Injection Overmolding with Flowable Composite Resins for Direct Anterior Esthetic Solutions

Abstract

Managing anterior diastemata and open gingival embrasures has traditionally required either indirect restorations or complex incremental composite layering techniques. Injection overmolding offers a streamlined, additive direct restorative approach that combines customized matrix systems with modern flowable composite resins to achieve predictable esthetic outcomes. This article reviews matrix selection and customization, rubber dam isolation, adhesive protocols, composite placement, and finishing considerations. Three clinical cases covering a range of esthetic challenges illustrate the versatility of modern flowable resins with this method. Recent improvements in flowable composite resin strength, polishability, and color stability have made these materials viable alternatives to paste composites for single-shade monolithic anterior restorations. The injection overmolding technique simplifies the management of interproximal and subgingival areas while maintaining a conservative, reversible treatment philosophy.