Dental Zirconia Blanks & Discs — Pre-Sintered 3Y-TZP for CAD/CAM Prosthetic Fabrication
SEMITECH Dental Zirconia Blanks are pre-sintered 3Y-TZP discs and blocks in three translucency tiers — Standard (ST), High-Translucency (HT), and Ultra-Translucency (UT) — CIP-pressed to controlled density (2.9–3.1 g/cm³) for optimal machinability, exceeding ISO 6872 Type II Class 6 requirements. Competitively priced via direct sourcing from ISO 13485-certified Chinese producers.
Technical Specifications — Pre-Sintered Blanks
| Parameter | Unit | ST Grade | HT Grade | UT Grade | Test Method |
|---|---|---|---|---|---|
| Y₂O₃ content | wt% | 5.15 ± 0.20 | 5.15 ± 0.20 | 5.30 ± 0.20 | XRF |
| ZrO₂ + HfO₂ | wt% | ≥94.5 | ≥94.5 | ≥93.0 | XRF |
| Al₂O₃ | wt% | 0.25 ± 0.10 | 0.05 ± 0.02 | ≤0.05 | XRF |
| Pre-sintered density | g/cm³ | 2.9–3.1 | 2.9–3.1 | 2.9–3.1 | Geometric |
| Pre-sintered hardness | — | Chalk-like | Chalk-like | Chalk-like | — |
| Disc diameter | mm | 98.0 ± 0.1 | 98.0 ± 0.1 | 98.0 ± 0.1 | Caliper |
| Thickness options | mm | 10, 12, 14, 16, 18, 20, 22, 25 | 10–25 | 10–25 | — |
Sintered Properties
| Parameter | Unit | ST Grade | HT Grade | UT Grade | Test Method |
|---|---|---|---|---|---|
| Sintered density | g/cm³ | ≥6.05 | ≥6.05 | ≥6.05 | Archimedes |
| Linear sintering shrinkage | % | 20–25 | 20–25 | 20–25 | Dimensional |
| Flexural strength | MPa | ≥1200 | ≥1100 | ≥900 | 3-point bend (ISO 6872) |
| Fracture toughness | MPa·m^0.5 | 8–12 | 6–9 | 5–7 | SEVNB |
| Vickers hardness | HV10 | 1250–1350 | 1200–1300 | 1150–1250 | ISO 6507 |
| Translucency (1 mm, sintered) | % | 33–37 | 40–45 | 48–53 | Spectrophotometer |
| CIE L* (sintered, A2 shade) | — | 72–75 | 70–73 | 68–71 | — |
| Radioactivity (Th + U) | Bq/g | ≤1.0 | ≤1.0 | ≤1.0 | ISO 6872 Annex C |
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Application Suggestions
Posterior Crowns and Multi-Unit Bridges
ST blanks deliver ≥1200 MPa flexural strength and 8–12 MPa·m^0.5 fracture toughness — preferred for posterior crowns and bridges up to 16 units. Typically veneered with feldspathic porcelain for anterior aesthetics.
Anterior Full-Contour Restorations
HT blanks achieve 40–45% translucency at 1 mm while maintaining ≥1100 MPa strength — enabling monolithic restorations without porcelain veneering.
Premium Aesthetic Anterior Cases
UT blanks reach 48–53% translucency by increasing Y₂O₃ to 5.30 wt%. Flexural strength ≥900 MPa — recommended for single anterior crowns where aesthetics are primary.
Implant Abutments and Screw-Retained Prosthetics
Machined on 5-axis CAM systems. Biocompatible (ISO 10993), compatible with all major implant connection systems.
Shade and Color Options
| Shade System | Available Grades | Color Layers |
|---|---|---|
| Vita Classical (A1–D4) | ST, HT, UT | Mono, 3-layer, 5-layer |
| Bleach (BL1–BL3) | HT, UT | Mono, 3-layer |
| Custom shade matching | All grades | By request, MOQ 200 pcs |
Technical Support & FAQ: Dental Zirconia Blanks
+Q1: Which CAD/CAM systems are compatible?
All major open-architecture systems: Sirona inLab MC X5, Amann Girrbach Ceramill Motion 2, Roland DWX-52D, Imes-Icore CORiTEC, Zirkonzahn M5, and VHF mills. 98.0 ± 0.1 mm diameter with standard step-holder geometry.
+Q2: What sintering profile is recommended?
Standard: 10°C/min to 1450°C, hold 2h, cool 10°C/min (~8h total). Speed sintering (ST only): 20°C/min to 1530°C, hold 20–30 min (~90 min total). HT/UT grades require standard profiles.
+Q3: How does translucency affect clinical strength?
ST (≥1200 MPa) handles all indications. HT (≥1100 MPa) covers anterior bridges up to 3 units. UT (≥900 MPa) is limited to single anterior crowns. All exceed ISO 6872 for recommended indications.
+Q4: What are pricing, MOQ, and lead times?
Stock shades: 7–14 days, MOQ 50 discs. Custom shades/multi-layer: 3–4 weeks, MOQ 200 discs. Sample discs (2 pcs per grade/shade) available. Contact info@semitechnm.com.
Packing & Storage Information
Individual vacuum-sealed aluminum foil pouches with desiccant. 10 discs per inner carton, 100 per master carton. Each disc laser-engraved with lot number, shade code, and thickness. Store at room temperature; shelf life unlimited in sealed packaging.