Chronological enamel hypoplasia is an acquired developmental defect of enamel that usually affects the permanent dentition. This defect significantly affects aesthetics and function, particularly in adolescents, impacting their self-image and social interactions.
Objectives: This study aimed to assess and compare the one-year clinical performance of an injectable giomer and an injectable composite resin for restoring enamel-hypoplastic permanent anterior teeth in children and adolescents using the injection molding technique evaluated by the modified FDI criteria.
Materials and Methods:
A total of 154 hypoplastic permanent anterior teeth were restored using the injection molding technique in a two-arm, parallel-design clinical trial. Patients’ arches were randomly assigned to either Group A (GC G-aenial Universal Injectable) or Group B (Beautifil Flow, Giomer). The restorative procedure comprised an indirect phase (wax-up and clear index preparation) and a direct phase (tooth preparation, etching, bonding, and injection-molded restoration using a clear index). Restorations were finished with stones and discs, followed by polishing with diamond paste. Clinical evaluation was conducted at 3, 6, and 12 months using the modified FDI criteria by two blinded evaluators. Quality of life of recruited patients was evaluated before and after dental treatment.
Results: Both injectable restorations proved to be successful when applied via the injection molding technique.
Conclusions: Injection molding restorative technique may provide a smart treatment option for anterior teeth affected by chronological enamel hypoplasia. Quality of life of children diagnosed with enamel hypoplasia improves dramatically after esthetic treatment of hypoplastic anterior teeth.

This study aimed to assess and compare the one-year clinical performance of an injectable giomer and an injectable composite resin for restoring enamel-hypoplastic permanent anterior teeth in children and adolescents using the injection molding technique evaluated by the modified FDI criteria.