Multilayer zirconia blocks: a smart gradient revolution in all ceramic dental restorations

The emergence of Multilayer Zirconia Blocks marks a significant breakthrough in materials science in the field of dental all ceramic restoration, which pursues the perfect integration of strength and aesthetics. This innovative pre colored, gradient transmission zirconia blank successfully overcomes the aesthetic limitations of traditional monochromatic zirconia by precisely controlling the internal structure and composition gradient, providing unprecedented biomimetic effects and clinical adaptability for restorations such as crowns and bridges.

Core advantage: Smart balance between strength and aesthetics

Gradient biomimetic aesthetics: The core of multi-layer zirconia blocks lies in their intricate layered structure. 

Usually includes:

High strength base layer: located in the occlusal functional area, it has ultra-high bending strength (up to 1200 MPa or more), ensuring the robustness and reliability of the restoration when subjected to enormous chewing forces.

Neck shading layer: close to the gingival margin, with high saturation and low translucency, effectively covering the base color of the abutment teeth (such as metal post cores and discolored teeth), avoiding graying of the restoration neck, and achieving a natural transition.

Body and Cut End Translucent Layer: Simulating the structure from the middle to the cut end of a natural dental crown, the translucency (semi transparency) gradually increases. The cutting layer has a translucent effect similar to natural tooth enamel, which can capture and reflect light, presenting a dynamic sense of hierarchy and depth.

Accurate color matching: Each layer has been accurately pre colored before sintering, forming a natural color gradient from the neck to the cutting end (such as A1 to A3, or B1 to B2). This not only greatly simplifies the steps of external dyeing for technicians, but more importantly, achieves a highly simulated internal color hierarchy, making the restoration appear extremely natural under different lighting and angles.

Excellent mechanical performance: Based on yttrium stabilized tetragonal zirconia polycrystals (Y-TZP), multi-layer zirconia inherits its ultra-high strength, excellent toughness, and wear resistance. Even in high aesthetic requirements for cut end translucent layers, its strength far exceeds traditional glass ceramics (such as lithium disilicate), making it suitable for making fixed bridges with larger spans (such as anterior three unit and posterior four unit bridges), as well as single crowns and high embedded structures in the molar area