With a conservative approach in mind, the restorative team should be able to provide patients with minimally invasive, highly esthetic, and long-lasting solutions. This lecture focus on key principles and the effect of light dynamics have on various direct composite materials as a foundation to create imperceptible composite restorations. In addition, this presentation provides a systematic and scientific approach for selecting esthetic treatment modalities based on original research data with special emphasis on techniques and new materials design and selection.   ( disclaimer )