ST Zirconia Block – Pre-Colored Dental Zirconia for Crowns and Bridges

Introduction

In modern dentistry, restorative materials must balance strength, durability, and natural aesthetics. Among these materials, the ST Zirconia Block has become a preferred choice for dental labs and clinics. With high flexural strength, optimized translucency, and pre-shaded options, it offers an excellent combination of performance and beauty for a wide range of dental restorations.

What Is an ST Zirconia Block?

The ST Zirconia Block is a type of dental zirconia block designed for CAD/CAM milling systems. It is pre-colored and available in multiple Vita shades (including BL1, BL2, BL3), ensuring natural-looking restorations that blend seamlessly with patients’ teeth.

This zirconia material combines strength (1100 MPa) with 43% translucency, making it suitable for both posterior durability and anterior aesthetics.

Properties of ST Zirconia Blocks

Sintered Density: 6.0 g/cm³ – ensures stability and long-term performance

Bending Strength: 1100 MPa – high fracture resistance for crowns and bridges

Translucency: 43% – provides lifelike, natural-looking restorations

Sintering Temperature: 1530°C – optimal densification for strength and accuracy

Pre-Shaded Colors: Full Vita 16 + extra shades (BL1, BL2, BL3)

These properties make ST zirconia blocks an ideal material for both anterior and posterior restorations.

Applications in Dentistry

ST Zirconia Blocks are compatible with most open CAD/CAM systems and can be used in:

Crowns – single or multiple unit restorations

Bridges – up to 14 units, providing strength and aesthetics

Inlays & Onlays – minimally invasive restorations

Partial Crowns – strong and aesthetic alternatives to full crowns

This versatility allows dental technicians to cover a wide range of clinical cases with a single material.

Advantages of ST Zirconia Blocks

Durability: High strength ensures long-lasting restorations

Aesthetic Results: Natural translucency and wide shade options

Biocompatibility: Safe for patients, with minimal risk of allergic reactions

Efficiency in Labs: Easy milling, predictable sintering, and reliable shade accuracy

Cost-Effective: Stronger than lithium disilicate, reducing risk of remakes

Comparison: ST Zirconia vs. Lithium Disilicate

Strength: ST Zirconia ≈ 1100 MPa vs. Lithium Disilicate ≈ 400 MPa

Aesthetics: Lithium disilicate offers excellent translucency but lower strength

Clinical Use: Zirconia is better for posterior and multi-unit restorations; lithium disilicate often preferred for single anterior crowns

By choosing the right material, dental professionals can balance both function and appearance.

Why Choose HONCHON as Your Zirconia Block Supplier?

Changsha HONCHON Technology Co., Ltd. is a leading manufacturer and supplier of dental zirconia blocks in China.

Manufacturing Expertise – Over a decade in zirconia production

Certifications – ISO 13485, CE, FDA certified

Global Reach – Supplying dental labs and distributors in 120+ countries

OEM/ODM Services – Custom shades, sizes, and private labeling available

Fast Delivery – Regular stock and customized production on request

By partnering with HONCHON, dental labs receive reliable, certified zirconia materials that ensure clinical success.

Frequently Asked Questions (FAQ)

1. What does ST mean in zirconia blocks?
ST stands for Super Translucent, referring to zirconia with higher light transmission for natural-looking restorations.

2. Are ST Zirconia Blocks suitable for anterior teeth?
Yes. With 43% translucency and multiple shade options, ST zirconia provides excellent aesthetics for anterior restorations.

3. Can ST Zirconia be used for long-span bridges?
Yes. With flexural strength of 1100 MPa, ST zirconia blocks are suitable for bridges up to 14 units.

4. What is the difference between ST Zirconia and HT Zirconia?

ST (Super Translucent): Balanced strength and translucency, suitable for both anterior and posterior.

HT (High Translucent): Higher transparency but slightly lower strength, often used in anterior restorations.

5. Are HONCHON zirconia blocks compatible with my milling machine?
Yes. HONCHON zirconia blocks are compatible with open CAD/CAM systems (98mm, 95mm, and AG sizes).

Conclusion & Call to Action

The ST Zirconia Block is an advanced material for dental labs and clinics, offering strength, aesthetics, and reliability in one solution. Whether for crowns, bridges, or minimally invasive restorations, ST zirconia ensures long-term success.

 Contact HONCHON Technology today to learn more about our dental zirconia blocks or request a quotation for your lab or clinic.