The core of Sandwich Design lies in its scientific layered configuration, typically consisting of three functional layers: a strong base layer, a flexible transition layer, and an aesthetic surface layer. The base layer, made of high-strength materials such as titanium alloy or zirconia, provides stable support and wear resistance; the transition layer enhances the bonding between layers and improves comfort; the surface layer is designed to match the color, texture and translucency of natural teeth, ensuring a seamless integration with the patient’s dentition. Efficient & Precise Modeling plays a critical role in realizing this layered structure, as it enables accurate 3D scanning of the patient’s oral structure and precise digital modeling of each layer, ensuring perfect fit and uniform thickness of the composite structure.