Minimally Invasive Oral Rehabilitation Using 3D-Printed Resins in a Patient With Severe Dental Erosion and Bruxism

Oral rehabilitation of patients with severe tooth wear (STW) and loss of vertical dimension of occlusion (VDO) remains a clinical challenge. While ceramics are the traditional choice, 3D-printed resin composites (3D-PRCs) have emerged as a minimally invasive and cost-effective alternative. A young adult patient with severe erosive and attrition wear associated with bruxism presented with an 8-mm discrepancy between vertical dimension at rest (VDR) and VDO. A fully digital workflow was utilized to plan a 5-mm VDO increase, maintaining a 3-mm freeway space. Following clinical validation via a functional mock-up, the patient was restored using a highly filled 3D-printed nanohybrid composite (Voxelprint Ceramic; FGM Dental Products, Joinville, SC, Brazil). The additive manufacturing approach allowed for ultraconservative preparations of 24 teeth, guided by a digital wax-up, prioritizing enamel preservation through minimal surface regularization with chamfer (crowns, onlays, and overlays) and minichamfer (veneers) finish lines. Restorations were cemented using a standardized adhesive protocol: light-cured resin cement for anterior veneers and dual-cure resin cement for posterior restorations, including silanization of the 3D-printed surfaces. According to FDI criteria, the restorations exhibited excellent functional, esthetic, and biological properties, effectively restoring the patient's vertical dimension and occlusal balance. After that, the patient was referred for the fabrication of a 3D-milled Michigan occlusal splint. The integration of 3D-PRCs into a digital workflow provided a predictable and accessible solution for complex functional rehabilitation. This material's mechanical properties, such as high microhardness or flexural resistance, make it particularly suitable for patients with parafunctional habits. Although short-term outcomes are promising, longitudinal studies are essential to validate the long-term performance of ceramic-reinforced resins as a definitive restorative treatment.