ST Pre-shaded Zirconia Disc(98mm) - Open System Dental Block

Milling & Processing Workflow:

Step 1: CAD Design & Milling (30-45 minutes)

• Design restoration with 20-25% enlargement to compensate for sintering shrinkage
• Use wet milling for optimal results and minimal tool wear
• Recommended bur: 1.0-2.0mm diameter carbide or diamond burs
• Milling speed: 20,000-40,000 RPM
• Feed rate: Moderate (adjust based on detail complexity)
• Mill in pre-sintered state (pre-shaded, porous material)

Step 2: Sintering (8-10 hours) – NO STAINING NEEDED

• Place milled restoration directly in the sintering furnace (skip staining step)
• Follow the recommended sintering cycle (see table above)
• During sintering, the pre-integrated color becomes fully developed and fixed
• Material shrinks 20-25% and becomes fully dense and strong (1200 MPa)
• Ensure proper support to prevent warping
• Allow complete cooling before handling

Step 3: Glazing (Optional) & Cementation

• Optional: Apply glaze for enhanced surface finish (fire at 800-900°C)
• Optional: Apply surface stains for characterization if needed
• Check fit and make minor adjustments if needed
• Clean thoroughly before cementation
• Use resin-modified glass ionomer or resin cement
• Consider airborne particle abrasion for improved bond strength

⏱️ Time-Saving Advantage: Pre-shaded zirconia eliminates the 10-20 minute staining step required for white zirconia. Simply mill and sinter – the color is already integrated! This streamlines your workflow and ensures consistent shade results every time.

Why Choose ST Pre-shaded Zirconia?

The ST Pre-shaded Zirconia is developed for laboratories seeking maximum efficiency without compromising quality. With the same 1200 MPa strength and 43% translucency as ST White, but with color already integrated, it offers:

• Time Savings: Eliminate the staining step (10-20 minutes per case)
• Consistency: Factory-controlled shading ensures predictable, batch-to-batch color matching
• Simplified Workflow: Fewer steps mean fewer opportunities for error
• Cost Efficiency: No need for staining liquids or additional equipment
• Versatility: 16 Vita shades (A1-A4, B1-B4, C1-C4, D2-D4) + 4 Bleach shades (BL1-BL4)

ST Pre-shaded vs ST White Zirconia

Recommendation: Choose ST Pre-shaded for high-volume production and standard Vita shade matching. Choose ST White for custom shade requirements or when you need specific color control.

Designed for Dental Laboratories

OnePro Dental works directly with dental laboratories worldwide, providing reliable CAD/CAM materials that combine performance, consistency, and cost efficiency.

The ST Pre-shaded Zirconia Disc is an excellent choice for labs seeking to streamline workflows and increase daily production capacity without compromising on quality.

Frequently Asked Questions (FAQ)

💎 Product Features & Pre-shaded Advantages

Q: What makes ST Pre-shaded Zirconia different from ST White?
A: ST Pre-shaded has the same 1200 MPa strength and 43% translucency as ST White, but the color is already integrated into the material during manufacturing. This eliminates the manual staining step, saving 10-20 minutes per case and ensuring consistent, predictable shade results.

Q: How many shade options are available?
A: ST Pre-shaded Zirconia is available in 20 comprehensive shades:
• 16 Vita shades: A1, A2, A3, A3.5, A4, B1, B2, B3, B4, C1, C2, C3, C4, D2, D3, D4
• 4 Bleach shades: BL1, BL2, BL3, BL4
This complete range covers all clinical needs from natural tooth colors to cosmetic whitening cases.

Q: Can I still apply surface stains for characterization?
A: Yes! While the base color is pre-integrated, you can still apply surface stains after sintering for additional characterization, incisal effects, or fine-tuning. The pre-shaded base provides a consistent foundation.

Q: Is the color consistent between batches?
A: Yes! Factory-controlled pre-shading ensures excellent batch-to-batch consistency. Unlike manual staining which can vary based on the technician's technique, pre-shaded zirconia delivers predictable results every time.

🔧 Milling & Processing

Q: Which CAD/CAM systems are compatible with ST Pre-shaded Zirconia?
A: ST Pre-shaded Zirconia Disc (98mm) is compatible with most open CAD/CAM milling systems, including Roland, VHF, Amann Girrbach, Sirona, and similar 98mm disc systems.

