable composite into the transparent index. Results: This combined protocol facilitated the precise transfer of the wax-up, minimizing adjustments, while the use of multiple composite shades reproduced the natural translucency of adjacent teeth, resulting in highly esthetic restorations. Conclusions: Handling traditional composites in complex anterior cases can be time-consuming and technique-sensitive. The presented combination of techniques, while requiring a high level of skill and precision, integrates the strengths of both approaches, enabling a minimally invasive, additive workflow with reduced clinical time and more predictable esthetic outcomes.