iarmsIARMSIARMS2709-325510.47310/iarms.2025.v06i01.001Advancements and Challenges of Composite Resins in Modern Restorative Dentistry: A Critical ReviewComposite resins have revolutionized restorative dentistry by offering aesthetic, durable, and minimally invasive solutions for dental restorations. Their ability to chemically bond to tooth structures, advancements in filler technology, and improved mechanical properties have made them a preferred choice over traditional materials like amalgam. The introduction of nanotechnology and bioactive resins has enhanced their wear resistance, aesthetics, and biocompatibility. However, composite resins are not without limitations. Polymerization shrinkage, wear over time, and sensitivity to technique significantly affect their longevity. Incremental layering, bulk-fill technology, and low-shrinkage monomers have been developed to mitigate these issues. Additionally, concerns about the biocompatibility of certain resins, particularly regarding the release of bisphenol A (BPA), have led to further research into safer alternatives. The success of composite resin restorations is also influenced by patient-specific factors, such as oral hygiene and occlusal forces, as well as operator-dependent variables, including material selection and application technique. Recent innovations in adhesive technology, smart materials, and self-healing composites hold promise for improving the longevity and functionality of these materials. This review critically examines the development, advantages, limitations, and future trends of composite resins, highlighting their impact on restorative dentistry. While ongoing research seeks to address existing challenges, composite resins remain a cornerstone in modern dental restorations, providing an optimal balance between functionality and aesthetics. Their continuous evolution, driven by technological advancements, ensures their relevance in restorative and cosmetic dentistry.