ST-ML Multi-Layer Zirconia Block , 1100MPa Strength , 16 Shades for Posterior Dental Crowns

ST-ML Multi-Layer Zirconia Block , 1100MPa Strength , 16 Shades for Posterior Dental Crowns

The ST-ML Multi-Layer Zirconia Block is China's most widely used pre-shaded zirconia solution, engineered specifically for high-strength posterior restorations. With 16 gradient shades (A1-D4) and 1100MPa flexural strength, it exceeds ISO 6872 Class 5 requirements for multi-unit bridges involving molar restoration. The material’s unique layered structure mimics natural dentin-enamel transitions, eliminating manual staining while maintaining 42% translucency for lifelike aesthetics in high-chewing-stress zones.

Key Characteristics

• Multi-Shade Efficiency: 16 pre-shaded options (A1, A2, A3, A3.5, A4, B1-B4, C1-C4, D2-D4) bypass coloring/drying steps (Page 14).

• Mechanical Superiority: 6.5 MPa·m¹ᐟ² fracture toughness prevents chipping under occlusal forces.

• Aging Resistance: <15% monoclinic phase after accelerated aging ensures long-term stability.

• Biocompatibility: 0-level cytotoxicity and <0.1 Bq/g radioactivity meet medical safety standards.

Technical Specifications

Clinical Applications
Optimized for posterior full-contour crowns and bridges (up to 4+ units), the ST-ML’s 1350 HV10 hardness withstands molar chewing forces. Its low thermal expansion (CTE: 10.5±0.5×10⁻⁶/K) minimizes sintering deformation, while the gradient shade layers provide:

• Natural Depth Effect: Seamless transition from cervical to incisal zones.

• Time Savings: Direct sintering after CAD/CAM milling (no staining).

• Cost Efficiency: Replaces metal-ceramic systems with 30% less tooth reduction.

Production Excellence
Fabricated via cold isostatic pressing (CIP) and nano-powder synthesis, each block ensures:

1. Uniform Density: 3.15±0.05 g/cm³ pre-sintered density.

2. Layer Precision: Gradient shading through controlled Y₂O₃ distribution (4.5-6.0%).

3. Impurity Control: <0.15% Al₂O₃ and <0.5% other oxides.

Advantages vs. Traditional Materials

Chongqing Leomed Technology Co., Ltd. is a rapidly growing and professional company that specializes in providing dental CAD/CAM solutions to customers worldwide. With a strong focus on “innovation, precision, validation, and customer satisfaction”, we invest significant efforts in research and development to meet the evolving needs of our clients.

Our range of high-quality, reliable, and cost-effective dental laboratory solution includes the restorative materials, such as dental zirconia blocks and lithium disilicate, equipment such as milling machines, sintering furnaces, porcelain furnaces, 3D scanners and 3D printers. These solutions enable the production of a wide range of restorations, such as crowns, inlays, bridges, veneers, abutments, screw-retained crowns, digital dentures, dental models, implant guides, and occlusion splints. Our aim is not only to satisfy clinic needs but also to create values.

To ensure the utmost satisfaction of our esteemed clientele, we are committed to continuously improving our after-sales services and providing comprehensive support. our experienced staff members are always available to discuss specific requirements, striving to create maximum value for our customers.