Chongqing Leomed Technology Co., Ltd.
| Place Of Origin | Chongqing, China |
| Sintering Temperature | 1530℃ |
| Fracture Toughness | >5 MPa·m1/2 |
| Indications | Crown, Bridge, Inlay, Onlay, Veneer |
| Compatibility | CAD/CAM Systems |
| Translucency | 42% |
| Material | Zirconia |
| Shade Options | 16 Shades |
| Manufacturer | ST Dental |
| Brand Name | LEOTECH |
| Model Number | ST-ML |
| Certification | CE |
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Product Specification
| Place Of Origin | Chongqing, China | Sintering Temperature | 1530℃ |
| Fracture Toughness | >5 MPa·m1/2 | Indications | Crown, Bridge, Inlay, Onlay, Veneer |
| Compatibility | CAD/CAM Systems | Translucency | 42% |
| Material | Zirconia | Shade Options | 16 Shades |
| Manufacturer | ST Dental | Brand Name | LEOTECH |
| Model Number | ST-ML | Certification | CE |
| High Light | 1100MPa Posterior Dental Crowns ，Posterior Dental Crowns Zirconia Block | ||
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
| Property | ST-ML Value | ISO 6872 Class 5 Req. |
|---|---|---|
| Flexural Strength | 1100 MPa | 800 MPa |
| Fracture Toughness | 6.5 MPa·m¹ᐟ² | 5.0 MPa·m¹ᐟ² |
| Translucency (1.0mm) | 42% | - |
| Chemical Solubility | <100 μg/cm² | <100 μg/cm² |
| Sintering Temperature | 1500°C (Recommended) | - |
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:
Uniform Density: 3.15±0.05 g/cm³ pre-sintered density.
Layer Precision: Gradient shading through controlled Y₂O₃ distribution (4.5-6.0%).
Impurity Control: <0.15% Al₂O₃ and <0.5% other oxides.
Advantages vs. Traditional Materials
| Feature | ST-ML Zirconia | Metal-Ceramic |
|---|---|---|
| Gum Discoloration | None | Gray margins |
| X-Ray Interference | Transparent | Opaque |
| Tooth Preparation | Minimal | Extensive |
| Aesthetic Lifespan | 10+ years | 5-7 years |
Company Details
Business Type:
Manufacturer,Trading Company
Year Established:
2019
Total Annual:
1000000-1500000
Employee Number:
100~150
Ecer Certification：
Verified Supplier
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 resea... 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 resea...
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