Graphy, a South Korean 3D printing materials developer, has successfully engineered a soft denture liner material, designated as GR-C, in collaboration with researchers from Dankoo...

Graphy, a South Korean 3D printing materials developer, has successfully engineered a soft denture liner material, designated as GR-C, in collaboration with researchers from Dankook University and Yonsei University. The findings, published in the Journal of the Mechanical Behavior of Biomedical Materials (JMBBM), detail a polyurethane acrylate (PUA) based composition that achieves mechanical properties comparable to traditional silicone-based liners. The material exhibits a storage modulus within the 0.4 to 4.4 MPa range, matching human oral mucosa elasticity, and maintains stability for 30 days while achieving a printing precision of 0.619 mm RMS deviation.

The development addresses a significant limitation in dental additive manufacturing, where manual fabrication of soft liners often leads to porosity, bacterial colonization, and plasticizer leaching. By transitioning to a digital workflow, Graphy aims to replace conventional labor-intensive casting methods with a more consistent, biocompatible, and automated process. This advancement positions the company to capture a larger share of the dental prosthetics market, specifically in the high-growth segment of patient-specific, long-term removable appliances.

Graphy must now focus on validating long-term adhesion to various denture base resins and completing rigorous clinical stability testing to ensure performance in complex oral environments. For dental laboratories and clinicians, this material offers a path toward fully digital, chairside-ready denture production. Success will depend on the material's ability to maintain its mechanical integrity under cyclic loading and moisture exposure over extended periods of use.