Q: What milling parameters should I use?
A: Recommended parameters:
• Bur size: 1.0-2.0mm diameter carbide or diamond burs
• Milling speed: 20,000-40,000 RPM
• Feed rate: Moderate (adjust based on detail)
• Milling type: Wet milling preferred
• Enlargement factor: 20-25% to compensate for sintering shrinkage

Q: Do I need to stain before sintering?
A: No! This is the key advantage of pre-shaded zirconia. Simply mill and sinter – the color is already integrated. This saves 10-20 minutes per case and eliminates the staining step entirely.

Q: What is the linear shrinkage rate?
A: ST Pre-shaded Zirconia has a linear shrinkage rate of approximately 20-25% during sintering. Always design and mill restorations with this enlargement factor to achieve the correct final size.

🎨 Shade Selection & Esthetics

Q: How do I choose the right shade?
A: Select the Vita shade that matches your patient's tooth color during the design phase. The 20 available shades include 16 VITA shades (A1-A4, B1-B4, C1-C4, D2-D3)+4 bleach colors cover most clinical situations. For reference, A2 and A3 are the most commonly used shades.

Q: Can I mix different shades in one restoration?
A: For single-shade restorations, use one disc. For multi-unit cases requiring different shades, you'll need separate discs for each shade. Consider our ST Multilayer zirconia for natural gradient effects within a single disc.

Q: How does the 43% translucency affect esthetics?
A: The 43% translucency provides excellent esthetics for both anterior and posterior restorations, offering natural light transmission while maintaining 1200 MPa strength. The pre-integrated color enhances the natural appearance.

🏥 Clinical Applications

Q: What cementation protocol should I use?
A: For ST Pre-shaded Zirconia restorations:
1. Clean restoration thoroughly
2. Consider airborne particle abrasion (50μm Al₂O₃) for improved bond
3. Use resin-modified glass ionomer or resin cement
4. Follow the cement manufacturer's instructions
5. Ensure complete seating and remove excess cement

Q: Is ST Pre-shaded Zirconia suitable for anterior restorations?
A: Yes! With 43% translucency and factory-controlled shading, ST Pre-shaded is suitable for anterior crowns where you need both esthetics and strength. For maximum esthetics, consider our SHT or UT series.

Q: Can ST Pre-shaded Zirconia be used for bruxers?
A: Yes! The 1200 MPa strength makes ST Pre-shaded Zirconia suitable for patients with bruxism or heavy occlusal forces. For extreme bruxers, consider our HT zirconia (1300 MPa).

📦 Ordering & Packaging

Q: What thickness and shade combinations are available?
A: ST Pre-shaded Zirconia is available in:
• 7 thickness options: 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm
• 20 Vita shades: A1, A2, A3, A3.5, A4, B1, B2, B3, B4, C1, C2, C3, C4,D2, D3,D4,BL1,BL2,BL3,BL4

Q: How many restorations can I get from one disc?
A: Under normal nesting and standard posterior crown design, one 98mm zirconia disc (12mm thickness) can typically produce approximately 25–35 single crowns.
The actual yield may vary depending on crown design, tooth size, nesting efficiency, and processing loss.

Q: Do you offer sample discs for testing?
A: Yes! We offer sample discs for qualified dental laboratories. Contact our sales team at oneprodental@gmail.com to request samples in your most commonly used shades.

Q: What is your shipping time?
A: We offer fast global shipping with delivery in 5-10 business days. Express shipping options are available for urgent orders. Free shipping on orders over $500!

🛠️ Technical Support

Q: What if I need help with shade selection or processing?
A: Our technical support team is here to help! We provide assistance with shade selection, milling parameters, sintering protocols, and workflow optimization. Contact us at oneprodental@gmail.com anytime.

Q: Do you offer bulk pricing for dental laboratories?
A: Yes! We provide competitive volume discounts for dental laboratories. Contact our sales team for bulk pricing, partnership opportunities, and customized solutions tailored to your laboratory's needs.

💬 Still have questions? Contact our expert team at oneprodental@gmail.com or use the live chat feature. We're committed to your success with every restoration!

OnePro Dental Zirconia Series